Cylinder head flow data Options

[lmcchesney]

Does anyone have ranges for Type IV cylinder head flows with customary pocket porting and port matching? I believe is about 200-225CFM at each port. Also, any data on the effect of large valves on the flow rates? Any data on port velocities?
Yes, I know that miminal changes can produce significant changes in flow. However, in reality, there is not a lot of variations in the P/P of these heads.

Thanks,
L. McChesney

[Brett W]

I am not saying don't try it but I can't understand risking a motor due to archaic fuel control just as a home project. For racing that may be different if there was some money involved. I personally would take the computer and chuck the guts and put a more modern system inside the factory box so that the casual observer would not be the wiser and really make some major horsepower. You are free to do as you choose but I would reccommend against it.

Geoff is right there are a bunch out there that do it with mild 2056s but why bother. Crank it to 2.2 inject it and build a 200hp motor, that will walk all over a 1971-2056. Granted my 2056 did make 140 through stock heat exchangers I really think there can be more. So up to a 2.2 stoker motor with a turbo ought to make things more interesting.