Pushrods variable future

Previously, independently-variable intake and exhaust timing was only possible with dual overhead cams. But thanks to the engineering wizards at the British firm Mechadyne, pushrod engines can now benefit from this technology as well.
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neutral - 1/22/2007 11:03:55 PM

+1 Boost

Hasn't GM been doing this for years? The 3.5 and 3.9 pushrod have variable cam phasing.

neutral - 1/22/2007 11:23:06 PM

+1 Boost

Displacement: 3510cc

Assembly Site: Ramos Arizpe, Mexico

Configuration: Overhead Valves (2 valves per cylinder).

Horsepower: 224 @ 5800 rpm*

Torque: 220 @ 4000 rpm*

Applications: Chevrolet Impala, Chevrolet Monte Carlo, Saturn Aura, Pontiac G6

Features: Variable Valve Timing
U Flow Cooling, E85 Capable

*For 2007

---------------------------------------------
Displacement: 3880cc

Assembly Site: Tonawanda, New York

Configuration: Overhead Valves (2 valves per cylinder).

Horsepower/Application:
233 hp @ 6000 rpm (Chevrolet Impala)

Torque:
240 lb-ft @ 4800 rpm

Features: Dual Variable Valve Timing
Roller Rocker Arms
Active Fuel Management (DOD)

dumpsty - 1/23/2007 7:20:25 AM

+1 Boost

I like that the big American V-8s have the multiple displacement features. That's a big leap over past conventional thought.

chewy - 1/23/2007 7:41:06 PM

+1 Boost

But that doesn't work in the real world, look for the Edmunds pickups comparison, the Chevy has the lowest real world fuel economy.