Supercharged Smallblock Combination.

moper said
Iron heads cant make as much, no matter how nuch force you use to push the air thru. The problem is cross section..Most iron heads (Baring W2s) dont have enough to move the air volume required. You boost is backpressure in the intake system..That's what it's hitting for resistance. Like water in a hose, or oil flow..Press is a resitance to flow..Not the flow itself. Smaller port will reach 10psi faster, especially when paired with a larger blower, even a centrifical model. And that 10 psi will make less power overall, then 10psi of boost with something say 20% larger in cross section. Also, you want to be sure that the engine produces 750hp at the crank, when under boost. If it were me, I'd run an intercooler, and ditch the carb idea too. Not having looked to see your flow numbers, I'd say you will fall short with any factory iron head I'm aware of, even in ported shape. Also, for the intake, your midrange is produced by the blower..As is your top end..The only thing to keep in mind would be low rpm operation, because it wont be moving a ton of air right off idle. But, that's also what the convertor is supposed to help with. Blowers and turbos are different animals..Not my strongest area either..You may want to hunt around for some info on designs before you continue buying stuff. just my $.02..

The cast iron heads I have outflowed a set of edelbrock aluminum heads on the same bench. They were within 18cfm peak flow of a set of edelbrock aluminum heads that were worked over by Indy. They flow very well for a set of cast iron heads.

I am going to be running a Water/methanol injection set-up. Which is much more efficent than a conventional air to air intercooler. Also much less plumbing to do.

I have done a ton of research on this. That is how I came to my decision to purchase the supercharger, it is much more practical for what I want to achieve. I have talked to several people running cent. superchargers, asked them set-up ideas, pros & cons, etc. Not many people have tried a dual plane and no one I know of has run the Air-gap. I'm curious to see how it does. If it doesn't produce good numbers than I will throw on the M-1 single plane I already have, no big deal.
I'm alittle unsure of why you don't think the cast iron heads would produce 750hp. I gave you a link for a cast iron headed smallblock making 1000hp at 15psi. According to the tech. people my heads are flowing right about the same as his.

P.s- Just watched a D-3 supercharged (carbureted) smallblock chevy at 8psi and pump gas run a 10.80 @ 136mph....