[jedhead]

GM did make a DOHC 4 valve per cylinder V8 with variable intake and exhaust timing, supercharged and intercooled. Also output over 100hp per liter and 100ft-lbs of tq per liter.

Bob

[Ultraperio]

Originally Posted by Damian

I like what they did with the engine. "The new all-aluminum V-8, with 4 valves per cylinder and variable valve timing (intake and exhaust", I just wish GM would do the same with the LS engines.

GM did with the DOHC 4 valves per cylinder LT5. It was too expensive. The LS motors are more compact and lighter than the 4.6 and likely the 5.0 mod motor fords. The Gen3/4 SBC's get equivalent or better gas mileage to the 4.6-5.4 liter fords. The Gen3/4 SBC's have always been more torquey than the mod motors. And until the 5.0 comes out there mod motors haven't been competitive to Gen4 SBC's in power either N/A or supercharged. The SBC's are fine with a cam in block and pushrods. Keeps 'em small, light, and powerful. perfect for slipping into little unsuspecting imports. Good luck getting even a SOHC mod motor under a RX-7's hood.

[Ultraperio]

Originally Posted by jedhead

GM did make a DOHC 4 valve per cylinder V8 with variable intake and exhaust timing, supercharged and intercooled. Also output over 100hp per liter and 100ft-lbs of tq per liter.

Bob

What motor are you referring to? Certainly not a production motor.

edit: As soon as the page loaded and i saw your STS i thought of the STS-V with its supercharged northstar.

[Vettezuki]

Originally Posted by Ultraperio

GM did with the DOHC 4 valves per cylinder LT5. It was too expensive. The LS motors are more compact and lighter than the 4.6 and likely the 5.0 mod motor fords. The Gen3/4 SBC's get equivalent or better gas mileage to the 4.6-5.4 liter fords. The Gen3/4 SBC's have always been more torquey than the mod motors. And until the 5.0 comes out there mod motors haven't been competitive to Gen4 SBC's in power either N/A or supercharged. The SBC's are fine with a cam in block and pushrods. Keeps 'em small, light, and powerful. perfect for slipping into little unsuspecting imports. Good luck getting even a SOHC mod motor under a RX-7's hood.

I once saw a 70s era Toyota Celica with a Terminator motor in it. It was brutal. No firewal and a fair chunk of the bell housing was just in the driver's compartment.

[Ultraperio]

Originally Posted by Vettezuki

I once saw a 70s era Toyota Celica with a Terminator motor in it. It was brutal. No firewal and a fair chunk of the bell housing was just in the driver's compartment.

Sounds like a refined highway cruiser.