IS GM capable of making a small block DOHC

[Rapid Runner]

We all know GM is kinda the king of pushrod small block V8 technology.. nuff said

But I would really love GM to do a performance OHC V8 while keeping the profile of a small block pushrod

GM did such a good job with it's Direct injected V6's, just imagine what a compact 5.7 DOHC would do.. though that might be heresy

thoughts

[Angrybird 12]

Since the DOHC would require larger heads to accommodate the cams and making room for the long timing chain you would lose the compactness of the current small block motor.

[Mr. iNCREDIBLE]

ok so you all know the Caddy Northstar was a small block DOHC motor right?

production was ceased on the Northstar in 2010, so yeah GM is capable..


http://www.underhoodservice.com/Arti...supernova.aspx

[Angrybird 12]

Originally Posted by Mr. iNCREDIBLE

ok so you all know the Caddy Northstar was a small block DOHC motor right?

production was ceased on the Northstar in 2010, so yeah GM is capable..


http://www.underhoodservice.com/Arti...supernova.aspx

Didn't they also use it in the Oldsmobile Aurora? Or at least another version of it.

[Rapid Runner]

Originally Posted by Mr. iNCREDIBLE

ok so you all know the Caddy Northstar was a small block DOHC motor right?

production was ceased on the Northstar in 2010, so yeah GM is capable..


http://www.underhoodservice.com/Arti...supernova.aspx

I wasn't aware of that.. thanks for the info

That being said.. from what I heard, The northstar was one of those engines GM would hide in the closet from the rest of the world, it wasn't as nearly good as the LS series

[trademaster]

Is GM capable of hiring the same engineers other manufacturers hire? Yes. There's your answer.

[Rapid Runner]

Originally Posted by trademaster

Is GM capable of hiring the same engineers other manufacturers hire? Yes. There's your answer.

no need to be a smartass

just a convo

[Truck Norris]

The DOHC LT-5 seemed to fit the C4 ZR1 just fine and it delivered super car performance. There are built versions spinning 9,200 rpm on youtube and Nelson Racing Engine's have a few build videos as well.

[Dave McFly]

Originally Posted by Angrybird 12

Didn't they also use it in the Oldsmobile Aurora? Or at least another version of it.

other than it being a 4.0 instead of 4.6 liter they were basically the same motor.

[trademaster]

Originally Posted by Rapid Runner

no need to be a smartass

just a convo

It's not being a smartass, it's answering your question. They have access to the engineers, they have access to the technology, they have access to the capital, so they have the capability. If all the inputs are available, the output is possible.

[Bhobbs]

GM has built DOCH V8s in the past so clearly they can. The question is do they need to? If GM can get the performance they want out of a push rod V8, why switch to DOCH?

[Dr. Evil]

I was wondering how long it would take for someone to mention the LT5.

GM did that in 89 and released it as a 90 model. There are some very streetable 415 stroked versions making 650hp.

[Angrybird 12]

Originally Posted by Truck Norris

The DOHC LT-5 seemed to fit the C4 ZR1 just fine and it delivered super car performance. There are built versions spinning 9,200 rpm on youtube and Nelson Racing Engine's have a few build videos as well.

Actually that wasn't completely designed by GM it was a joint design with Lotus and was built by Mercury Marine.
http://www.corvettemuseum.org/specs/.../history.shtml

[sycraft]

When it comes to technology no one does it better than Chevy. More than 40 years ago, Chevrolet made the leap into automotive technology when they introduced fuel injection in Corvettes. In the early '80s, computer electronics made their way into F-bodies and in 2003 they figured out how to squeeze 675 hp out of a 280-pound 3.5L naturally aspirated engine.
At this year's Test In The West, held at California Speedway in Fontana, California, we had the opportunity to get the inside scoop on Chevy's plan to dominate Indy car racing.
According to the folks at GM, Chevrolet's new Indy muscle has been redesigned from the ground up to meet the stringent rules of this year's engine guidelines. With the rpm limit lowered from last year's maximum of 10,700 to 10,300, generating the proper horsepower while maintaining greatest fuel efficiency presented quite a challenge.
Chevy's new aluminum V-8 was born with a newly designed aluminum block. A design that dropped the overall dimensions 3 inches in both width and length. Atop the new block lies aluminum heads with dual overhead cams housing four titanium valves per cylinder. Lightweight alloy cylinder liners with dual injectors per cylinder have also found their way into this tightly wound powerplant.
In addition to the five teams who are currently running Chevy engines, other teams have expressed great interest, said GM Racing program manager Joe Negri.
With a price tag of $120,000 and a useful rpm range around 10,000, we won't be seeing any of these trick fuelie V-8's in Tri-5's or First-Gen Camaros, but that doesn't mean it wouldn't be cool!


Read more: http://www.superchevy.com/hotnews/su...#ixzz2ZmBZdkrY