[Stan Weiss]

Originally Posted by Dragncar

Leech told me he had to go dry sump at the RPMs he wanted to run. Either that or a lot of time. effort and risk making a pan with serious baffles.
Shifted @8,800 and crossed the line 9K+ I believe. Out of E heads with stock valve location and stock E guides. Safe to say they were maxed out.
I have L jacks old E heads done my Gabby. Flow 408cfm. Mikes went 414 (and Marcella with tell you cfm is only 48% of the answer, I believe him)
Gabby told me the heads will pull to 7500 with a 535 and 7800 with a 505.
Almost the same cfm and Mikes heads had 1000RPM more "pull" to them with a 565 no less.
Tells you its all about the combo. That and 18-1 and a BOP with a ton of work done to it.
Anyway, might want to consider dry sump.

Maybe you should talk to John Marcella about why those 414 cfm heads pulled 1000 more rpm than someone else's 408 cfm heads will on a 566.

Stan