GM Twin Turbo DOHC. - ZR-1 Net Registry Forums

cvette98pacecar · 07-27-2014

Has anyone besides me been following the TT DOHC engine that is already available in the Cadillac XTS for 2014 and CTS in 2016.
The LT5 may be coming back to GM. If they are utilizing a Twin Turbo DOHC 6 cylinder in a current model Cadillac will the future CTS-V and Corvette ZR1 be a TT DOHC 8 Cylinder?

http://media.cadillac.com/media/us/e...win-turbo.html

Z06scentair · 07-27-2014

Believe you are right on track!

XfireZ51 · 07-28-2014

Bob,

Suppose they did this as a hybrid? Electric motors for AWD. BTW, Audi has announced electric turbos. It was just a matter of time.

http://www.autocar.co.uk/car-news/mo...ger-technology

Hog · 07-28-2014

No I dont see GM doing a DOHC V8 again, V8's of any type will be a rarity in the future.

cvette98pacecar · 07-28-2014

Quote:

Originally Posted by Hog

No I dont see GM doing a DOHC V8 again, V8's of any type will be a rarity in the future.

IMO I don't think GM will ever get rid of the 8 cylinder engine. How many work trucks and vans on the road. And as long as they have to build an 8 cylinder engine for a truck why not add the high horsepower versions for performance cars.

Quote:

Originally Posted by XfireZ51

Bob,

Suppose they did this as a hybrid? Electric motors for AWD. BTW, Audi has announced electric turbos. It was just a matter of time.

http://www.autocar.co.uk/car-news/mo...ger-technology

The Mercedes Benz SLS electric is faster than the petro version in a quarter mile. Okay so you can only drive the electric car for 7 minutes than utilize the gas engine to recharge the batteries.

Quote:

Originally Posted by Z06scentair

Believe you are right on track!

I talked with Graham Behan at BG the LPE supercharged C7 hardware upgrades are supercharger, cam and a fuel pump. The HP has to be North of 700. Graham would not give me a real number as no racer will ever tell you the true HP.

XfireZ51 · 07-28-2014

Bob,

I think what you'll see is the IC motor being decoupled from the drivetrain. That will migrate to electric drive IMO. As with other technology, it is migrating from hardware to software for controls and modifications.
This is a case of discontinuous innovation that trumps current state technology.
Just a matter of time.

1. All the torque you want NOW!
2. Infinitely variable torque application.
3. Less complex and lighter drivetrain
4. No reduction in power due to atmospheric changes or conditions.

This Race Up Pikes Peak Will Change The Way You See Electric Vehicles - YouTube

LGAFF · 07-28-2014

3. Less complex and lighter drivetrain
4. No reduction in power due to atmospheric changes or conditions.

To me, seeing teams overcome these types of variables are what makes racing exciting and fun...

Between this and driverless cars...might as well buy a slot car set....I know I might be in the minority...but I would rather hear the roar of an engine

Hog · 07-28-2014

[QUOTE=cvette98pacecar;208308]IMO I don't think GM will ever get rid of the 8 cylinder engine. How many work trucks and vans on the road. And as long as they have to build an 8 cylinder engine for a truck why not add the high horsepower versions for performance cars.
QUOTE]
That is a possibility. We'll have to wait and see.

There certainly are multitudes of work trucks/vans on the road.

GM will probably reserve V8 engines for the rare performance platforms.

Xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

Some cool videos

Twin Turbo 3.6l Cadillac 420hp@5750 rpm/369lb/ft@ 3500-4500 rpm on the engine tilt table. They sureltest at some extreme angles.
https://www.youtube.com/watch?v=jAuw49TWT80

2014 twin turbo V6 Cadillac on chassis dyno
https://www.youtube.com/watch?v=tLX9sDzWoC8

Animated V6 3.6 engine assembly
https://www.youtube.com/watch?v=8LKB6fBYVaw

Working on cam chains
https://www.youtube.com/watch?v=3USSOvAxGgE

mike100 · 07-28-2014

No V8 will be directly derived from the twin-turbo cadillac V6 as that block is a narrow 'v' 60 degree v6 and V8's will be at a 90 degree bank angle.

I think a dohc V8 would have to be a clean sheet design and would cost GM plenty. If it isn't in trucks, it won't get the volume they want for economies of scale.

Mystic ZR-1 · 07-28-2014

Quote:

Originally Posted by mike100

No V8 will be directly derived from the twin-turbo cadillac V6 as that block is a narrow 'v' 60 degree v6 and V8's will be at a 90 degree bank angle.

I think a dohc V8 would have to be a clean sheet design and would cost GM plenty. If it isn't in trucks, it won't get the volume they want for economies of scale.

A narrow angle V6 would be like my VW R32, 15 degrees (VR6)
One head for both banks.. Hope I never have to replace it...

The Bugatti Veyron W16 is derived from this engine.
Mine's missing 10 cylinders and about 800 horsepower.

07-27-2014	#1
cvette98pacecar Join Date: May 2011 Location: Sydney, Australia Posts: 2,479	GM Twin Turbo DOHC. Has anyone besides me been following the TT DOHC engine that is already available in the Cadillac XTS for 2014 and CTS in 2016. The LT5 may be coming back to GM. If they are utilizing a Twin Turbo DOHC 6 cylinder in a current model Cadillac will the future CTS-V and Corvette ZR1 be a TT DOHC 8 Cylinder? http://media.cadillac.com/media/us/e...win-turbo.html __________________ Robert J. DeMarco [SIGPIC][/SIGPIC] [COLOR=blue]G[/COLOR][COLOR=red]rand[/COLOR] [COLOR=blue]S[/COLOR][COLOR=red]port[/COLOR] Registry Lifetime Member NCM Lifetime Member #2655 Pacecar Registry Member [COLOR=red]ZOOM Charter Member - ZR-1 Owners of Michigan[/COLOR] [COLOR=plum][I]ZR-1[/I] Registry member since 2012 [/COLOR] [COLOR=black]1990 LPE "368" Aerobody ZR-1, Last ZR-1 built by John[/COLOR] 1991 Callaway Aerobody ZR-1, DRM 500 1991 Shinoda Aerobody Spyder, 1998 Pace Car

07-27-2014	#2
Z06scentair Join Date: Sep 2013 Location: Charlotte NC Posts: 655	Re: GM Twin Turbo DOHC. Believe you are right on track!

07-28-2014	#3
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,708	Re: GM Twin Turbo DOHC. Bob, Suppose they did this as a hybrid? Electric motors for AWD. BTW, Audi has announced electric turbos. It was just a matter of time. http://www.autocar.co.uk/car-news/mo...ger-technology __________________ [SIGPIC][/SIGPIC]Former Membership Chairman Former ZR-1 Registry - BOD 1972 Corvette 4speed base Coupe SOLD long time ago 1984 Corvette Z-51/4+3 SOLD 1992 Corvette ZR-1 Aqua/Gray #474 SOLD 1992 Corvette ZR-1 Black Rose/Cognac #458 2014 Honda VFR Interceptor DX

07-28-2014	#4
Hog Join Date: Jul 2010 Location: Woodstock, Ontario, Canada Posts: 1,275	Re: GM Twin Turbo DOHC. No I dont see GM doing a DOHC V8 again, V8's of any type will be a rarity in the future. __________________ peace Paul ZR-1 Net Registry Member #1494

07-28-2014	#6
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,708	Re: GM Twin Turbo DOHC. Bob, I think what you'll see is the IC motor being decoupled from the drivetrain. That will migrate to electric drive IMO. As with other technology, it is migrating from hardware to software for controls and modifications. This is a case of discontinuous innovation that trumps current state technology. Just a matter of time. 1. All the torque you want NOW! 2. Infinitely variable torque application. 3. Less complex and lighter drivetrain 4. No reduction in power due to atmospheric changes or conditions. This Race Up Pikes Peak Will Change The Way You See Electric Vehicles - YouTube __________________ [SIGPIC][/SIGPIC]Former Membership Chairman Former ZR-1 Registry - BOD 1972 Corvette 4speed base Coupe SOLD long time ago 1984 Corvette Z-51/4+3 SOLD 1992 Corvette ZR-1 Aqua/Gray #474 SOLD 1992 Corvette ZR-1 Black Rose/Cognac #458 2014 Honda VFR Interceptor DX

07-28-2014	#7
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,194	Re: GM Twin Turbo DOHC. 3. Less complex and lighter drivetrain 4. No reduction in power due to atmospheric changes or conditions. To me, seeing teams overcome these types of variables are what makes racing exciting and fun... Between this and driverless cars...might as well buy a slot car set....I know I might be in the minority...but I would rather hear the roar of an engine __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359

07-28-2014	#8
Hog Join Date: Jul 2010 Location: Woodstock, Ontario, Canada Posts: 1,275	Re: GM Twin Turbo DOHC. [QUOTE=cvette98pacecar;208308]IMO I don't think GM will ever get rid of the 8 cylinder engine. How many work trucks and vans on the road. And as long as they have to build an 8 cylinder engine for a truck why not add the high horsepower versions for performance cars. QUOTE] That is a possibility. We'll have to wait and see. There certainly are multitudes of work trucks/vans on the road. GM will probably reserve V8 engines for the rare performance platforms. Xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx Some cool videos Twin Turbo 3.6l Cadillac 420hp@5750 rpm/369lb/ft@ 3500-4500 rpm on the engine tilt table. They sureltest at some extreme angles. https://www.youtube.com/watch?v=jAuw49TWT80 2014 twin turbo V6 Cadillac on chassis dyno https://www.youtube.com/watch?v=tLX9sDzWoC8 Animated V6 3.6 engine assembly https://www.youtube.com/watch?v=8LKB6fBYVaw Working on cam chains https://www.youtube.com/watch?v=3USSOvAxGgE __________________ peace Paul ZR-1 Net Registry Member #1494

07-28-2014	#9
mike100 Join Date: Feb 2011 Location: San Marcos CA Posts: 1,802	Re: GM Twin Turbo DOHC. No V8 will be directly derived from the twin-turbo cadillac V6 as that block is a narrow 'v' 60 degree v6 and V8's will be at a 90 degree bank angle. I think a dohc V8 would have to be a clean sheet design and would cost GM plenty. If it isn't in trucks, it won't get the volume they want for economies of scale.