Amount of CFM available from 452 heads, heavily ported

[oldkimmer]

@PRH
I think @IQ52 has listed or said what he has gotten out of his heads. But, to be very honest, I don’t think your going to match his 45+ years of experience.

. Jim has said b4 that he would charge $3500.00 or more for that kind of flow. Kim

 

[Killer6]

Well, He'll have the larger bore workin' for Him at least, +#1.

 

[RustyRatRod]

I think @IQ52 (Jim Laroy) has made 700 plus HP from 452s fully ported. Maybe he'll chime in.

 

[RustyRatRod]

. Jim has said b4 that he would charge $3500.00 or more for that kind of flow. Kim

Correct. It ain't cheap. But then, it shouldn't be.

 

[Bewy]

PRH.
Post #25. Great numbers, & it looks like very little was taken out of the pinch.
Many attack the pinch first thinking it is a restriction, gain no flow & have reduced velocity by doing it.

 

[Dale Davies]

I have two sets , practice on one
I'm prepared to research it , buy the tools, and ask advice
For 45 yrs I've wanted to Port heads

I recommend getting David Vizard's book Porting and Flow Testing. He describes his "really cheap flow bench". Does not read out CFM but does indicate where air is flowing if you get flow balls and pitot tubes.
Understanding where the air wants to flow and where flow is dead is important. Developing or improving swirl in the combustion chamber is highly beneficial.
In the ports, increasing cross sectional area may not provide the benefit you are looking for. The same goes for a mirror smooth surface in the port. 80 grit stones leave a beneficial rough surface that aids mixture suspension.

 

[IQ52]

I think @IQ52 (Jim Laroy) has made 700 plus HP from 452s fully ported. Maybe he'll chime in.

452's on the 451 pump gas stroker was 650+ hp and 906's on the 500 pump gas stroker was 730+ hp. Both sets had 2.25/1.81 valves.

Just for the fun of it let us add that ported Edelbrock RPM heads made 787 HP on the same 451 pump gas stroker. Yeah everybody got 2.25 intakes.

 

[rumblefish360]

Yeeeeee - Hawwwwww!!!!

 

[JR Mopar]

 

[RustyRatRod]

452's on the 451 pump gas stroker was 650+ hp and 906's on the 500 pump gas stroker was 730+ hp. Both sets had 2.25/1.81 valves.

Just for the fun of it let us add that ported Edelbrock RPM heads made 787 HP on the same 451 pump gas stroker. Yeah everybody got 2.25 intakes.

Thanks Jim! Hope yall are doin well!