Mike V. Florida
Well-known member
What ratio is your high compression head? You can select more than one.
Head Compression ratios
- Thread starter Mike V. Florida
- Start date
MikeK
Well-known member
Super Brumfield Head
This is one of my blueprinted Super Brumfield heads with 117cc chambers.
The 'Super' differs from the regular Brumfield heads. Lowered plug seats, necessitated by the shallow chambers, are recessed rather than spotfaced flush with the top of the head.
Cranking compression with a Stipe 340 cam is 160psi. Vroooomm ! !
This is one of my blueprinted Super Brumfield heads with 117cc chambers.
The 'Super' differs from the regular Brumfield heads. Lowered plug seats, necessitated by the shallow chambers, are recessed rather than spotfaced flush with the top of the head.
Cranking compression with a Stipe 340 cam is 160psi. Vroooomm ! !
Blessyouboys
Senior Member
If this poll is for high compression heads, why is stock compression ratio an option?
Purdy Swoft
Well-known member
I am running 5.9 and I am happy!!!
Terry NJ
Well-known member
Re: Super Brumfield Head
Wow! An 11 to 1 comp ratio on a Mod A. Well a little less! 14.7 lbs atmospheric pressure (14.7 X10= 147 lbs, 14.7 X11 would be 161.7) This is given the 100% of volumetric efficiency at cranking speed. WoW that's some head! Pretty to look at too!
Terry
Wow! An 11 to 1 comp ratio on a Mod A. Well a little less! 14.7 lbs atmospheric pressure (14.7 X10= 147 lbs, 14.7 X11 would be 161.7) This is given the 100% of volumetric efficiency at cranking speed. WoW that's some head! Pretty to look at too!
Terry
This is one of my blueprinted Super Brumfield heads with 117cc chambers.
The 'Super' differs from the regular Brumfield heads. Lowered plug seats, necessitated by the shallow chambers, are recessed rather than spotfaced flush with the top of the head.
Cranking compression with a Stipe 340 cam is 160psi. Vroooomm ! !