Powertrain
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General Motors will inaugurate its newly built engine plant at Talegon on November12th 2010. The new flexi-engine plant, is the first of its kind and can produce both petrol and diesel engines. The commercial production of the New Talegon Engine Plant will commence on November 1st of this year. GM has invested $230 million in this plant which has the annual capacity of 1.6 lakh engines. GM's new engine plant will manufacture four engine variants. The first engine variant will be a 1 L engine that will power GM's Beat car. Beat will be the first car model to get a locally made diesel engine from GM. Chevrolet Beat diesel will be launched during the first quarter of next …
Last reply by 67impss, -
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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 borrowed my grandmothers 2010 CTS wagon with the 3.0 litre V6 yesterday for a trip from central NJ to Virginia Beach, VA and back again. Approx. 650 miles in one day. The reason I had it, is because I take care of her cars for her, and its first service was due. I stopped at the auto parts store to pick up oil and a filter, and was instructed that the 3.0 in the CTS requires a full synthetic oil, preferably Mobile 1 - to the tune of $8.00 a quart, it needs 6 quarts. My question is: Is the 3.0 litre V6 that is in the CTS the same 3.0 litre that was in the Buick LaCrosse, and is in the Equinox/Terrain? If so, does the Equinox require a fully synthetic? It would see…
Last reply by jwbouch, -
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GM's 3.9L V-6 Family Grows With E85-Capable And Fuel-Saving Active Fuel Management™ Versions Chicago, IL. - Today at the Midwest Automotive Media Association meeting Ed Peper, General Manager, Chevrolet, announced General Motor's first V-6 application of fuel-saving Active Fuel Management™ on the 3.9L V-6 offered in the 2007 Chevy Impala, and E85 ethanol fuel capability on the 3.9L V-6 offered in the '07 Chevy Uplander. "The application of Active Fuel Management™ (AFM) and E85 ethanol offers customers more choices when it comes to selecting efficient, fuel-conscious vehicles," said Peper. "E85 fuel reduces the need for petroleum and helps reduce greenhouse gas emissio…
Last reply by loki, -
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Ok, we know that GM's had a substantial investment into their transmissions - with the 6speed fwd and 6speed rwd just hitting the markets. The Allison transmission simply cannot be beat. For engines: 6-speed pushrods: I know that the 3.5l (as used in the Impala) and the 3.9l have been getting active displacement & variable valve timing. 6-speed DOHC: The 3.6l variant of this engine is rumored to be getting direct injection - and should push around 300hp. I haven't heard anything about the 2.8l, 3.2l. This engine was designed so that you could have different bore sizes through the use of cyl. sleeves. It can displace anywhere from 2.8l to 4.0l. I'd imagin…
Last reply by Dsuupr, -
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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: http://media.gm.com/servlet/GatewayServlet...n=2&docid=17540
Last reply by GMinTheDriveway, -
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Help please; This note in my Operator's Manual describes what my car is doing perfectly: "If your vehicle accelerates sluggishly from a stop, and/or the automatic tranxaxle does not seem to shift, a sensor that controls your electronic transaxle may not be working. Driving with these symptoms for an extended period may cause transaxle damage." My question is, How can I find and replace this sensor? Any help would be appreciated. I do not have a service manual for this car. Thanks, Dick
Last reply by shanahand, -
Popular mechanics just came in today, says that "GM will show an HCCI next year" thoughts?
Last reply by Ghost Dog, -
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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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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…
Last reply by dwightlooi, -
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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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I'd never heard of this, but found it interesting..was reading an article in Muscle Car Review about a '70 B-M Chevelle SS 454 w/a Turbo 400 transmission and Hone-O-Drive...column shift and a special floor lever for the Hone-O-Drive...pic showed a thingy between the transmission and driveshaft...some sort of aftermarket overdrive unit?
Last reply by G. David Felt, -
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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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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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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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How will you spec a small car engine -- such as one for the Astra or the Cobalt? If it is up to me it'll be as follows:- Displacement: 1800 cc Bore x Stroke: 88 x 74 mm Construction: Aluminum block and heads. Harmonic compensation: Twin Lanchester type balancers driven by timing chain. Compression ratio: 10.8:1 (12.8:1) Aspiration: Normally aspirated with 4 port mounted intake butterflies and trumpeted velocity stacks. Valvetrain: Chain driven DOHC 4-valve per cylinder with continuous intake/exhaust VVT Fuel injection: Direct gasoline injection with 50~150 psi variable pressure rail Maximum engine speed: 7500 rpm (8,500 rpm) Maximum piston speed: 3642 …
Last reply by dwightlooi, -
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To date, gasoline-electric hybrid vehicles have been designed primarily with improving fuel economy as the primary goal. Although some implementations -- such as those in the Lexus LS600h and RX400h -- have sought to create vehicles with no compromises to performance or even a little gain in this department, no hybrid vehicle to date has been designed with improving handling dynamics as the primary goal and with economy gains as a secondary (but very tangible) benefit. Here, I propose such a concept. Concept Premises:- (1) Hybrid drive trains can be used to enhance handling as well as improve fuel economy. (2) By adding two motors directly to an open differential, we …
Last reply by Drew Dowdell, -
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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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The LNF is a very good engine. 260hp @ 5300 rpm and 260 lb-ft @ 2500 rpm are very good numbers. BUT, they are not as good as they can be. Here's why... This engine revs to 6300 rpm, but the last 800 rpm or so does nothing but give the driver the flexibility of not shifting if he is in a corner and does not want drive train disruption at that specific time. Other than that, this is one engine that should be short shifted way shy of its redline. The KKK K04 turbo used is again, good but not the best. This is very similar to the unit used in the Audi TT 20v 1.8T (225hp version) and is a little undersized for 260 hp. The response of the engine is good, but not as good as s…
Last reply by thegriffon, -
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Here's an in depth presentation on the LT1 Pushrod V8 by its Chief Engineer Tadge Juechter. http://media.gm.com/dld/content/Pages/presskits/us/en/Chevrolet/gen5/_jcr_content/rightpar/sectioncontainer_1/par/download/file.res/LT1%20presentation%2024OC12a.pdf This is an official GM press kit distribution; all relevant copyrights and fair usage etiquette apply. In short, the information is public domain and you may quote it or share it. But, you may not claim it as your own, you may not modify it or distort the information, and you may not use it to sell a commercial product.
Last reply by dwightlooi, -
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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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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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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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will the larger atlas 4 and 5 cyliders mean a larger 6, more to about 4.4L? and would this make closer to the tune of 310hp and roughly 290ft-lbs? factoring DI in, would this make the base v-8 ( 4.8L ) not needed at all? other than the silverado and other gmt 900's, any other possibilities of this engine configuration? any insider have any info along these lines?
Last reply by 76ChevyTrucker, -
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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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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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diesel info Low NVH for New Duramax 4500GM's new light-duty diesel to be quiet, clean By RICHARD TRUETT | AUTOMOTIVE NEWS AutoWeek | Updated: 07/16/07, 11:16 am et DETROIT -- The 4.5-liter turbocharged diesel engine that General Motors plans to introduce in 2010 in light-duty pickups will have breakthrough technology in emissions and noise reduction, says the engine's assistant chief engineer, Jim Minneker. The new diesel is being designed to meet the most stringent federal and California emissions standards and will be available in all 50 states, Minneker said. It will use a urea injection system to control oxides of nitrogen, or NOx. But GM won't be part of th…
Last reply by thegriffon, -
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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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courtesy of Texas Speed & Performance:
Last reply by jmsjags, -
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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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of course it's a tad jumping ahead...(ls3 reveal saturday?) what will the ls3 have improved over the ls2 (other than displacement and power)? will this mean anything quickly ( by 09my) for the high value v6's? those v6's seem like a good thing for the Vue XE, the aura, g6 and the impala, for being a mid level engine. with the 08 malibu losing it's 3.5L (as of right now), will this engine continue in the "NG" Aura/G6? the impala is questionable with the zeta replacement being .."reevaluated" the 3.9L has pretty much been designated an impala (excluding the uplander) only engine, but when the 3.5L recently got the tad HP boost, why not the 3.9L? i know the 3.9…
Last reply by 91z4me, -
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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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So I searched Google and found some stuff on the LS3 in the '08 Corvettes and got some interesting stuff... They're dynoing bone stock around 385 RWHP. CAI adds 10-12 WHP, headers are another 40 WHP, and a cam is about 60 more WHP. The heads can be ported to flow about 10% better than the 320 cfm they do stock. A Procharger is helping significantly with 150 WHP and 120 ft-lb extra on only 5-6 psi (for bone stock engines). So if I'm reading this right... upgrade your Camaro SS's lower end, add some loads of money and work, get a tune, and dyno in well over 600 WHP.
Last reply by SuperSport623, -
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The SAE techbriefs is a can't miss favorite of mine to read. The April 2007 edition shows you why: http://www.sae.org/automag/techbriefs/04-2007/1-115-4-22.pdf After you read the interesting article on GM's 2.9l V6 diesel PCCI (pre-mixed charge compresion ignition) technology, scroll on down to the end of the article & read about the Viper's V10 with cam-in-cam variable valve timing. Note the quote in the tail paragraph:
Last reply by cmattson, -
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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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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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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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I havent posted much here but i thought some of u would enjoy this car as much as i did. http://home.earthlink.net/~bzdel/index1.htm http://www.ls1tech.com/forums/showthread.p...295#post4877295 <<---track runs
Last reply by Carguy, -
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clicky
Last reply by G. David Felt, -
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Okay I need help.I just picked up my Chebey 900 crew yesterday.Traded my Honda Ridgeline because of driveline issues and poor milage.Being a GM retiree I felt criminal in the Honda.So far the 900 is more than I thought.I've got the flex fuel 5.3 with the 342 for milage with 20" Texas Edition wheels. Now being a farm hick I know to pull I need a .410 or at least a .373 rear end.I am going to pull occasionaly a 3000# cargo trailer but usually I'll use the truck as a car.What I'm looking for here are some words of confidence that the truck will give me good milage and pull my trailer when I need to.This looks like a great forum and I feel like I'm home again.
Last reply by 76ChevyTrucker, -
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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.
Last reply by BB_454, -
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I have a gm transmission that appears to be some type of 350 turbo it is marked with an MV3. I am trying to rebuild this tranny but cant seem to find these letter designations. Any help or info is greatly appreciated.
Last reply by amadeusphineas, -
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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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Link: http://media.gm.com/servlet/GatewayServlet...n=2&docid=17537
Last reply by Northstar, -
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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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anyone have insider information on what the next revised engine announce ment will be? the last 2 have been the 3.6L V6 getting DI and before that was the.... 3.9L AFM or the 2.0L turbo DI. right? will the next be an ecotec update? an LSx engine, or something else?
Last reply by dado, -
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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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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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What is the recomended octane for use in these new "HF" engines
Last reply by razoredge, -
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PDF Format -- Adobe Acrobat Reader Required GM 2011 Power Train Lineup -- Complete Guide
Last reply by dwightlooi, -
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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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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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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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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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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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http://www.autoblog.com/2009/02/19/ls9-cra...than-most-cars/
Last reply by Robert Hall, -
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I have a '99 Silverado Z71 with the Vortec 5300 - awesome engine. I have never had any problems with my truck and has served me faithfully from the day I bought it at roughly 144,000 miles until today 168,000. I have put a flowmaster exhaust system on there and have swapped the stock airfilter for a K&N filter. This past summer I bought a Hypertech Power II Programmer for my truck with dual fuel technology. I programmed my truck to run best on 87 octane, for the transmission to have harder shifts to extend trans life, and I reset the governor to 128 mph (my tires' max speed rating). Ever since I reprogrammed my truck there has been a slight rattle behind the driv…
Last reply by VMIZ71, -
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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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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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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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Seeking to tap Dwight's knowledge here..... In terms of engineering and manufacturing costs and tradeoffs, technology vs. technology.....I want to throw these scenarios out there and welcome others to throw out some scenarios of competing powertrain details for evaluation..... Or also in terms of weight and design and performance. On the Cruze for example. The 1.4t does not have DI. Yet it has turbo. In terms of providing the most power and fuel economy for the projected sell prices, was the turbo "in lieu" of DI? i.e. was the turbo and DI about the same cost but the turbo provided more power and FE for the same price? Likewise, A car with a V8 and rear drive o…
Last reply by dwightlooi, -
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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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Could, in theory, the supercharger from the 2.0L S/C Ecotec (Cobalt SC/SS, Ion Redline, et. al.), or any of the aftermarket stage 2 or stage 3's meant ofr the S/C 2.0L fit on the N/A 2.2 or 2.4 Ecotecs with very little or no modification to the mount points or TB? I would assume that all the Ecotec engines are the same on the outside, and that a retrofit installation would be somewhat direct. Are there differences in the throttle bodies and mount points that would prevent this?
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For your reference, click here to see which General Motors engines are SAE-certified.
Last reply by Flybrian, -
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GM Sequel, Part II GM to build the Sequel, its hydrogen fuel-cell car, claiming it has increased its range to 300 miles and 0 to 60 mph in under 10 seconds Way back at the start of 2005, the world's largest automotive manufacturer, General Motors, showed the Sequel advanced hydrogen fuel-cell concept vehicle at the 2005 North American International Auto Show (NAIAS), billing it as the culmination of US$1 billion of intensive research it had conducted into fuel cell technology. Like most show cars, the Sequel was not a working model, but now General Motors Chairman and CEO Rick Wagoner has gone on record as saying "the most technologically advanced car GM has ever b…
Last reply by Sixty8panther, -
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So, I just had my battery replaced in my 2000 Pontiac Grand Prix with the 3800 in it and my SES light came on. How long should it take for the computer to reset? Or is there a way i can find the code to see if there really is something wrong with my car? I made sure the gas cap was nice and tight.
Last reply by Justin Bimmer, -
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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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For almost a decade and a half, the Dual Over Head Cams (DOHC) configuration dominated engine designs from foreign and domestic manufacturers. However, the DOHC layout is not without its flaws. Let's examine its advantageous and disadvantageous. Advantageous of DOHC DOHC heads allow independent Intake and Exhaust Cam Phasing DOHC heads allow centrally located spark plug DOHC heads support cross-flow, 4-valve configurations DOHC heads support minimum actuated valve train mass Disadvantageous of DOHC DOHC heads are very wide, this produces heavy and bulky engines (especially with V6 and V8 configurations) DOHC heads have more cam sprocket…
Last reply by dwightlooi, -
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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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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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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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Slipstream Drive The Slipstream Drive is primary propulsion pack for the Chevrolet Slipstream diesel-electric hybrid. It combines the most efficient internal combustion engine with innovative energy recovery measures to achieve a 75 mpg fuel efficiency target without the inconvenience of a plug in. The power train is also designed from the outset to be roughly half the cost of the Voltec powertrain – through halving the number of electric motors and quartering the battery capacity. The Slipstream drive is designed to be more refined than conventional diesel propulsion by eliminating idle operation of the diesel engine. The diesel engine is coupled directly to the 9-sp…
Last reply by dwightlooi, -
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Testing GM's `Sequel' Fuel-cell concept vehicle peppy, smooth, silent But fuel tanks, batteries make it unusually heavy Sep. 25, 2006. 01:00 AM LINDSAY BROOKE NEW YORK TIMES NEW YORK—If an afternoon behind the wheel of General Motors' latest prototype hydrogen fuel-cell vehicle, the Sequel, is any indication, powertrains of the future will not feel much different from the engines that drive today's cars and trucks. By a seat-of-the-pants evaluation, the Sequel feels reasonably peppy; acceleration is smooth and nearly silent. And it is capable of reaching 90 miles an hour, said Mohsen Shabana, chief engineer for the Sequel program and my passenger. More important…
Last reply by Flybrian, -
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before it's mass produced: could we see VVT like the 08 viper's engine? 3v/cylinder? potent closer to 350+hp and ~320lbft? *dreaming* a 3.2L (just a number gm hasn't made for OHV, in usa) or 3.7L (lop off 2 cylinders) V6 giving ~250HP or ~290hp respectivly and +1-2 MPG over current OHV v6 engines with ~6.5K redlines or turboed for 330hp / 360 hp just rough estimates (not using a calc for power gains) are we still going to have to wait for 3+ years for this v8 or will this tech be pushed up? ...maybe 2 years from now?
Last reply by dado, -
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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 years, cars have relied on (nominally) 12V Lead Acid batteries. However, is it time to leave that behind? Hybrids in general do not make economic sense to most drivers, not the Priuses of the world and certainly not the Volt. They don't make economic sense because the investment in the Hybrid power train will never be recovered for 7~13 years through fuel savings at $3 a gallon even on a Prius like vehicle. This is longer than the average ownership period for a new car buyer. This leaves the notion of owning a Hybrid something that ought to appeal only to solo car pool lane users, green image seekers, Global Warming Coolaid drinkers and people who cannot do elementar…
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, -
Tuner
by furioustee- 2 followers
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WIll installing a tuner on my 2009 Ford Ranger XLT, make a huge difference on its performance? I am planning to purchase a Superchip Tuner for my truck.
Last reply by G. David Felt, -
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All right, someone help me out here. I've got a friend of mine with a 2002 Dodge Ram 3500 4-wheel drive Cummins Turbo Diesel duallie. He's also a truck driver and currently has a Peterbuilt with a Caterpillar 3406T, but is planning to remove the Cat and swap in a Detriot Diesel 60-series in. He's wondering the feasibility and power improvements he'd see with removing the turbo from the Cummins in his Dodge and replacing it with the Caterpillar one.... I have no clue on this one y'all, so I'm open to suggestions.
Last reply by 76ChevyTrucker, -
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There has been much confusion and misunderstanding as to what twin scroll turbos do and why they are used. First of all let's get a few things out of the way. Having two scrolls in the turbine housing:- Does not make the turbocharger itself more efficient or more responsive Having two scrolls have nothing to do with optmizing one for low speed and one for high speed flow In fact, having two scrolls introduce additional passage restrictions to the turbocharger and reduces its turbine efficiency slightly. Twin scroll turbos do not benefit all engine configurations So why are twin scroll turbos used? Well, they are used to solve an exhaust problem that ma…
Last reply by regfootball, -
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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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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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any known plans to put these trannies in passenger vehicles? ... we know they're going into the gmt900s and probably the NG vue... is this going to be an option for larger engines over the BAS system?
Last reply by thegriffon, -
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just an "experiment"... say delta's get a DI 2.2 or the 2.2 is replaced by the 1.4L T .... assuming the 2.8L is too big for the platform, hypothetically do you think there would be a market big enough to build a 2.9-3.2L V6 IC-VVT DI'd OHV engine putting out ~220hp ~210ftlbs as a "sport", not a SS? obviously this is an IF they don't keep the 2.4 or don't upgrade it in the near future....
Last reply by Drew Dowdell, -
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just as a fun/funny thought. why not? a 2.8L v8 twin turbo with ~300 hp and torque, maybe a tad more than that if it was not tuned for economy. yes i realize the size of the engine would be kinda outlandish, ..using the 10% displacement difference, it'd take a ~3.1L CIB engine to make that power. lol a little too micro-block for you dwight? haha shoudl put out a tad more torque than the v6 of that size... rev better? damn, this is seeming totally stupid. oh well, thoughts? how about a 4.2L v12? towards 500hp? what.. it's been done?.... awwwww
Last reply by Sixty8panther, -
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is there any engine other than the 3.9 with the active intake? is there any proof or good rumors it's going to make it into more engines? side question... would that not do much if anything to inline engines power band?
Last reply by razoredge, -
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Well now its becoming apparent it might not be realistic to keep driving the LSS with its size, weight and engine requireing 93 octane So Im looking at the Chevy site and see no listings for EPA milage on any of the models. I go to the Pontiac site and I see the 2.4 powered Solstice is 20-28 EPA. Now that is no better than the LSS except I dont need to buy premium gas, and as much as I'd like a Solstice its not half the car as the Olds... So I was wondering where to find a list of GM's EPAs on various new product.....or can someone give the EPA's to me right here or make a list on a new topic for a sticky in this powertrain forum.
Last reply by pow, -
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GM Varitec Family The Varitec Family of Engines… Replaces the Family One, Ecotec and HF V6 engine families Are designed to be most advanced, efficient and refined in their class Share a standardized 98mm Bore Centers, 88 mm Bores and 88 mm Strokes Span 1.6 to 6.4 liters with 3, 4, 6 and 12-cylinder variants Ground Breaking Technologies Homogeneous Charge Compression Ignition (HCCI) – At low engine speeds and load, Varitec engines operate without using the spark plug to ignite the fuel-air mixture. Instead, it increases the effective compression ratio and adjust the mixture to cause spontaneous ignition very much like a diesel engine. This enables up to a 20% increa…
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link here
Last reply by dwightlooi, -
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I have a rented Monte Carlo for the Easter weekend with a OHV V6 with VVT (variable valve timing). Both the 3500 and 3900 in the MC/Impala have VVT as of this year. How does this system work? Is it an electronic chip? Can it be expected to function trouble free for a long time? The whole concept sounds complicated. Care to shed light on VVT if you know it /understand it?
Last reply by Ghost Dog, -
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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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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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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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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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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
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Thought I'd put that back up ^_^
Last reply by thegriffon,
