Slightly strange head flow question.

Rat Patrol said

Here's the question.:

The build includes - Cam .540 lift, M1 intake, 392 cui stroker, 800cfm carb

With ported 589s (2.02 valve) that flow [email protected] the engine makes 420 HP

With OOTB RHS heads that flow 255 @ .550 it might make around 435 HP?

With "hyperported" Eddies that flow 300 @ .600.............would it make any more HP ?

............or is there a point that the heads won't show any improvement?

In other words...is there an "ideal" port peak flow # and how is this calculated?

(Assume the intake is gasket matched etc and best valves etc.)

Click to expand...

There are more important things than flow. The RHS head has a much better chamber, much better ex. port and flows more air. It will make at least 20HP more than a nicely ported OEM head.

The edelbrocks fully ported will make more power on that engine, but it won't be alot. Mainly because the build is so mild, it won't help a ton. I would say maybe another 20-25HP over the RHS unless your using the small valve in the RHS then you'll see a larger gain.

Flow is dependant on many things like piston speed (rpm and stroke), bore size, intake, headers, carb, and so on. So if any of those things kink the rest of the build, the good flowing head won't shine.

Brian