Powertrain
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To illustrate the competitiveness of the pushrod design, let’s compare three V8 engines. All are fielded in high performance production cars, all being of aluminum construction and none having direct injection. * Chevy Camaro SS ** BMW M3 *** Mercedes-Benz C63 AMG The pushrod engine offers the highest power and torque density, along with the best fuel economy. It is also the simplest, lightest, smallest and cheapest engine. Why wouldn’t you want a pushrod? The most common reply to that is “civility”. Well, have you driven a small block lately? If you have, have you also driven the other two engines? I have done all that and here’s my opinion on the civility issu…
Last reply by Drew Dowdell, -
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GM's new Family Zero engines will span 1.0 to 1.4L with some members including the 1.4 also spawning a turbocharged variant. The family Zero powerplants were designed specifically for economy and will be deployed in vehicles for markets within and without the USA. The question is... are they the right answer to the challenge of developing the optimum compact car power plant? In my opinion, no. I think GM is chasing the wrong ball -- that of minimizing displacement. I am assuming that the goal is to make the most economical 140hp power plant to power whatever Civic/Corolla challenger GM has in the works. I do not believe that going to 1.4 liters and bolting on a tur…
Last reply by SAmadei, -
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Generation V - Pushrods for the Future The pushrod layout is chosen for the following reasons:- o In the interest of fuel economy, engines should have minimum internal friction. o In the interest of fuel economy, it is better to decrease cylinder count than to decrease displacement. o In the interest of performance, engines should have best in class power-to-weight ratios. o In the interest of packaging, engines should have best in class power-to-size (external dimension) ratios. o Advanced Technology like Direct Injection, Independent VVT and roller followers can be applied to pushrod engines Gen V 6.2 V8s have the highest power-to-weight and power-to-size (…
Last reply by balthazar, -
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OK....so I'm flipping through some old C&D rags and in the 10-93 issue, highlighting the "1994 New Cars" there was an article in the Technical Highlights section talking about GM's new "baby" LT1 variant....a 4.3L version that would be the base Caprice Classic engine along with the optional 5.7L LT1.... Does anyone remember this engine? I don't even remember it existing.....and surprised we didn't see it in other applications (might it have fit tranversly in a GM-10 of the time??) Here's how the two engines compared: 4.3L, SFI V8 (5.7L SFI V8) 200 hp (260 hp) 245 lb/ft torque (335 lb/ft torque) Let me know if you know anything about it...!
Last reply by A Horse With No Name, -
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The Push Rod engine has been much maligned for being ancient, inefficient, low tech etc. It has been called “clunkers”, “American Pig Iron” and a whole host of different derogatory nicknames. But is it really the piece of obsolete trash that it is made out to be? I must say I am a DOHC fan and I applaud GM’s move to put the 3.6 DOHC V6 in everything imaginable. I think that the engine from GM’s lineup I’ll most like to have in my car is the LNF 2.0 liter DI turbo. I love the turbo whistle and I don’t really have a taste for the V8 rumble. But, let’s be honest about the whole Push Rod thing and clear up all the myths shall we? Why Push Rods? There were overhead cam engin…
Last reply by dwightlooi, -
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GM: Eight-Speeds on the Way New gearboxes being studied by Joseph Szczesny | (2007-10-15) | Link to Original Article @ TCC General Motors isn't giving away any of the specifics just yet, but it does have a seven- and even an eight-speed automatic transmission tucked away in its product development cycle. Jim Lanzon, executive director of GM Powertrain's Transmission Engineering, acknowledged last week GM is looking at the transmissions that have begun showing up on luxury models such as the BMW M5. "I can't give away any new product news but we're looking at everything," he said. One of the issues GM is wrestling with now is whether a seven- or eight-speed transm…
Last reply by dwightlooi, -
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I'll get the easy ones out of the way first. 8-6-4 ShortStar DOHC 3.2 V6 <Cadillac CTS> 4100 - "ran" for 4 years... not short enough in my opinion
Last reply by SAmadei, -
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I got word that GM was actually developing a small, very high-power and highly technological DOHC V8 for the C7 before the whole financial crisis fully developed. I don't want to say too much on it because I'm not sure how much is true, but I trust the sources I have on this. Just wondering your thoughts on this since we've always had pushrods in the Corvette and this would be an entirely new direction.
Last reply by z28luvr01, -
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POPULAR MECHANICS Awards GM 3.9 V-6 For Breakthrough Technology New York - General Motors' new 3.9-liter V-6 has been recognized for ground-breaking technology by the editors of POPULAR MECHANICS in the publication's first "POPULAR MECHANICS Breakthrough Awards." The announcement was made today at the American Museum of Natural History and will be featured in the October issue of POPULAR MECHANICS, on newsstands nationwide October 11, 2005. The POPULAR MECHANICS Breakthrough Awards recognize ten individuals and teams, including one winner of the Breakthrough Leadership Award, that are helping to improve lives and expand possibilities in the real…
Last reply by Paolino, -
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Gen V 6.2l DOHC V8 to Power C3XX Fullsize Pickups Second United Auto Workers Agreement Reveals General Motors' Potential Future Truck Plans By: Mike Levine Posted: 10-01-07 12:30 PT | Link to Original Article @ PickupTruck.com A document found online (using Google) at the Future of the Union website suggests that General Motors is preparing to substantially overhaul the engine lineup used in its next generation full size trucks. Future of the Union has published an internal memorandum of understanding that contains detailed information about contract negotiations that took place in June 2007 among the United Auto Worker (UAW) union, General Motors (GM), and GM’s large…
Last reply by aldw, -
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GM powertrain plans: Variety - but no diesel yet Richard Truett | | Automotive News / August 21, 2006 - 6:00 am General Motors' powertrain division is rolling out a variety of fuel-saving, high-tech engines; hybrid powertrains; and six-speed automatic transmissions. Because of high costs, GM does not plan to add diesels to passenger cars and light trucks before at least 2010. Here's a look at GM's strategy: Hybrids: GM plans a dozen hybrids by the end of the decade. But only eight models have been named thus far. GM's hybrid plans are much like its engine strategy. Some hybrid powertrains will be high-value and some high-feature. GM's first real hybrid, the Sa…
Last reply by MyerShift, -
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I am going to make the following predictions with regard to the all new 2.0T engine that will go into the base ATS and GM mid-size vehicles based on logical assumptions of GM's priorities and available technology. Essentially, this engine will mimic the output and torque of the 3.0 liter LF1 V6 while being structured around a design philosophy that minimizes fuel consumption. I predict that they will adopt a Turbo-Miller aspiration cycle engine built on the 2.5 liter block with thicker sleeves. The asymmetrical compression and power strokes maximizes energy recovery per unit fuel burned. Share the same engine block as the 2.5 liter Inline-4 with bore reduced from 88 to…
Last reply by 67impss, -
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I'm still amazed that they were able to punch out the 60-degree V6 to 3.9L displacement. There just can't be much meat left in those blocks with those big 3.9" holes. I remember when the 2.8L V6 first came out in the X cars. When I saw my first one, I was amazed at how puny it looked. I couldn't imagine that it could be bored or stroked any more...but then along came the 3.1L. Anyone know a good source for info on these engines? I'd love to see the innards. Wikipedia has a decent description but I need visuals! Thanks.
Last reply by dwightlooi, -
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They're the same size (231ci/3791cc), but the 3900 has more power and can have DOD. Is the 3900 simply a more modern 3800 with a slightly bigger crank?
Last reply by ponchoman49, -
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Of the various (relatively affordable) transmissions and drive technologies being developed, or can be developed, what will you see most as a standard feature on GM vehicles? The keyword here being "most", hence you may only choose one.
Last reply by Drew Dowdell, -
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Why Two Stroke? Because a 2-stroke engine fires twice for every firing of a 4-stroke engine. This means that the 2-stroke engine has potentially up to twice the output of a 4-stroke engine of the same displacement. Because it does twice the work at the same rpm, it also makes does it with half the parasitic friction (all else being equal). Eg. when both types were available on the market, no 125cc 4-stroke motorcycle ever makes as much power and/or weigh as little as a 125cc 2-stroke bike. The problem with 2-Stroke designs... However, the 2-stroke engine has many traditional short comings, some of them utter show stoppers. To begin with 2-stroke engines usually burn a …
Last reply by Drew Dowdell, -
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GM Goes Green Company expands its green lineup in future 20XX Saturn Hybrid Sketch by Burns Link to Original Article @ AutoWeek | Published 07/31/07, 11:37 am et General Motors is poised to meet growing consumer demand for cleaner engines with better fuel economy. Under Tom Stephens, group vice president of global powertrain, GM has been working on several hybrid powertrains; a number of clean-running, fuel-saving diesel engines; fuel cells; six-speed transmissions, and other advanced technologies. GM starts rolling out the new products this year. Here's a look at GM's upcoming powertrains: Hybrids: By this time next year, GM says, it will have eight hybrid models…
Last reply by ZL-1, -
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For release: April 13, 2011, 9 a.m. EDT 2012 Chevrolet Camaro Engine: More Power, Efficiency New 3.6L V-6 LFX produces 323 horsepower and 30 mpg on the highway DETROIT – A new, more powerful and more efficient version of the 3.6L direct-injected V-6 will be standard in the 2012 Chevrolet Camaro. It delivers an SAE-certified 323 horsepower (241 kW) at 6,800 rpm – 11 horsepower (8 kW) more than 2011 models. It is also 20.5 pounds (9.3 kg) lighter than the current engine, which enhances efficiency and driving dynamics. The changes to the 3.6L V-6 – known by its new “LFX” engine code – represent greater refinements to an already well-balanced package, including the use o…
Last reply by dwightlooi, -
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What's worse than a bad product is an undifferentiated product. So, here's an idea for an engine which is not currently available from GM's competitors... Type: 2.0 liter reverse flow 60-degree V6 Valvetrain: DOHC 4-valves per cylinder, Intake & Exhaust VVT Construction: Iron Block, Aluminum Heads Balance Shaft(s): One Fuel Injection: Common Rail Direct Gasoline Injection Bore x Stroke: 72.5 x 82.6 mm (Same as 1.4T) Bore Center: 82 mm Displacement: 2046 cc Compression Ratio: 9.3:1 Aspiration: Turbocharged and Intercooled; 1 x Garrett MGT22 Turbocharger Fuel Type: 87 Octane Unleaded Gasoline Power Output: 250 bhp @ 5000 rpm Torque Output: 270 lb-ft @ 1800~…
Last reply by regfootball, -
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Essentially, what we have here is two engines which achieves exactly the same power output. One does it with 4.8 liters and 99 hp/liter, the other does so with 6.2 liters and 76 hp/liter. Both are realistic possibilities. The Pushrod engine has better torque across the rev range and lighter engine mass. The DOHC engine has better specific output and lower displacement.
Last reply by dwightlooi, -
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http://freep.com/apps/pbcs.dll/article?AID...NEWS99/60824015 Just when we thought that GM was not coming to come strong!
Last reply by 91z4me, -
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When the so called HF V6 was created, it was the premium six cylinder in GM's line-up. It went into premium models while the 3.5 and 3.9 Pushrod sixes served the Malibu, G6es and other high volume models. With GM going to the DI V6 across the board in the near future, there no longer a Hi-Lo mix. I believe that it'll be worthwhile to create a new derivative of the DI V6 engine specifically for premium applications as the Standard DI V6 moves into the mainstream. The premium version will focus on delivering greater refinement, performance and runs on 91 Octane. The idea is not to build a sports car engine here, rather it is to give the engineers a free hand to improve the…
Last reply by regfootball, -
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I would like anyone and everyone's help to figure this some things out about the Ultra V8, insider help is especially appreciated. Alright so what do we know about the Ultra V8? It will be OHC with some parts sharing with the HF V6. It will be FWD compatible. Speculation: Will it be the replacement for the Northstar? Will it be DOHC or will it be SOHC? Will it be DI or standard injection? Will it be smaller than the Northstar? Will it be RWD? Will it have forced induction applications? Will it be available with a stick? Will it fit into an epsilon? Will it be a global engine or just in the US, like the Northstar pretty much is? Will it have dif…
Last reply by Drew Dowdell, -
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And since I'm on a oil kick, I figured I'd ask the question: What do you think the factory fill for that 1.4 turbo is going to be Mobil 1?
Last reply by vonVeezelsnider, -
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Understanding the 2012 Buick LaCrosse with eAssist System V. V. Haldavnekar 2010/12/05 With the 2012 Buick LaCrosse General Motors (GM) introduced the second generation Belt Alternator Starter (BAS) system, officially known as the eAssist, at the 2010 Los Angeles Auto Show. GM claims that eAssist, which means "light electrification" helps the near 2 ton car achieve a 25 percent increase in the fuel economy compared to the fuel economy of the 2.4L, 4 cylinder/6-speed LaCrosse. GM expects the eAssist LaCrosse to deliver a class leading fuel economy of 25 mpg city and 37 mpg highway. The system will be standard on all 4-cylinder equipped LaCrosses. The e…
Last reply by dwightlooi, -
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Buffalo, NY – General Motors today announced it will invest $300 million in its GM Powertrain Tonawanda engine plant to manufacture an all-new, technically advanced dual overhead cam (DOHC) V-8 engine, slated to begin production here in 2009. “This all-new engine will play a critical role in GM’s exciting future luxury vehicle portfolio,” said John Buttermore, GM Powertrain vice president of global manufacturing. “As one of the most technically advanced engines in GM, its power and smoothness will be among the world’s best, and yet more fuel efficient and environmentally friendly.” The investment includes renovation to part of the plant, new machinery and tooling to s…
Last reply by SouthHavenSal, -
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How much does GM underestimate engine power? We all know GM is notoriously conservative when calculating engine power. This has been highlighted the last couple of years as GM has begun a comprehensive program of third-party certification, with nominal horsepower increases even as rival automakers cut power claims with the advent of the new SAE standard. The latest beneficiary is the new higher-output version of the fwd LY7 in the Acadia and Outlook crossovers. Compare the previously published figures with the latest, certified results. Ford and Toyota, read'em and weep. Power (hp / kW) 263 / 196 @ 6600 rpm w/ single exhaust (est.) 270 / 201 @ 6600 rpm w/ single exhaus…
Last reply by Aura XR, -
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AFAIK, Chevy built two - one smallblock and one bigblock. How many each from Pontiac, Buick, and Olds?
Last reply by NeonLX, -
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The 3.6L Direct Injected V6 is a fine engine, making between 288 and 304hp is a wide variety of applications while ingesting an unfussy diet of 87 Octane. However, given that Ford and others have upped the ante on V6 performance, there may be a place for a high output 3.6 to compliment the "Regular" 3.6. This engine shall be targeted at sporty car applications. It is modified for an 18% increase in specific output at the expense of slightly higher costs, a little low end grunt and expects a diet of 91 octane. Proposed changes:- Increased Compression Ratio (11.3:1 --> 12.3:1) More aggressive cam profiles (increased lift, duration and overlap) Revised Int…
Last reply by dwightlooi, -
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have we all heard that GM is moving to a 2.5L 4 cyl to replace the 2.4? if this is true will that be it's only "improvement"? will it maybe be a SOHC with independent vvt? will it get some other better tech? make it HCCI future ready? any ideas? will it just be made to hit 200HP?
Last reply by dwightlooi, -
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How do you pronounce "Ecotec"? Is it E-Co-Tech (like, ecological technology) or Echo-tech (like, I dunno what the heck that would mean). I've always said it the first way, but I've heard people pronounce it the second way. Which (if either) is correct?
Last reply by Turbojett, -
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-- FICTION -- The Microblock V8 The 2011 Microblock V8 engine is designed to succeed both the Small Block and Northstar families as GM’s sole V8 for the second decade of the millennium. The design objective is to create a highly compact engine equaling the LS-family’s performance, while being more compact, more economical and weighing no more than the 3.6 liter DOHC V6. The engine is a pushrod OHV design incorporating the latest technologies including direct gasoline injection and variable cam phasing. Variable rocket ratio was considered but relegated to a future upgrade due to the additional costs and complexities it will incur. The Microblock engine is based nei…
Last reply by dwightlooi, -
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A DIRTY AIR FILTER WILL NOT REDUCE FUEL ECONOMY! Sounds counter intuitive, but it's true! Here's why... In a gasoline engine, the engine's output is controlled by choking it with the throttle body. It restricts the airflow to the engine at all times except when you put the gas pedal to the floor. Whatever the airflow happens to be, it is measured by the Air Flow Meter which then tells the engine how much fuel to inject. A dirty filter reduces airflow to the engine just like the throttle! The filter and the throttle restrictions combined results in the net airflow to the engine. If you have a clean filter, you'll end up using a slightly smaller throttle opening (gas p…
Last reply by dwightlooi, -
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Now that the '08 Malibu ditched the LZ4, there aren't many cars left with it. G6, Aura, Impala, that's pretty much it. And by the sound of things, the next iteration of these cars will use the 3.6L as well. So the family is dead, basically? EDIT: Changed the title to reduce flames.
Last reply by dwightlooi, -
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GM has claimed that along with direct injection, the upcoming Gen V Small Block V8 will feature a (quote) "brand new combustion system". This has left many guessing at what that is supposed to imply. The common speculations are:- Cam-in-cam independent VVT Variable Valve Lift Advanced version of Cylinder Deactivation Some combination of the above But, I think we may all have overlooked the obvious... There has been much talk about the possibility -- some even say likelihood -- that the next generation V8s will see a downsizing of displacement rather than improvements in performance. However, reducing displacement is not nearly as effective as going to an Atk…
Last reply by dwightlooi, -
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Eight Speeds Not Just for Lexus Anymore? General Motors might not be the first company that comes to mind when thinking about high-tech gadgets and gizmos. But a new trademark filing suggests The General might be planning to go after technology-obsessed Lexus with an eight speed transmission of its own. On August 8th, GM registered the name "8 Speed" (pictured) in reference to automobile transmissions. To us, this can only mean one thing. Currently, Lexus is the only automaker with an eight speed transmission. Might GM's Cadillac and Buick brands be getting ready to fight back? Pictured right is the styled text intended for the trademark (low-resolution only). Read "Tra…
Last reply by 76ChevyTrucker, -
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GM Takes New Combustion Technology Out of the Lab and Onto the Road PONTIAC, Mich – Engine experts have dreamt about it, talked about it and lectured about it, and today – for the first time – General Motors is letting outside parties drive the “most awaited advanced combustion technology” of the past 30 years. GM demonstrated the combustion process, known formally as homogeneous charge compression ignition, or HCCI, for the first time in two driveable concept vehicles, a 2007 Saturn Aura and Opel Vectra. When combined with the enabling advanced technologies such as direct injection, electric cam phasing, variable valve lift and cylinder pressure sensing, HCCI provides…
Last reply by thegriffon, -
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GM Plans First Light Duty V-8 Clean Diesel for North America High-efficiency V-8 scheduled for pickup trucks under 8,600 pounds Gross Vehicle Weight and HUMMER H2 Low emissions, high performance and excellent fuel economy Expected to deliver class-leading torque, power and refinement Manufactured at the GM Powertrain Tonawanda engine plant TONAWANDA, N.Y. – General Motors Corp. will introduce a new, state-of-the-art 4.5L V-8 Duramax turbo-diesel that improves engine fuel efficiency by 25 percent, reduces CO2 emissions by 13 percent and cuts particulates and NOx emissions by at least 90 percent for North American light duty trucks and the HUMMER H2 built after 200…
Last reply by FUTURE_OF_GM, -
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I saw two RPO codes for that engine on Wikipedia, LZ8 and LZ9. Both of them have VVT and DOD, according to that. What are the differences then?
Last reply by NeonLX, -
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GM May Sell Allison Transmission General Motors Corp. said Thursday that it may sell its Allison Transmission division as part of its effort to raise money and focus on its core business. GM said in a news release that "it is looking at strategic options" for the Indianapolis-based transmission unit "including a potential sale of the business." The world's leading automaker lost $3.05 billion in the first three quarters of 2006. Allison Transmission has 3,400 employees and seven plants in Indianapolis. It makes and sells automatic transmissions for commercial and military vehicles. "This process is another potential step in GM's plan to improve liquidity through th…
Last reply by Camino LS6, -
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Drove a rental 2013 Impala with the 3.6 engine with only 13K miles. Motor seemed pretty noisy during passing and merging acceleration. My 2008 Impala with the 3.5 engine only about half the noise under the same circumstances. My question is, will the new 2014 Impala have the same engine, because I was considering on buying this car. Maybe I was wrong on the amount of noise of the 3.6!! Any throughts?
Last reply by Drew Dowdell, -
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GM has been sucking for years. I know many of you don't to hear that or admit that, but it's true. GM sucked in the 80s. They sucked in the 90s. They have been dong all the bean counting and quality skimming possible in order to remain the "value leader" while operating out of a high cost country (USA). It's a moronic formula, but for over two decades they stuck to it. Today, GM vehicles (and most American cars for that matter) are viewed as technologically and qualitatively inferior products with a dubious reliability record, poor economy and resale values in the toilet. GM has finally awaken -- the GMT900s are OK, G6es are decent enough, the Aura is yet another step for…
Last reply by turbo200, -
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Not having much access to the older GMs back when there were divisions, I wonder if you guys can enlighten me on some things. Buick had a 455 and Olds had a 455. Buick, Olds, Chevy, and Pontiac all had 350s I'm sure there were some other overlaps of displacement as well. Did all of these engines have dramatically different personalities? For example, why did the Chevy 350 survive while the Rocket, almost nearly as well renowned, was canceled in 1990 and Pontiac's and Buick's 350s canceled much earlier. I can understand the reasoning behind wanting just one common V8 engine design, but what I'm asking is why one of them won out over the other.
Last reply by NeonLX, -
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GM has too many V8s in production... 4.6 (DOHC), 4.8, 5.3, 6.0, 6.2 and 7.0. There's no reason to have six different eight potters not to mention multiple variants for some of them. GM should standardize on one V8 block and heads. This is something which has been tried quite successfully in the V6 world by companies like Nissan (with its VQ35 V6) and it makes even more sense in the V8 world given the lower overall volume. Money saved through commonality and economies of scale can then be spent on technological content. I propose a 5.5 liter displacement in four different different guises. GM Gen V Small Block V8 - Basic Specifications Type: Cross Plane 90 deg V8, alu…
Last reply by Z-06, -
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Should the Corvette abandon the V8 for an I6? Or, maybe, its Camaro little brother should? Although the Corvette is most identified with a V8 -- more specifically various iterations of the small block V8 -- it started life with an I6. Now that first Corvette wasn't very good, but fundamentally an Inline-6 is a smoother and more refined engine configuration than a V8. The I6 and H engines are the only ones with zero 1st and 2nd order vibrations. It also allows contemporary technology such as VVT phasers to be incorporated with half as many actuators as a V-layout because it has half as many camshafts. The I6 is also fundamentally stronger than a V8 because it has seven ma…
Last reply by CaddyXLR-V, -
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Link: http://media.gm.com/servlet/GatewayServlet...n=2&docid=17540
Last reply by GMinTheDriveway, -
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The 1.8 Ecotec XFE is a concept centered around building the most most fuel efficient engine that will deliver 140hp -- the approximate baseline requirement for a FWD compact car in the same size class as the Cruze, Civic and Corolla. Basic Design Type: Inline-3 w/counter rotating balance shaft Aspiration: Naturally Aspirated w/Part Time Atkinson Cycle operation Construction: Aluminum Block and Heads Displacement: 1788 cc (109 cu-in) Bore x Stroke: 88 x 98 mm Bore Center: 96 mm Valvetrain: Chain Driven SOHC 4-valve per cylinder (2 x concentric camshafts) Fuel Injection: Direct Gasoline Injection Compression Ratio: 11.2:1 (7.5:1 in Atkinson mode) Pow…
Last reply by dwightlooi, -
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What if GM goes back to 2-valve per cylinder -- either with a Pushrod design in a V6 or SOHC design in I4s and/or I3s? With today's technological content, the engines will perform more or less like this:- 1.5L SOHC 6-valve Inline-3 w/ VVT & Direct Injection -- 111 bhp @ 6000 rpm / 113 lb-ft @ 4600 rpm 2.0L SOHC 8-valve Inline-4 w/ VVT, & Direct Injection -- 149 bhp @ 6000 rpm / 151 lb-ft @ 4600 rpm 1.5L SOHC 6-valve Inline-3 w/ VVT DI and turbocharging -- 170 bhp @ 5200 rpm / 180 lb-ft @ 2600~5200 rpm 2.5L SOHC 8-Valve Inline-4 w/ VVT & Direct Injection -- 183 bhp @ 6000 rpm / 185 lb-ft @ 4600 rpm 2.0L SOHC 8-valve Inline-4 w/ VVT, DI and turbocharging -…
Last reply by dwightlooi, -
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What are the main differences between the three? Also, if you were to buy a LS1 car, would it be easy to turn it into an LS2 or LS6? TIA, guys!
Last reply by schuby87, -
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The HHR SS is a big deal. Not that I care for the 50s wagon looks or the vehicle interests me in anyway. (1) It is a big deal because this is the first transverse engine, FWD, application of the 2.0 liter DI-VVT Turbo engine (LNF). (2) It also confirms that GM is not toning down or castrating the LNF to a lower power level for sideways, FWD, applications. Transverse LNFs will still be 260hp. (3) The Chevy Cobalt SS Supercharged has been retired from the lineup. Before the HHR SS came along there are all kinds of doubt as to whether an effort will be made to repackage the LNF for FWD applications and hence whether the Cobalt as a chance of getting the turbo engine. N…
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meida.gm says the 3.6L for lambda is gearing up. -------------- FOR RELEASE: 2006-09-22 Flint Engine South Begins Production Of Versatile 2007 GM 3.6L V-6 VVT Engine This Week FLINT , Mich. – Today, General Motors delivered on its 2004 promise to invest approximately $300 million in its Flint Engine South manufacturing plant, further strengthening a key GM manufacturing center and contributing to the state and local economy. GM Flint South began production of the 3.6L V-6 with variable valve timing (VVT), which is used in the 2007 Cadillac CTS, SRX and STS; Saturn Outlook; GMC Acadia and slated for the 2008 Buick Enclave. The 3.6L V-6 VVT is an all-aluminum, dua…
Last reply by ponchoman49, -
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Direct Injection Connection Flint Engine South building GM's next generation engine THE FLINT JOURNAL FIRST EDITION Thursday, February 01, 2007 | By Todd Seibt FLINT - Imagine an internal combustion engine that cuts nasty tailpipe emissions, leans itself out in cruise mode - and can still kick gas when it's time to pass. Too good to be true? Actually, it's being built near you. Workers at General Motors Flint Engine South have already assembled a few pre-production versions of the next generation of GM's spark ignition direct injection 3.6-liter V-6 engines. They expect to start full production in April, for installation in the all-new 2008 Cadillac CTS, and…
Last reply by dwightlooi, -
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GM Diesel Engine Lineup - Circa 2013
Last reply by dwightlooi, -
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If you need a real world example, here's one... Despite 1.2 liters of extra displacement, 60 more horsepower and 80 more lb-ft of twist, the pushrod engine matches the DOHC V8 in city fuel economy and exceeds it's highway rating by 1 mpg. Ford F150 4WD -- 5.0L DOHC-32v V8 -- 360 bhp @ 5500 rpm / 380 lb-ft @ 4250 rpm -- 14 mpg (City) / 19 mpg (Hwy) GMC Sierra Denali 4WD -- 6.2L Pushrod-16v V8 -- 420 bhp @ 5600 rpm / 460 lb-ft @ 4100 rpm -- 14 mpg (City) / 20 mpg (Hwy) Now, let's also compare a 5.3L Pushrod V8 with a 3.5 liter DOHC Bi-turbo V6. To its credit, the Twin Turbo V6 has 10 more hp and 37 more lb-ft of twist. But, the Pushrod V8 is actually the more economical …
Last reply by dwightlooi, -
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G. David Felt Alternative Fuels & Propulsion writer www.CheersandGears.com Connect & Cruise CRATE POWERTRAIN SYSTEMS GM has launched their complete solution packages for older auto's. Including both RWD and 4WD solutions, GM wanted to get these launched with a mail-in rebate for an end of the year present to all motor-heads. GM is offering 12 different combinations including emissions certified E-ROD packages. These packages include a factory tuned engine and transmission with all the electronic control modules, wiring harness and other key components so you can truly strip out the old powertrain and go modern. Engine choices come as follows: …
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Yeah, couldn't think of the code for the NA version (the SC is the L67). Anyway, what are the differences between the two? I know the L67 is supercharged and only fits in GPs, but are there any forged internals? In other words, could you pretty much take a regular NA 3.8 Series II Grand Prix and throw on an M90 supercharger (andthe spark plugs and all that) and have an L67 right there? Or is there more to it? Just curious. Thanks in advance.
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L67 still has the stuff, just found this tonight, its actually a month old http://zzperformance.com/grand_prix/latest_news1.php?id=112 stock used block/lower end, stock differential & final drives, not too shaby !
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Well, with the recent press release about the 3.6L HF V6 w/DI, discussion arose about what GM would do with the Northstar. If the same percentage gains are made on the Northstar as on the 3.6L HF V6, the Northstar would deliever approximately 370HP and 340 lb-ft without any other modifications. I'm sure with a few more tweaks it could be up to 380HP and 350 lb-ft. So, if a DI Northstar made 380/350, does everyone think this would be sufficient or should GM develop a new DOHC V8 for Cadillacs and Buicks?
Last reply by 76ChevyTrucker, -
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GM Anxious To Sell New Two-Mode Hybrid Transmission To Other Automakers Link to Original Article @ AutoNews Ford and General Motors could get a lot closer. The automakers have co-developed a six-speed automatic for front-drive cars. Now Ford is interested in using GM's Two Mode hybrid transmission, which debuts on the 2008 Chevrolet Tahoe and GMC Yukon SUVs. Kuzak said Ford has been talking to GM about buying a version of the Two Mode for use in rear-drive trucks. No deals have been announced. GM is anxious to sell the transmission to other automakers to increase production and lower costs. GM also has a fwd version of the Two Mode slated for production next ye…
Last reply by loki, -
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http://www.autobloggreen.com/2008/07/15/ne...-di-4-cylinder/ This engine sounds like a logical successor to the 2.4L.
Last reply by dwightlooi, -
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http://www.autoblog.com/2009/02/19/ls9-cra...than-most-cars/
Last reply by Robert Hall, -
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This proposed 2.1 liter Ecotec Adv can replace the 2.0 liter, 2.2 liter and 2.4 liter Ecotecs. The engine is available in naturally aspirated form (with HCCI) and turbocharged form (without HCCI). The HCCI engine serves as the base engine for the RWD Pontiac Solstice, new RWD Pontiac G6, the Saturn Sky, the new RWD Holden Torana, the FWD Chevy Malibu and FWD Chevy Cobalt. The turbocharged engine is available as an option on the Solstice, G6, Sky, Torana and the Cobalt. The Malibu receives a 300 hp HCCI 3.6 liter V6 option. Gear changing is accomplished by either the 6L50, 6T40 or 6T70 6-speed automatic transmissions. There is no manual gear boxes offered even on the RW…
Last reply by AAS, -
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General Motors to buy stake in diesel engine manufacturer Buys 50% of VM Motori from Penske Corp July 16, 2007 | BY KATIE MERX | Link to Original Article @ Detroit Free Press General Motors Corp. announced on Monday that it has agreed to buy a 50% stake in Italian diesel engine manufacturer VM Motori S.p.A. from Penske Corp. in a deal expected to expand GM’s diesel expertise in global markets. “Diesel engines have a very important role in GM’s global advanced propulsion strategy,” Tom Stephens, group vice president of GM Global Powertrain and Quality, said in a statement. “We are leveraging expertise and resources within our company and through technology partners to …
Last reply by thegriffon, -
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other than the possible supercharged 6.2L in the corvette, any ideas of this engine's designation and output #'s ? (not the specs from the escalade now) any news on this or ideas when (near official) news of this would appear?
Last reply by FUTURE_OF_GM, -
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The Problem Direct injection, as many of you know, allows for charge cooling, more precise fuel metering and a higher degree of atomization. This consequently permits a higher compression ratio to be adopted which in turn affords greater fuel economy and higher performance. Sounds good right? Well, there's a catch. Direct Injection also presents a few problems... Noise from the injectors Carbon fouling of the intake valves, intake tracts and/or throttle assemblies. The reason is simple. Every engine has some degree of blow by past the valves when they are closed and many deliberately circulate exhaust gases into the intake side -- via valve event overlap and/or EGR …
Last reply by dwightlooi, -
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Well, lately I've noticed mileage estimates for old cars have changed and reduced, dramatically in some cases. I drive a 2001 Chevrolet Malibu. It used to be rated at 20 mpg city, 29 highway. Now it's rated at 16 mpg city, 26 highway and 21 combined. Can anyone tell me how the hell this was done? Was everything re-tested or just reduced by a certain percentage? Is this accurate at all do you think? I have never seen anywhere near 16 mpg even in all city driving and with a lead foot. Maybe these are good estimates but the older GM engines don't get mileage that bad? Perhaps this is a gimmick to make new engines seem more efficient? I really don't understand. We hav…
Last reply by Blake Noble, -
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Since the Eco has been out for a while now ( Saturns, Cavaliers)...I was curious-do you feel it is a good engine ? (overall) I would have to say yes, at least for me. NO issues at all with mine, though it only has 35k on it now... Guy I work with has 120k on his 03 Cavalier w/ the eco. No issues at all-still runs well-burns a tiny bit of oil. Not bad for a beat on car. Neighbor is a sales rep. Has almost 90k on his Cobalt. Speedo just stopped working, but his engine is holding up well too... So far so good...
Last reply by daves87rs, -
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All right, since this is completely opinionated here.....I personally believe that a bulletproof engine/transmission combination is the Chevrolet 350 strapped behind a THM400 transmission. Great power, reliability out of this world and simplicity all day long. Now y'all take a swing at it. What do you think is the best engine/transmission combination to be used by General Motors so far?
Last reply by ToniCipriani, -
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So why do we have both a 240 & 227 HP spec for the 3900 ?
Last reply by trinacriabob, -
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I'm curious as to what benefit(s) the G80 Limited Slip Rear Differential would provide me on my Saturn SKY. The SKY will be a 3rd vehicle in my household and will only be used on nice sunny days (no rain unless I get caught in an unexpected storm and definitely NO snow). Should I include it when I option my image when at the dealership, or should I save myself some $$$? (anyone know the cost, presumably on the Solstice?) EDIT: $195 (Solstice), per GMBuyPower.com (is it worth the $195)???
Last reply by Bizz, -
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GM developing home hydrogen refueling device 24-September-2006 Source:Chris Woodyard-USA Today General Motors is building a prototype for a home hydrogen refueling unit in hopes of selling fuel-cell cars by 2011. The unit, which would make hydrogen using either electricity or sunlight, would help sidestep one of the most vexing problems surrounding the creation of the pollution-free, alternative-power cars: how to persuade oil companies to invest in expensive new hydrogen stations that would compete with their core product, gasoline. The automaker's goal is an affordable, compact unit that would allow customers to fill their cars overnight in their own garage…
Last reply by goblue1999, -
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With gas prices rising as high, if not higher than they were last summer and with VW's Jetta bluetec 2.0TDI rumored to get 40/60 mpg, I'm wondering if GM is missing an opportunity. I know that diesels cost more - and GM is skeptical that people would be willing to pay that premium, but consider this: If you drive 15,000 miles/year and your 4cyl car averages 30mpg, you'll consume 500 gallons of gas. Prices in my neighborhood for gasoline just jumped to $3.39 today.. so that's $1695/year. If you get 60mpg in your TDI, you'll consume 250 gallons of diesel. Current prices for diesel here are $2.79/gallon, which gets you to $697.50/year. You are a 2 diet coke's away fr…
Last reply by dwightlooi, -
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I thought you guys might like to see this. A dyno specialist I know from an Australian performance forum posted this. It's the LS1 in one of his co worker's cars. His co worker is not happy at the moment.
Last reply by Jamie, -
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On the Cobalt both engines get 25/35 with the manual transmission and 24/32 with the automatic. I know it's because the 2.4 has VVT. Is GM working on putting VVT on the 2.2? Or maybe even making a slightly smaller Ecotec with VVT? It doesn't make a lot of sense to have a the 2.2 get the same mpg as the 2.4. I'd be pretty impressed if GM had an engine which could get something in the high 20's in city driving and high 30's for freeway driving, which is something that a 2.2 with VVT could probably accomplish.
Last reply by TurboRush, -
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If we take a step back and reconsider the good old Tachometer, one has to ponder... does all those markings and graduations matter? I mean do you really care if to know if the engine is making 4153 rpm? If you do, most tachs are not marked that precisely anyway. If all that is important is knowing roughly where you are in the rev range then do all those graduations serve only to clutter up and confuse? In the course of daily driving -- even spirited driving -- what really matters really are the basics. Is the engine idling at the intended RPMs? Am I about to bump the rev limiter? Where I am on the rev range? Am I crusing at an economical engine speed? I propose a very…
Last reply by regfootball, -
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So when do you think the next northstar will come out and what do you think it will be rated at? The HO 3.6 got a 25 hp boost from new heads and some better breathing. its said to get up to a 15 percent power increase from DI. that 25 hp from the new head is about a 10 percent increase and with a 15 percent Di bump the 275 hp 3.6 would put out an impressive 316hp. So a better breathing northstar with a 10 percent boost would be 352 hp and that increased by 15 percent by DI would be 405 hp. Thats pretty high and I would love to see that out of an NA northstar in the "new" STS but I dont think thats going to happen or be quite that high when it does come out. What…
Last reply by 76ChevyTrucker, -
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4th Generation Ecotec (circa 2017) The 4th Generation Ecotec represents a significant architectural shift in GM’s High Feature engines and a significant reduction in the number of different engines in the lineup. There is no longer Family 0, 1 and 2 Ecotecs, and the total number of concurrently produced variants goes from 24 to just 5 for all applications. The following summarizes the key features of the Ecotec4:- All engines are turbocharged and utilize air-to-water intercooler(s) All engines sport a 79 mm (bore) x 81.5mm (stroke) with a 10.8:1 compression ratio The valvetrain transitions to a SOHC layout with concentric cams 2-stage cam profile switching and dual ind…
Last reply by dwightlooi, -
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other than the cost to implement it, would there be any benefits to make an OHV&C engine? say... OHV for intake, 2 valves and vvt. OHC for exhaust, 1 valve and vvt. : or vice versa yes, i bet there would be packaging problems on the front of the engine and in the heads/valve covers... oh well anyone else thought of this or any other "crazy" engine designs? should this be in tech section? edit:changed an accidental smilie
Last reply by 91z4me, -
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GM To Invest $100 Million In New York Plant For Diesel Engine Production TONAWANDA , N.Y. – General Motors Corp. will invest $100 million in its Tonawanda engine plant to produce an all-new, 4.5-liter V-8 Duramax high-output diesel engine for the Chevrolet Silverado and GMC Sierra light-duty pickup trucks and the HUMMER H2. The engine fuel efficiency improves by 25 percent when compared with gasoline engines. Environmental benefits of the new engine include a 13-percent reduction in CO2 versus gasoline engines, and at least a 90-percent reduction in particulates and NOx when compared to diesel vehicles today. The investment includes a 200,000-square-foot facility ren…
Last reply by A Horse With No Name, -
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Are the improvments made to this engine specific to the Malibu or do all GM cars using this engine have the improvements too? Just wondering.
Last reply by avro206, -
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Link: http://media.gm.com/servlet/GatewayServlet...n=2&docid=17537
Last reply by Northstar, -
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I thought you guys might be interested in the engine that one of the tuners I know on an Australian forum has built for his street/strip car. The engine isn't run in yet, so the revs have been limited to 4500 and the boost is currently capped at 10 psi, but even with those restrictions it's producing 455 rwhp at 4500rpm running through a T56 6 speed. Once its run in, he'll be winding up the boost and the revs. He's aiming for 700 rwhp on pump fuel and 10 second 1/4 mile times. He runs this place: http://www.castlehillexhaust.com.au/ and there's lots of other interesting stuff in the picture gallery.
Last reply by 76ChevyTrucker, -
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AS you all probably know the 08 vette has the new 6.2 450 hp LS3 v8 standard replacing the 6.0 400 hp LS2. Anybody know anything about the LS3 besides the 450 hp figure? Tourque, redline, power band etc? Does it have DOD or VVT or both? What cars do you think it will end up in as all of the recent LS2 cars are dead. No more SSR, GTO, or CTS V. The future CTS-V is supposed to get at least 500 hp so this engine won't end up there. Will this be exclusivley a Vette engine? What do you guys think...
Last reply by dwightlooi, -
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Richard Truett Automotive News August 25, 2008 - 12:01 am ET DETROIT — General Motors' heavy investments in powertrain technology are beginning to pay off in terms of better fuel economy. -- GM is slowly building its hybrid business and will launch one new hybrid per quarter for the next four years. -- The company has just opened an advanced powertrain testing laboratory in suburban Detroit. -- The automaker is rolling out engine technologies that maintain performance while lowering emissions and fuel use. -- GM has been adding gears to automatic transmissions, reducing the weight of its powertrains and designing engines capable of being mass produced wit…
Last reply by ZL-1, -
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GM Developing Small Engine in Korea, China New motor partners with Daewoo, Suzuki By ALYSHA WEBB | Link to Original Article @ AutoWeek | Published 06/26/07, 12:03 pm et SHANGHAI -- General Motors is developing an engine in Korea and China that may be used globally to replace GM's 1.6-liter engine, say supplier and other sources. The engine is being developed jointly at GM Daewoo Auto & Technology, which is a GM subsidiary in Korea; and the Pan Asia Technical Automotive Center Co. in Shanghai. It will be available in 1.4- and 1.6-liter versions. GM Daewoo said it will not comment on future programs. The new engine would be useful in the United States, where GM …
Last reply by dwightlooi, -
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Ok, think of the top of a cylinder on a GM pushrod. Ideally, you'll have 3 valves, put possibly only 2. You have a rocker assmebly sitting over the top of the valve that actuates the valve itself -- and that takes room. You don't want to limit placement of the spark plug -- ideal location is dead center of the cylinder -- to provide with a complete, uniform spark -- which will give you the cleanest, most efficient fuel burn. How do you squeeze a fuel injector into that all that? If direct injection provides the substantial power boost and fuel economy gains it's rumored to deliver, does this deliver a death-blow to GM's pushrods? I'm not saying t…
Last reply by Teh Ricer Civic!, -
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The entire notion of turbocharging, big power, boost and compression warrants a discussion. Recently, the following question had been posted on a different site and thread... "The CLA45 AMG runs 8.6:1 Compression and 26 psi of boost. 26 psi of boost is 40.7 psi of absolute pressure. If you are squeezing 8.6 parts of that into 1 won't you have and effective compression of (14.7+26) / 14.7 x 8.6 = 23.8:1? How can any engine run on 23.8:1 of compression without blowing up?" The responses range from the effective compression is not 23.8:1, that somehow you must square root the 40.7 before multiplying it by 8.6, to some other form of alternative fuzzy math to justify the stu…
Last reply by dwightlooi, -
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I have read numerous comments in auto mags and auto guides that newer engines are more efficient and lasting longer? I am in the 200,000 mile club myself (the first time). So what are the reasons? Lower rpms by additional gears, better tolerances in the factory, fuel delivery systems? Please chime in on what is making engines last considerably longer. I am curious. The one that stumps me the most is fuel delivery? How does multi port fuel injection improve the longevity of the engine over carburetion?
Last reply by 76ChevyTrucker, -
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GM Daewoo Celebrates Production of 10 Millionth Engine, Start of Production of New Ecotec Gen Ⅲ Engine Press Release Seoul — GM Daewoo Auto & Technology (GM Daewoo) held a ceremony today at its Bupyeong headquarters to celebrate the production of the automaker's 10 millionth engine and the start of production of its new Ecotec Gen Ⅲ family of engines. “The production of our 10 millionth engine serves as an important milestone,” said GM Daewoo President and CEO Michael A. Grimaldi. “It confirms how far the domestic automotive industry has come and the important role that Korea and GM Daewoo are playing in the global industry.” Road to 10 Million Engines GM Da…
Last reply by thegriffon, -
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doesn't the aura have a ~224hp 3.5L base engine right? that's ~13 hp over the impala, so can they (re)tune the 3.9L for more like 250 easily if they wanted? or did gm just move the torque up the powerband to have a HO 3.5L for saturn?
Last reply by ToniCipriani, -
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DETROIT – Drivers of the new 2014 Chevrolet Impala will enjoy sweet sound and sweeter savings at the pump thanks to precision noise reduction and a new advanced valvetrain technology on the Ecotec 2.5L four-cylinder engine, arriving in dealerships this month. Chevrolet expects the 2.5L model to be a popular choice among Impala buyers. More than two-thirds of Chevrolet cars sold in the first quarter of 2013 had a four-cylinder engine. “Impala customers have three engines to choose from, appealing to a wide array of needs,” said Chris Perry vice president, Chevrolet Marketing. “But the 2.5L model in particular offers both improved fuel economy as well as an accessible sta…
Last reply by dwightlooi, -
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Ownign a GM redheaded step-engine as I do, an LQ1 3.4L DOHC V6, I was wondering about the "Shortstar" 3.5L DOHC V6 as found in the Olds Intrigue, etc., a few eyars back. Has that engine too been completely abandoned after a handful of years, like my LQ1? Anyone have any info, any experience with one? TIA
Last reply by ponchoman49, -
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just curoius what every one thinks the most power N/A the 3.5 and 3.9 could do with things like direct injection, 3v, "performance breathing"? mine- 3.5L - 270hp 250lbft 3.9L - 310hp 270lbft
Last reply by Bizz, -
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do you think either one will come out soon ~ next 2 years or will after market come out first? that might be good if gm could make a v6 w/ more than 300 ft lbs since the 3.8 was pretty close when s/c.
Last reply by Chevysnumberone, -
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http://www.popsci.com/cars/article/2010-11/new-technology-uses-auto-engine-exhaust-generate-electricity
Last reply by Drew Dowdell, -
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link here
Last reply by dwightlooi, -
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I want to keep this a simple poll so forgive me if it seems to lack the typical depth I tend to dwell into on various subjects. The basic premise is this... A 3 cylinder engine is more economical on fuel than a 4-cylinder A 3 cylinder engine is also more compact, lighter and cheaper to build A 3 cylinder engine is more miserly on fuel because it has 25% fewer frictional elements (valves/cylinders/bearings/rods/etc) A 3 cylinder is also easier and more efficient to turbocharge* A 3 cylinder is, however, slightly less refined than a 4 cylinder even with a Balance Shaft added * The reason a 3-cylinder is easier and more efficient to turbocharge is beca…
Last reply by dwightlooi, -
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Eight Engines -- starting with 3-cylinders and ending with Pushrod V8s.
Last reply by dwightlooi, -
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The Chevy volt is a nice technological exercise, but in practical terms there aren’t that many people who want to spend $40K to save money on gas with a plug in vehicle. Not that many wants to pay higher taxes so government can subsidize it either. If you set aside the plug in aspects of the vehicle and just consider its IC-electric efficiency, it is not very impressive. The Volt manages 35mpg city / 40 highway on its 1.4 liter engine, electric motor and whatever energy regeneration through braking it can achieve. That’s worse than the Prius (51 / 48), the Insight (40 / 43) or – in terms of the highway numbers – the Cruze Eco (42). This, quite honestly, is not that stella…
Last reply by pow, -
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There has been much talk about a GM Turbo Six. Here’s how I feel it should be built:- V6 DI Twin-Turbo 3.2 liters engine built using as many off-the-shelf components as possible Engine block from 3.0 DI V6 (LF1) Crank and rods from 3.6 DI V6 (LLT) High efficiency turbochargers optimized for flow. Moderate Boost, High Compression Air-to-water intercooler to avoid bulky air hoses, intercoolers and minimize pressurized volume Specifications:- Valvetrain: Chain driven DOHC 4-valves/cyl w/intake & exhaust VVT Fuel Injection: Homogeneous Charge Direct Gasoline Injection Bore x Stroke: 89 x 85.6 mm (LF1 Bore x LLT Stroke) Capacity: 3195…
Last reply by dwightlooi,
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