[Nayr747]

Ok, but my point is: if the hemi's are not a better design than normal engines of today then why are they being advertised so much and being put in every car in GMs lineup. I mean, I'm sure they were great when they came out and a big improvement over the flat head design but what does that matter today? Is it just advertising hype, trying to capitalize on people's memories of their old hemi powered cars and a way to cut costs?

Originally Posted by drdisque

Also, all of the competing engines you listed are Truck engines designed for large trucks where the main goal is torque rather than horsepower and therefore they are tuned to sacrifice top end HP for Low end torque.

I didn't think of that. Good point. But I think the new Grand Cherokee with a hemi does 60 in 7sec. The magnum, though, with a hemi is very slow i think.

So, other than forcing more air/fuel into the cylinders or increasing the space and therefore allowing more air/fuel to enter (with 14.7 psi of normal atmospheric presure, right?), the only way to increase hp is different tuning or increased efficiency, right? I'm really just trying to get all this straight.