[jessrayo]

Originally Posted by LesBaer

We're taking about LT4 SC kits here, right? Not the engines. I'm aware of the forged internals being different in the engines, however if all of those components can be directly replaced into the LT1. They also used the same fuel on both to push them to their maximum output as a direct comparison. That's why they're using them on LT4 engines with E85. The point of this example is to show that with the same variables one blower can create more power than the other and it runs cooler.

"So with no other changes the Magnuson 2.3 liter makes almost 100 more rear wheel horsepower, has a much better top end curve, holds boost better, and runs cooler. Chevrolet made a mistake."

I thought we were talking about putting LT4 supercharger kits on a LT1 engine on this post. The engine the supercharger goes on makes all the difference in the world. If you want a reasonably priced build without changing the entire block (big money) then the LT4 supercharger will give all of the power the LT1 block can ever put out. Upgrading to a 2.3 supercharger will not make any difference on the dyno until you change internals on an LT1 motor. You can change the internals on a LT1 motor, if you do and you decide you want a motor that can make as big a dyno number as possible, then get a 2.3 or maybe the 2.9 whipple or a set of turbos. But what I'm saying is, if going in you don't plan on building a block then the 1.7 is all you need, there is no advantage to put on a bigger supercharger.

I guarantee you if you were to talk to the engineers at Chevy they will not agree with your vengeance racing guy who said, "Chevrolet made a mistake." The goal of the GM engineers was to built a reliable and warrantied car with about 580 whp, they did a great job, no mistakes here. The 1.7 works fine and has no trouble at all operating in this power range. To imply that the GM engineers went out to see how much power they could possibly squeeze out of a LT4 motor and somehow goofed when selecting a supercharger is ignorant. I have seen that article several times before and it irritates me every time I read that quote at the end of it. I don't personally know who made that quote or if it was taken out of context but I disagree with it. GM made no mistakes on the LT4 engine. The vengeance guy made a mistake when he opened his mouth... He needs to stay on the dyno and do what he is good at.