Quote:
|
The 4.6/5.4 Ford motors that replaced the venerable 302 and 351 are both DOHC designs, and utilize 4 valves per cylinder, and the Chevy LS1 based engines 4.8/5.3/5.7/6.0 do nearly the same.
|
Umm...no. The 4.6/5.4 in the F-Series is SOHC, and the 5.4 is 3 valves per cylinder. I think the 4.6 is still 2 valves per cylinder. GM doesn't put multi-valve, multi-cam engines in their trucks. Yeah the TrailBlazer is a I-6 4 valve DOHC motor, but the 4.8/5.3/6.0/8.1 truck engines are still 2v/OHV. The LS1 and LS6 5.7 Liter engines are also 2v/OHV. And make 400hp. And get 30+ mpg. Now, THAT, my friends, is an economy car.