William Maley

Chevrolet News:2018 Chevrolet Corvette To Sport A 6.2L DOHC V8

166 posts in this topic

William Maley    404

It seems dual overhead cams are making a return to the Corvette in one application. A set of GM service documents made their way on to Reddit sometime this morning. In the documents, there is a 6.2L DOHC V8 with LT5 code. Furthermore, the engine application corresponds to the 2018 Corvette. There isn't any indication of forced-induction being used for this engine.

LT5 holds a special place in Corvette history. This was the code used for the only Corvette to ever feature a DOHC V8, the C4 ZR-1. 

What could this engine be used for? The Drive believes this engine could be used for the mid-engine Corvette since it is a break from the traditional. We're wondering if there could be track-special Corvette that could use this engine.

Source: The Drive, Reddit


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hyperv6    774

Well here is the deal. This is needed for Emissions that need to be met. 

But like with DI there is advantages. 

The reality is there will be more than one version here. I expect a supercharged or Turbo to appear. The Zr1 will see 725-750 HP easy with the added down force. 

It is reported that the new Corvette was testing over 1000 Hp but the un named Corvette person said they would only use what they could put down. 

Now considering that private tuners are already hitting 1000 HP with the present engine emissions legal I tend to believe this to be true. Also the Corvette team has always given as much as they can use. They know large numbers mean little if you can't put them down. 

I also ponder will the Z/28 get this also is this a base for the coming DOHC Cadillac engine?

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smk4565    350

Finally GM entering modern times with a DOHC V8, but why so large?  Cadillac really could use a DOHC V8, but a 6.2 liter is going to get displacement taxed like crazy in other parts of the world.   You'd think there would have to be a turbo version too, I can't imagine any engine without a turbo by about 2022, save for base model 3 or 4 cylinders in sub $20,000 cars.  

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oldshurst442    1,036
2 minutes ago, smk4565 said:

Finally GM entering modern times with a DOHC V8

I HATE THIS ARGUMENT WITH A PASSION!!!!

From wiki: https://en.wikipedia.org/wiki/Overhead_camshaft

 

Quote

 

History

Early use

Among the first cars to utilize engines with single overhead camshafts were the Maudslay designed by Alexander Craig and introduced in 1902[39] and the Marr Auto Car designed by Michigan native Walter Lorenzo Marr in 1903.[40][41] The first DOHC car was the 1912 Peugeot which won the French Grand Prix at Dieppe that year. This car was powered by a straight-4 engine designed by Ernest Henry under the guidance of the technically knowledgeable racing drivers Paul Zuccarelli and Georges Boillot. Boillot, who drove the winning car that year, won the French Grand Prix for Peugeot again in 1913 but was beaten in 1914 by the SOHC Mercedes of Christian Lautenschlager.

 

 

From wiki: https://en.wikipedia.org/wiki/Overhead_valve_engine

Developments

The overhead valve internal combustion engine was invented in 1898, in Detroit, by bicycle manufacturer Walter Lorenzo Marr, who built a motor-trike that year with a one-cylinder OHV engine with a bore and stroke of 3 inches each.[2] In 1900, Marr was hired as chief engineer at the Buick Auto-Vim and Power Company in Detroit, where he worked until 1902. Marr said he got the idea of overhead valves when making the small tricycle engine, because that was the only way he could get the valves to fit.[3] Marr's engine employed pushrod-actuated rocker arms, which in turn pushed valves parallel to the pistons, and this is still in use today. This contrasts with previous designs which made use of side valves and sleeve valves. Marr left Buick briefly to start his own automobile company in 1902, the Marr Auto-Car, and made a handful of cars with overhead valve engines, before coming back to Buick in 1904. The OHV engine was patented in 1902 (awarded 1904) by Buick's second chief engineer Eugene Richard, at the Buick Manufacturing Company, precursor to the Buick Motor Company. The world's first production overhead valve engine was put into the first production Buick automobile, the 1904 Model B, which used a 2-cylinder Flat twin engine, with 2 valves in each head. The engine was of course designed by Marr.

220px-Valve-In-Head_1904_patent.jpg
 
Valve-In-Head engine, illustration from 1904 patent, Buick Manufacturing Company

Eugene Richard of the Buick Manufacturing Company was awarded US Patent #771,095 in 1904 for the valve in head engine. It included rocker arms and push rods, a water jacket for the head which communicated with the one in the cylinder block, and lifters pushed by a camshaft with a 2-to-1 gearing ratio to the crankshaft. Arthur Chevrolet was awarded US Patent #1,744,526 for an adapter that could be applied to an existing engine, thus transforming it into an Overhead Valve Engine.

In 1949, Oldsmobile introduced the Rocket V8. It was the first high-compression I-head design, and is the archetype for most modern pushrod engines. General Motors is the world's largest pushrod engine producer,[citation needed] producing both I4, V6 and V8 pushrod engines.


 

 

 

 

 

MODERN?

What do you mean by modern?

This is such a tired argument.

Only non-car people are allowed to have that opinion of OHC engines being more  modern...

Leaving aside all the state of the art tech behind the GM V8s...I dont ever want to hear this argument from anybody in an automotive forum...EVER!

 

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smk4565    350

I know OHC has been around forever.  Perhaps then my argument would have been better said by saying Finally GM joining the rest of the world in offering a DOHC V8.  Because all the European and Japanese luxury car and performance car companies use DOHC.

 

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Drew Dowdell    5,154

Just because everyone else is doing it doesn't mean GM has to. I like their pushrod V8s, I have no problem with them offering both.  Pushrod has some distinct advantages over DOHC for packaging.   Yes, DOHC may get more horsepower per liter, but pushrod can stuff a lot more liters in there.... and with GM's technology of being able to shut off cylinders, they can get a lot of the efficiency of those smaller displacement engines as well. 

This DOHC 6.2 sounds like it will be great, but that doesn't change the fact that anywhere this engine fits, a S/C pushrod 7.5 - 8 liter would also fit.

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Frisky Dingo    633

This is obviously going to go into a mid-engine Corvette. 

The ZR1 is far too along for it to be receiving this engine. It just doesn't make sense. That said, I do wonder if they would put this in anything other than  a Corvette. I can't see it going in the Z/28 due to cost, but I could see Caddy getting this in a few models.

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hyperv6    774
2 hours ago, Frisky Dingo said:

This is obviously going to go into a mid-engine Corvette. 

The ZR1 is far too along for it to be receiving this engine. It just doesn't make sense. That said, I do wonder if they would put this in anything other than  a Corvette. I can't see it going in the Z/28 due to cost, but I could see Caddy getting this in a few models.

Priced a Z/28?

Coul be under the zr1 hood now. Have you heard one?

This is not a case of doing this beuse everyone else is. This is a case of if you want to meet future emissions you will have to do this.

The flexibility of the timing and extra valves make for more power and  better emissions. 

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Wings4Life(BANNED)    1,000,000

Vette deserves this, and maybe a big Cadillac eventually too.  Not sure a CT6 will accept it, seeing as how this engine is probably twice as big as the 3.0L currently.  They may have planned for it though. But a bespoke engine that will sound and feel far different than any other currently offered by GM, is a welcome addition and I bet many customers are probably craving it.  There simply is no V8 sound as good as a DOHC.  

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smk4565    350

The agree it has more to do emissions, economy and power delivery than it does packaging.  A lot of cars have excess space under the hood anyway.   If packaging was the main priority they could put a 3 liter V6 that revs to 8,000 rpm or something that was more power dense.  Plus you have Lambos and Ferraris with V12s, I don't think space is a big concern.

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Wings4Life(BANNED)    1,000,000
29 minutes ago, smk4565 said:

The agree it has more to do emissions, economy and power delivery than it does packaging.  A lot of cars have excess space under the hood anyway.   If packaging was the main priority they could put a 3 liter V6 that revs to 8,000 rpm or something that was more power dense.  Plus you have Lambos and Ferraris with V12s, I don't think space is a big concern.

Having DOHC grows it a bit in width and very slightly vertically.  No problem at all for a mid mount that does not have to worry about hood clearances.  The more I think about this, the more impressed I am with GM's decision.  

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Drew Dowdell    5,154
4 hours ago, Wings4Life said:

Vette deserves this, and maybe a big Cadillac eventually too.  Not sure a CT6 will accept it, seeing as how this engine is probably twice as big as the 3.0L currently.  They may have planned for it though. But a bespoke engine that will sound and feel far different than any other currently offered by GM, is a welcome addition and I bet many customers are probably craving it.  There simply is no V8 sound as good as a DOHC.  

The CT6 already is slated to have a twin-turbo dohc V8 of around 4 to 5 liters. I doubt getting it to 6.2 without a turbo would be that hard.

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smk4565    350

You don't need 6.2 liters though, if you can't get 500 hp from 4 liters you are doing something wrong.   You can get 600 hp from 4 liters, even.  If one were so inclined they could get 1,000 hp from a 1.6 liter V6 hybrid.

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Drew Dowdell    5,154
8 hours ago, smk4565 said:

You don't need 6.2 liters though, if you can't get 500 hp from 4 liters you are doing something wrong.   You can get 600 hp from 4 liters, even.  If one were so inclined they could get 1,000 hp from a 1.6 liter V6 hybrid.

Sure, if you spin it to 18,000 rpm, but you still have no torque.

And no one is getting 500hp from 4 liters unless there is some forced breathing going on, so as soon as you do that you have additional complications and weight. 

A 6.2 liter will have awesome torque off the line while a turbo 4 liter is still waiting to spool up.

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Expect the new DOHC to easily exceed 750HP. There is ZERO reason to push one out that doesn't considering the cost. The current LT4 can hit 700 with changes made by a shade tree mechanic.

The Caddy DOHC engine will probably be in the 550HP 

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Wings4Life(BANNED)    1,000,000

GM should completely bias this engine for hp, not torque.  I think that is why they are switching to a high revving valve train that can handle it, without going with ridiculously expensive titanium rods.  Now I am not saying it does not need torque, but as light as the vette is, it certainly don't need more than say.....550ftlbs.  It needs to breathe and spin to about 7500rpm's, and a realistic hp of about 650.  Sorry casa, no way will it hit 750hp, and still be an easy car to live with daily and manage decent fuel economy.  And yes, all that matters.

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Drew Dowdell    5,154
3 minutes ago, Wings4Life said:

GM should completely bias this engine for hp, not torque.  I think that is why they are switching to a high revving valve train that can handle it, without going with ridiculously expensive titanium rods.  Now I am not saying it does not need torque, but as light as the vette is, it certainly don't need more than say.....550ftlbs.  It needs to breathe and spin to about 7500rpm's, and a realistic hp of about 650.  Sorry casa, no way will it hit 750hp, and still be an easy car to live with daily and manage decent fuel economy.  And yes, all that matters.

For the mid engine car, absolutely, should be geared towards HP... But I'd like to see a torquer version, lower top rpm but thicker torque band that starts lower, for use in the Escalade and possibly the CT6.

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Wings4Life(BANNED)    1,000,000
1 hour ago, Drew Dowdell said:

For the mid engine car, absolutely, should be geared towards HP... But I'd like to see a torquer version, lower top rpm but thicker torque band that starts lower, for use in the Escalade and possibly the CT6.

Although OHV absolutely does not mean more torque than OHC, I just don't see bothering with a high revving DOHC in a low revving truck application that is all about torque down low. There should be some bespoke-ness to it as well.  Start throwing it into everything, and you optimize it for nothing.

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oldshurst442    1,036
21 hours ago, Wings4Life said:

There simply is no V8 sound as good as a DOHC.  

1. Let me first wish you Merry Xmas in Greek.

KalaXrist.gif

2. Im quite neutral with what you have said, In agreement even with 99.99% of what you wrote, but you know me, I MUST find something you said to pick on!!! Yes, even on XMAS day...even when I have a house full of family and friends!

That quote up above....

 

THIS ONE:

Quote

There simply is no V8 sound as good as a DOHC.  

 

UMMMM....NO!!!!

Although DOHC V8s do sound good....you my dear friend...you come from Detroit even. You my friend, even has a MOPAR...

Let me demonstrate:

 

So....

 

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      The interior focuses squarely on the driver for absolute control in all driving situations. At the same time, the BMW M5 offers space for up to four passengers, a large trunk and excellent ride comfort. As a high-performance sports car and business sedan in one, it blends the best of both worlds.
      The driver is at the heart of the action. Equipment without compromise
      When it comes to the equipment on board the all-new BMW M5, dynamic driving experience is king. The center-point is the driver’s seat, from where all switches and buttons can be operated with optimum ergonomic convenience. All of the car’s functions are located directly in the driver’s eye line. The large digital instrument cluster from the BMW 5 Series has an M-specific design and keeps the driver informed on the driving dynamic mode, M xDrive all-wheel-drive system setting and Drivelogic option currently engaged. Key elements for the sporty driver are the variable rpm pre-warning field and shift lights that show the best time to shift gears. This data can also be reflected into the M-specific Head-Up Display.
      Virtually all of the driving dynamic systems can be configured using the central touchscreen display, buttons on the center console or M sports steering wheel, and the central information display offers BMW Gesture control. The M5’s engine is brought to life by pressing the red starter button. Among the essential features for drivers wanting to customize the driving dynamics are the new two red-painted M1 and M2 buttons next to the gearshift paddles on the M multifunction steering wheel, which allow drivers to configure two individual set-ups. These include their choice of M xDrive, DSC, engine, transmission, damper and steering characteristics, as well as the appearance of M view in the Head-Up Display.
      The all-new BMW M5 is trimmed with Extended Merino leather as standard. The driver and front passenger settle into M Multifunction seats with electric adjustment, seat heating and electric adjustment for the seat depth, and pneumatic backrest width adjustment deliver optimum lateral support. The M Multifunction seats feature integral head restraints that provide even better support in the shoulder area, an illuminated M5 logo and extended functions. With their racing-style bucket shape and the thicker side bolsters of the seat surface and backrest, the M multifunction seats offer even greater lateral support. For the first time, the M5 is now also available with all the driver assistance systems featured in the new BMW 5 Series.
      The all-new BMW M5 is available in a variety of exterior colors, some of which are reserved exclusively for the M5. New additions to the spectrum include Marina Bay Blue Metallic, an intense shade of blue. Inside the car, exclusive aluminum applications with a carbon-structure provide a special sporting flourish.
      The BMW M5 First Edition. Limited-run special edition with exclusive specification
      First come, first served is the motto as BMW M GmbH launches the all-new BMW M5 with the option of a “First Edition” special-edition model limited to a worldwide run of 400 examples with 50 units coming to the US. The 2018 BMW M5 First Edition will be available starting spring of 2018 with pricing announced closer to market launch.
      The all-new BMW M5 First Edition has exclusive Frozen Dark Red Metallic paintwork and includes BMW Individual high-gloss Shadow Line trim with extended features. This means that the kidney grille, the M gills and the four tailpipes of the sports exhaust all come in high-gloss black. The M5 First Edition is fitted as standard with 20-inch seven-double-spoke light-alloy wheels in black.
      The BMW M5 First Edition also has an individual flavor inside. The Piano Finish Black applications are complemented by a plaque on the center console indicating the car’s production number (“M5 First Edition 1/400”), pointing to the exclusivity of this BMW M5. The M5 First Edition comes a
       

      View full article
    • By William Maley
      Whenever there is a new 5-Series, the countdown clock is started for the arrival of high-performance M5. Today, the clock hit zero as BMW unveiled the 2018 M5.
      Under the hood lies a familiar twin-turbo 4.4L V8 with 600 horsepower and 553 pound-feet of torque - healthy increases of 40 and 53 respectively. A new eight-speed automatic is the sole transmission choice, sorry manual lovers. The 2018 M5 also comes with the M xDrive system which can either send power to all four wheels or just the rear wheels if you want to some smoky drifts. 60 mph comes in 3.2 seconds and can hit a top speed of 155 mph (189 mph if you opt for the M Driver's Package).
      BMW has also done a bit of work to the M5's suspension with new wheel bearings, firmer anti-roll bars, and a steel x-brace. 15.5-inch steel rotors with six-piston calipers up front and single-piston calipers in the rear help bring the M5 to a stop. A set of carbon ceramic brakes are available as an option. There has also been a bit of weight loss with aluminum being used for the hood and front fenders and carbon fiber for the roof.
      There is a special edition of the M5 called the First Edition that is limited to 400 models worldwide, with 50 of those coming to the U.S. First Edition models stand out from the standard M5 with Frozen Dark Red Metallic paint, gloss black used on the grille and tailpipes; and a set of 20-inch black wheels.
      The 2018 M5 arrives in the U.S. next spring.
      Source: BMW
      Press Release is on Page 2
      The All-New 2018 BMW M5: The Quintessential High-Performance Sedan
      The 6th generation BMW M5 is the quickest most technologically advanced M-vehicle to date: 0–60 mph in a lightning-quick 3.2 seconds; 0–124 mph in just 11.1 seconds. Top speed: 189 mph with optional M Driver’s Package. The latest generation M TwinPower Turbo technology 4.4-liter V8 engine develops 600 hp and peak torque of 553 lb-ft. Debut of the first ever BMW M xDrive system with 2WD capability. M compound brakes fitted as standard. Available M carbon ceramic brakes provide a 50 lb. unsprung weight reduction. Like all M models, the chassis was honed on the world’s most challenging race circuit, the Nürburgring Nordschleife. Reduced weight by intelligent use of materials such as a carbon fiber reinforced plastic (CFRP) roof and a weight-optimized exhaust system. Exceptional performance both in day-to-day driving and on the racetrack. BMW M5 First Edition with exclusive specification available in limited 50 unit run in the US. Woodcliff Lake, NJ – August 21, 2017… Today, BMW unveiled the all-new 2018 BMW M5, a car that since 1984 has been regarded as the quintessential high-performance sports sedan. The previous generations of the BMW M5 all possess purebred racing genes and acquitted themselves impressively on the racetrack as well as on the road. The all-new BMW M5 represents the 6th generation and, like those that have come before it, delivers on these promises – and more. The all-new 2018 M5 will also debut the M-specific all-wheel-drive system, M xDrive. This new system allows the M5 to reach new heights of dynamic performance and delivers poise in all driving situations. Frank van Meel, Chairman of the Board of Management at BMW M GmbH, explains the benefits of this pioneering drivetrain technology: “Thanks to M xDrive, the all-new BMW M5 can be piloted with the familiar blend of sportiness and unerring accuracy both on the racetrack and out on the open road, while also delighting drivers with its significantly enhanced directional stability and controllability right up to the limits of performance when driving in adverse conditions such as on wet roads or snow.” When the engine is first started, the all-new BMW M5 will be in all-wheel-drive mode (4WD) with Dynamic Stability Control (DSC) turned on. The driver is then able to vary the handling characteristics of the M5 by enabling various driving dynamics modes, including a rear-wheel-drive mode with no DSC. In this 2WD mode, the all-new BMW M5 offers drivers the opportunity to experience BMW’s traditional rear-wheel drive characteristics.
      Under the hood of the all-new BMW M5 is the latest and most advanced version of the renowned 4.4-liter V8 engine featuring M TwinPower Turbo technology with an output increase from the previous generation of 40 hp and 53 lb-ft, this new engine develops 600 hp and 553 lb-ft of peak torque to promise explosive acceleration and formidable performance. The twin-turbo V8 unit propels the M5 via the new 8-speed M Steptronic transmission with Drivelogic and teams up with the M xDrive system to transfer all of the high-revving turbocharged engine’s might to the road, and allows a 0–60 mph acceleration run in a mere 3.2 seconds, making it the quickest and most agile to date.
      The all-new 2018 BMW M5 will be available at certified BMW Centers in spring 2018 with pricing to be announced closer to market launch.
      M TwinPower Turbo, M xDrive and the 8-speed M Steptronic transmission
      The all-new BMW M5 features a 4.4-liter V8 engine with M TwinPower Turbo technology. The high-revving power unit in the all-new BMW M5 has received a thorough overhaul and delivers its exceptional output of 600 hp from 5,700 to 6,600 rpm, while the tremendous peak torque of 553 lb-ft is on tap from just 1,800 rpm and remains constant all the way up to 5,700 rpm. The engine characteristics can be changed at the push of a button from the basic Efficient setting to either Sport or Sport Plus, resulting in a more crisp response to movements of the accelerator.
      The M engineers have implemented a raft of enhancements to endow the twin-turbo V8 with its phenomenal performance capabilities. These include newly developed twin-scroll turbochargers now delivering 24.46 psi of relative boost pressure as well as a higher maximum injection pressure of 350 bar (up from 200 bar). This allows shorter injection times and improved atomization of the fuel for sharper engine response as well as more efficient mixture preparation. Improvements have also been made to the lubrication and cooling systems, including an oil pan with a small front sump and new indirect charge air cooling units, which are more effective than its predecessor despite being almost 20% smaller in size. The oil supply system uses a fully variable, map-controlled pump and has been designed for weekend escapades to the racetrack, where it can handle very high levels of longitudinal and lateral acceleration.
      The cross-bank exhaust manifolds for the all-new BMW M5 have also been modified to optimize the flow of energy from the exhaust gas to the turbine wheels of the two twin-scroll turbochargers ensuring the best possible gas-exchange cycle. By fitting a Helmholtz resonator between the two silencers of the dual exhaust system, the M engineers have reduced its weight by 11 lbs. The sound from the active flap-controlled exhaust system varies depending on the selected mode for the engine characteristics, while the M Sound Control button allows further acoustic customization.
      The twin-scroll twin-turbo V8’s power is channeled to the road via the newly developed M xDrive all-wheel-drive system. The rear-biased set-up ensures that the front wheels only come into play when the rear wheels are not able to transmit any more torque to the road and additional tractive force is required. The main hardware components of M xDrive are based on the BMW xDrive intelligent all-wheel-drive system and the Active M Differential technology. Central M specific driving dynamics control software precisely to orchestrate the various components, providing enhanced traction, agility and directional stability at all times.
      The reinforced drivetrain allows it to cope with the higher torque, the rear-biased configuration and the 2WD mode. While the transfer case intelligently splits the drive torque between the front and rear wheels, the Active M Differential is responsible for then distributing the drive flow between the rear wheels varying the locking effect as the situation demands. With M xDrive, stabilizing interventions from the DSC system are only required in extreme situations, enabling the engine’s tremendous power to be converted into propulsive force with virtually zero losses. The M xDrive system allows drivers to command the all-new BMW M5 with even greater precision and directional accuracy to respond sensitively and directly to the driver’s inputs, which in turn enable fewer steering corrections when driving at the limit.
      Drivers can configure M xDrive at any time to suit their needs. Even in the default setting with both DSC and 4WD activated, the all-new BMW M5 allows a certain amount of slip at the rear wheels when accelerating out of corners to produce the agility for which M models are renowned while remaining perfectly controllable at all times. The all-wheel drive’s traction helps to produce acceleration times that are worthy of super-sports cars: 0–60 mph in a breathtaking 3.2 seconds and 0–124 mph in just 11.1 seconds.
      Switching to the M Dynamic mode (MDM, 4WD Sport) gives additional boost to the car’s handling agility. In this mode, more drive torque is directed to the rear axle, while the amount of permissible rear wheel slip is increased. While doing so, the onset of oversteer is noticeable in good time and the linear increase of the sideslip angle means that the vehicle remains stable.
      The three modes available with the DSC system switched off have been configured keeping track driving in mind. The 4WD mode is set up for the greatest possible controllability and traction, and already offers plenty of scope for exploring the dynamic performance capabilities of the all-new BMW M5. The 4WD Sport mode, meanwhile, with its blend of steering precision, agile handling and reassuring traction, guarantees maximum enjoyment and consistent lap times. The pure rear-wheel-drive mode (2WD) has been designed with the experienced and highly skilled driver in mind. This opens up the same thrilling experience already offered by past generations of the M5.
      The new 8-speed M Steptronic transmission with Drivelogic has been strictly geared towards high-performance duty while the wide ratio spread helps to optimize fuel efficiency. The transmission has been engineered so the torque converter lock-up clutch fully engages once the car has pulled away, proving instantaneous response. Lightning-fast gear changes with optimal gear ratio spacing ensure that even the most demanding driver will appreciate its technological prowess. The driver can choose between fully automatic shifting in D mode, or opt for sequential gearshifts via the new short gear selector on the center console or the M shift paddles on the steering wheel.
      The transmission’s shift mapping can be modified using the Drivelogic rocker switch in the gear selector. Drivelogic mode 1 corresponds to efficient driving. Mode 2 lends itself to sporty driving with its shortened shift times. Drivelogic mode 3 is optimized for high-sporty driving on the track thanks to its extremely short shift times. Those preferring to shift gears manually can also execute multiple downshifts to the lowest available gear, for instance when braking into tight corners. With manual mode engaged, there are no automatic upshifts when the engine is revved to the limit either. A transmission oil cooler ensures flawless transmission operation even when the car is put through its paces on the track.
      Newly Developed chassis technology. A new benchmark in driving dynamics
      The goal of the team responsible for tuning the all-new BMW M5 chassis was to achieve unbeatable driving dynamics with maximum directional stability. As is usual for BMW M GmbH, the tuning took place in part on the company’s own race circuit at Miramas in the south of France, as well as on the world’s toughest test track, the Nürburgring Nordschleife.
      The precise, agile handling that drivers have come to expect from previous generations of the M5 has been optimized for the all-new car. Individual driver needs are met by the wide range of options for configuring the vehicle, including M xDrive, the 8-speed M Steptronic with Drivelogic, the M-specific Variable Damper Control (incl. three driving modes: Comfort, Sport and Sport Plus) with electronically controlled shock absorbers, and M Servotronic steering (incl. three driving modes: Comfort, Sport and Sport Plus). A top priority when tuning the chassis of the all-new BMW M5 was to achieve neutral steering behavior with linear build-up of transverse loads across the full range of lateral acceleration. Whatever the driving situation, the electromechanical M Servotronic steering delivers exactly the right amount of steering torque. This ensures that the all-new BMW M5 has accurate steering and always communicates clear feedback to the driver. What’s more, because of all of these systems the car is great for long-distance driving or touring along the city thanks to the low steering force required for maneuvering and parking.
      The familiar double-wishbone suspension from the front axle of the BMW 5 Series has been reworked from the ground up for the all-new BMW M5 with M xDrive. M engineers have redesigned every component to factor in M-specific kinematic and elastokinematic characteristics. Directional stability is greater than ever thanks to the increased track width. The five-link rear suspension has also been modified to meet M-specific requirements. Optimized firmer anti-roll bars and new toe links featuring stiffer rubber mounts help accommodate the increased demands on the driving dynamics and steering precision. Specially developed for the M5, the elastomer bearings on the rear axle mounts ensure that there is no delay in transferring chassis forces, which makes for direct handling. An additional steel X-brace and an aluminum transverse strut increase the stiffness of the chassis linkages at the rear axle, resulting in improved response. Additional chassis modifications not visible externally perform functions that are no less important. For example, an aluminum tower-to-bulkhead and tower-to-frontend strut braces enhance stiffness at the front of the car.
      The complete chassis and powertrain package put together by the BMW M engineers is so detailed that even experienced racers like former Formula One star and BMW works driver Timo Glock are impressed: “Thanks to M xDrive, the new BMW M5 goes beyond the precise, agile drive that we’ve come to expect – it also serves up a noticeable boost in traction and controllability, both in everyday situations and at the dynamic limit.”
      The tires fitted as standard on the all-new BMW M5 (275/40 R 19 at the front and 285/40 R 19 at the rear) have been specially homologated for this vehicle. They are mounted on five-double-spoke cast light-alloy wheels in polished Orbit Grey (front: 9.5 J x 19, rear: 10.5 J x 19). 20-inch seven-double-spoke wheels in black or polished black are available as an option (front: 275/35 R 20, at rear: 285/35 R 20). All wheels are ZR speed rated, making them suitable for the 189 mph top speed achieved with the available M Driver’s Package (155 mph standard).
      The all-new BMW M5 comes with M compound brakes fitted as standard. Being significantly lighter than conventional cast iron units, these have the distinct benefit of reducing unsprung mass. At the front, the braking force is applied to 15.55 x 1.41 [in] perforated, inner-vented brake discs by blue-painted 6-piston fixed calipers featuring the M logo. Single-piston floating caliper brakes see duty at the rear on 14.96 x 1.10 [in] perforated, inner-vented brake discs, with integrated parking brake.
      M carbon-ceramic brakes are also available as an option on the all-new BMW M5. These brakes are instantly recognizable from the gold-colored calipers with M logo 6-piston fixed calipers and 15.74 x 1.49 [in] ventilated brake discs at front; single-piston floating calipers and 14.96 x 1.10 [in] ventilated brake discs at rear, resulting in 50.7 lb reduction of unsprung and rotating masses. This offers many benefits, including improved driving dynamics and increased suspension comfort. More importantly, the M carbon-ceramic brakes provide even better braking performance than M compound brakes, as well as improved fade resistance and even higher thermal stability.
      Sporting M design with distinction. Form driven by function
      “The BMW M5 has always embodied the perfect blend of mature business sedan and high-performance components. So you can think of the BMW M5 as the world’s fastest-moving tailored suit.” These are the words chosen by Domagoj Dukec, Vice President of Design BMW i and BMW M, to sum up the brief for the all-new BMW M5. Like all the models to come out of BMW M GmbH HQ in Garching, its design is M-specific and driven by function. For example, the newly designed front bumper trim, with its larger air intakes, has the task of providing the cooling systems and brakes with the adequate supply of cooling air – even in rigorous use on the racetrack. The car has a wider track than its predecessor, and the front side panels (made from aluminum to reduce weight) bear the signature M gills.
      Also carved from aluminum is the hood, whose precise lines create an eye-catching sculpture and extend visually into the roof. For the first time in the BMW M5, the roof itself is made from extremely lightweight, high-strength carbon fiber-reinforced plastic (CFRP).
      The redesigned rear diffuser, side skirts, the M rear apron and M rear spoiler, play their part in giving the all-new BMW M5 its powerful sporting appearance, and the exterior mirrors have a dynamic, M-specific design. In another example of form following function, the hexagonal central air intake in the front end not only separates itself sculpturally from the side air intakes, it also incorporates the oil cooler.
      The interior focuses squarely on the driver for absolute control in all driving situations. At the same time, the BMW M5 offers space for up to four passengers, a large trunk and excellent ride comfort. As a high-performance sports car and business sedan in one, it blends the best of both worlds.
      The driver is at the heart of the action. Equipment without compromise
      When it comes to the equipment on board the all-new BMW M5, dynamic driving experience is king. The center-point is the driver’s seat, from where all switches and buttons can be operated with optimum ergonomic convenience. All of the car’s functions are located directly in the driver’s eye line. The large digital instrument cluster from the BMW 5 Series has an M-specific design and keeps the driver informed on the driving dynamic mode, M xDrive all-wheel-drive system setting and Drivelogic option currently engaged. Key elements for the sporty driver are the variable rpm pre-warning field and shift lights that show the best time to shift gears. This data can also be reflected into the M-specific Head-Up Display.
      Virtually all of the driving dynamic systems can be configured using the central touchscreen display, buttons on the center console or M sports steering wheel, and the central information display offers BMW Gesture control. The M5’s engine is brought to life by pressing the red starter button. Among the essential features for drivers wanting to customize the driving dynamics are the new two red-painted M1 and M2 buttons next to the gearshift paddles on the M multifunction steering wheel, which allow drivers to configure two individual set-ups. These include their choice of M xDrive, DSC, engine, transmission, damper and steering characteristics, as well as the appearance of M view in the Head-Up Display.
      The all-new BMW M5 is trimmed with Extended Merino leather as standard. The driver and front passenger settle into M Multifunction seats with electric adjustment, seat heating and electric adjustment for the seat depth, and pneumatic backrest width adjustment deliver optimum lateral support. The M Multifunction seats feature integral head restraints that provide even better support in the shoulder area, an illuminated M5 logo and extended functions. With their racing-style bucket shape and the thicker side bolsters of the seat surface and backrest, the M multifunction seats offer even greater lateral support. For the first time, the M5 is now also available with all the driver assistance systems featured in the new BMW 5 Series.
      The all-new BMW M5 is available in a variety of exterior colors, some of which are reserved exclusively for the M5. New additions to the spectrum include Marina Bay Blue Metallic, an intense shade of blue. Inside the car, exclusive aluminum applications with a carbon-structure provide a special sporting flourish.
      The BMW M5 First Edition. Limited-run special edition with exclusive specification
      First come, first served is the motto as BMW M GmbH launches the all-new BMW M5 with the option of a “First Edition” special-edition model limited to a worldwide run of 400 examples with 50 units coming to the US. The 2018 BMW M5 First Edition will be available starting spring of 2018 with pricing announced closer to market launch.
      The all-new BMW M5 First Edition has exclusive Frozen Dark Red Metallic paintwork and includes BMW Individual high-gloss Shadow Line trim with extended features. This means that the kidney grille, the M gills and the four tailpipes of the sports exhaust all come in high-gloss black. The M5 First Edition is fitted as standard with 20-inch seven-double-spoke light-alloy wheels in black.
      The BMW M5 First Edition also has an individual flavor inside. The Piano Finish Black applications are complemented by a plaque on the center console indicating the car’s production number (“M5 First Edition 1/400”), pointing to the exclusivity of this BMW M5. The M5 First Edition comes a
       
    • By William Maley
      If you're a truck manufacturer and have decided to build an off-road special, sooner or later you will be entering it a desert race to prove its merit. Ford and Toyota have done it with their respective models, and soon Chevrolet will be joining this crowd with the Colorado ZR2.
      The truck seen here was developed and built by Hall Racing. Competing in the Best in the Desert’s General Tire “Vegas to Reno” (the longest off-road race in the U.S), the Colorado ZR2 will be in class 7300, reserved for stock mid-size trucks and SUVs. 'Stock' carries a different meaning in racing as the ZR2 has some modifications for the race such as a rollcage, racing seats and harnesses; 44-gallon fuel tank, and additional lighting.
      Otherwise, most of the mechanical bits such as the 3.6L V6, eight-speed automatic, front and rear locking differentials, and the stock wheels. The Multimatic spool valve shocks have been tweaked, but Chevrolet doesn't mention how. The truck will also be acting as test bed for possible new parts for the ZR2 and regular Colorado from Chevrolet Performance.
      Source: Chevrolet
      Press Release is on Page 2


      COLORADO ZR2 MAKES COMPETITION DEBUT IN AMERICA’S LONGEST OFF-ROAD RACE
      Hall Racing to compete in stock-class with ZR2 in Best in the Desert Racing series LAS VEGAS — Chad Hall of Hall Racing will debut a modified 2017 production Chevrolet Colorado ZR2 during Best in the Desert’s General Tire “Vegas to Reno” race presented by FOX.
       “Vegas to Reno,” known as “the longest off-road race in the United States,” begins at 9:30 a.m. on Friday in Las Vegas and ends at various times on Saturday morning, August 19, in Reno, Nevada. More than 350 contestants are expected to participate this year’s 550-mile race.
      The course encompasses a wide array of grueling terrain, from silty desert wallows, to dry lake beds and mountain passes as high as 8,000 ft. above sea level.
      Entered in class 7300, which comprises stock production mid-sized pick-ups and SUVs, Hall Racing’s modifications to their ZR2 include sanctioning body-mandated safety items such as a roll cage, a 44-gallon racing fuel tank and racing seats with safety harnesses. KC HiLites racing lights, two-way radios and a GPS system have also been added.
      The truck retains the stock ZR2’s 3.6L V-6 engine and eight-speed automatic transmission, along with a modified version of ZR2’s Multimatic DSSVTM damper technology.
      In addition to Hall Racing’s alterations, this crew cab ZR2 acts a testbed for Chevy Performance and hints at a range of potential parts to be offered for ZR2 as well as the standard Colorado.
      “The components being tested on this truck are ultimately intended to take the already-exceptional off-road capability of the Colorado to the next level,” said Russ O’Blenes, director, Performance Variants, Parts and Motorsports for General Motors.
      “Racing them allows us to quickly understand their performance attributes and reliability in the extreme environment of off-road racing, ensuring the highest performing components for Colorado customers.”
      Hall Racing, the winningest family of off-road racers in the legendary Baja 1000, has a long history of racing with General Motors production-based vehicles in both Best in the Desert and SCORE desert series.
      “The Colorado ZR2 is one of the most capable production platforms we’ve used as a foundation for our racing program,” said Chad Hall. “The base Colorado is strong and robust with the expected advantages of a midsize package. ZR2 adds great technology, like the Multimatic DSSVTM dampers and the front and rear locking differentials that are vital to stock class desert racing.”
      The 2018 Colorado ZR2 is effectively a segment of one, combining the nimbleness and maneuverability of a midsize pickup with a host of new off-road features and the most off-road technology of any vehicle in its segment.
      Compared to a standard Colorado, the ZR2 features front and rear tracks that have been widened by 3.5 inches and a suspension lifted by two inches. Functional rockers have been added for better performance over rocks and obstacles, and the front and rear bumpers have been modified for better off-road clearance.
      Class-exclusive features include standard front and rear electronic locking differentials, available diesel engine and the first off-road application of Multimatic Dynamic Suspensions Spool Valve (DSSVTM) damper technology.
      As with all Chevrolet trucks, the Colorado ZR2 is built with durability in mind, including a fully boxed frame, roll-formed high-strength steel bed and Duralife brake rotors.

      View full article
    • By William Maley
      If you're a truck manufacturer and have decided to build an off-road special, sooner or later you will be entering it a desert race to prove its merit. Ford and Toyota have done it with their respective models, and soon Chevrolet will be joining this crowd with the Colorado ZR2.
      The truck seen here was developed and built by Hall Racing. Competing in the Best in the Desert’s General Tire “Vegas to Reno” (the longest off-road race in the U.S), the Colorado ZR2 will be in class 7300, reserved for stock mid-size trucks and SUVs. 'Stock' carries a different meaning in racing as the ZR2 has some modifications for the race such as a rollcage, racing seats and harnesses; 44-gallon fuel tank, and additional lighting.
      Otherwise, most of the mechanical bits such as the 3.6L V6, eight-speed automatic, front and rear locking differentials, and the stock wheels. The Multimatic spool valve shocks have been tweaked, but Chevrolet doesn't mention how. The truck will also be acting as test bed for possible new parts for the ZR2 and regular Colorado from Chevrolet Performance.
      Source: Chevrolet
      Press Release is on Page 2


      COLORADO ZR2 MAKES COMPETITION DEBUT IN AMERICA’S LONGEST OFF-ROAD RACE
      Hall Racing to compete in stock-class with ZR2 in Best in the Desert Racing series LAS VEGAS — Chad Hall of Hall Racing will debut a modified 2017 production Chevrolet Colorado ZR2 during Best in the Desert’s General Tire “Vegas to Reno” race presented by FOX.
       “Vegas to Reno,” known as “the longest off-road race in the United States,” begins at 9:30 a.m. on Friday in Las Vegas and ends at various times on Saturday morning, August 19, in Reno, Nevada. More than 350 contestants are expected to participate this year’s 550-mile race.
      The course encompasses a wide array of grueling terrain, from silty desert wallows, to dry lake beds and mountain passes as high as 8,000 ft. above sea level.
      Entered in class 7300, which comprises stock production mid-sized pick-ups and SUVs, Hall Racing’s modifications to their ZR2 include sanctioning body-mandated safety items such as a roll cage, a 44-gallon racing fuel tank and racing seats with safety harnesses. KC HiLites racing lights, two-way radios and a GPS system have also been added.
      The truck retains the stock ZR2’s 3.6L V-6 engine and eight-speed automatic transmission, along with a modified version of ZR2’s Multimatic DSSVTM damper technology.
      In addition to Hall Racing’s alterations, this crew cab ZR2 acts a testbed for Chevy Performance and hints at a range of potential parts to be offered for ZR2 as well as the standard Colorado.
      “The components being tested on this truck are ultimately intended to take the already-exceptional off-road capability of the Colorado to the next level,” said Russ O’Blenes, director, Performance Variants, Parts and Motorsports for General Motors.
      “Racing them allows us to quickly understand their performance attributes and reliability in the extreme environment of off-road racing, ensuring the highest performing components for Colorado customers.”
      Hall Racing, the winningest family of off-road racers in the legendary Baja 1000, has a long history of racing with General Motors production-based vehicles in both Best in the Desert and SCORE desert series.
      “The Colorado ZR2 is one of the most capable production platforms we’ve used as a foundation for our racing program,” said Chad Hall. “The base Colorado is strong and robust with the expected advantages of a midsize package. ZR2 adds great technology, like the Multimatic DSSVTM dampers and the front and rear locking differentials that are vital to stock class desert racing.”
      The 2018 Colorado ZR2 is effectively a segment of one, combining the nimbleness and maneuverability of a midsize pickup with a host of new off-road features and the most off-road technology of any vehicle in its segment.
      Compared to a standard Colorado, the ZR2 features front and rear tracks that have been widened by 3.5 inches and a suspension lifted by two inches. Functional rockers have been added for better performance over rocks and obstacles, and the front and rear bumpers have been modified for better off-road clearance.
      Class-exclusive features include standard front and rear electronic locking differentials, available diesel engine and the first off-road application of Multimatic Dynamic Suspensions Spool Valve (DSSVTM) damper technology.
      As with all Chevrolet trucks, the Colorado ZR2 is built with durability in mind, including a fully boxed frame, roll-formed high-strength steel bed and Duralife brake rotors.
    • By William Maley
      Chevrolet will be introducing a new base model of the 2018 Tahoe called the Custom. The Custom sets itself apart from other Tahoes as it will not have a third-row seat, increasing cargo space to 54 cubic feet. Standard equipment includes 18-inch wheels, 8-inch touchscreen with Apple CarPlay and Android Auto compatibility, OnStar 4G LTE with Wi-Fi, backup camera, and remote start.
      Like most Tahoes, the Custom features the 5.3L V8 with 355 horsepower. Out of the box, the Tahoe Custom can tow up to 6,600 pounds. An optional max trailering package boosts that to 8,600 pounds.
      “The Tahoe Custom is a response to strong customer demand for Tahoe, as well as the full-size SUV segment moving upmarket. In the past five years, the average transaction price for the segment has climbed fueled by customer appetite for features like heated and cooled seats, adaptive cruise control and a head-up display. This created an unmet need in the marketplace for customers who want the cargo and towing capability of a full-size SUV to go camping, boating or off-roading but don’t necessarily want all of the option content offered on a Tahoe Premier,” said Sandor Piszar, Chevrolet Trucks marketing director in a statement.
      The 2018 Tahoe Custom arrives at dealers next month with a base price of $44,995.
      Source: Chevrolet
      Press Release is on Page 2


      CHEVROLET INTRODUCES THE TAHOE CUSTOM
      New model offers Tahoe’s legendary capability starting at $44,995 DETROIT — Today Chevrolet announced the new Tahoe Custom special edition for the 2018 model year. Like other Custom models, the Tahoe Custom is intended for buyers who want the uncompromised capability of Chevrolet trucks and SUVs in a great looking package at an outstanding value.
      “The Tahoe Custom is a response to strong customer demand for Tahoe, as well as the full-size SUV segment moving upmarket,” said Sandor Piszar, Chevrolet Trucks marketing director. “In the past five years, the average transaction price for the segment has climbed fueled by customer appetite for features like heated and cooled seats, adaptive cruise control and a head-up display. This created an unmet need in the marketplace for customers who want the cargo and towing capability of a full-size SUV to go camping, boating or off-roading but don’t necessarily want all of the option content offered on a Tahoe Premier.”
      For $44,995, the 2018 Tahoe Custom comes standard with 6,600 pounds of towing capacity (up to 8,600 pounds of towing with max trailering package), a maximum of 112 cubic feet of cargo space and a 355-hp, 5.3L V-8 engine that delivers an expected segment-leading 23 mpg highway based on EPA estimates.
      The Tahoe Custom is based on the LS trim and adds 18-inch painted aluminum wheels, all-season tires and a chrome-accented grille. Plus, Tahoe Custom features a third-row seat that has been removed, increasing cargo space behind the second row to a substantial 54 cubic feet for added utility.
      Tahoe Custom also features a suite of connectivity technologies including:
      Apple CarPlay & Android Auto compatibility 4G LTE connectivity with Wi-Fi hotspot (includes three-month/3G data trial) 8-inch color touchscreen radio Standard rear-vision camera Standard remote start Standard teen driver mode Available Enhanced Driver Alert Package that features Forward Collision Alert, Safety Alert Driver Seat, IntelliBeam headlamps with automatic high-beam control, Lane Keep Assist and Low Speed Forward Automatic Braking Up to five USB ports and five power outlets — including a 110-volt three-prong outlet —  to support electronic devices of all kinds (up to 11 charging locations) Tahoe Custom will be available at Chevy dealers in September 2017.

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