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-   -   What does 964 head flow? (http://forums.pelicanparts.com/911-engine-rebuilding-forum/1050072-what-does-964-head-flow.html)

JoeMag 01-15-2020 03:32 PM
What does 964 head flow?
 
Anyone have flow numbers for 964 head with 51.5mm intake valve at lift of 0.5" (or something close)?

faapgar 01-15-2020 05:41 PM
Head flow
 
I do not know about flow with a 51.5 intake but stock head is better than a 3.2 version.I have used heads from Bill at Extreme with 50.5 intake.Ciao Fred

faapgar 01-15-2020 05:43 PM
Head flow
 
That head was a 3.2 just for clarity.

dannobee 01-16-2020 08:18 PM
about 260cfm @ 0.500", 28inH2O on the intake. 180cfm @ 0.500" on the exhaust.

winders 01-16-2020 09:26 PM
Wow. Xtreme heads flow about 323/227 at the same values. The valves are 2.08"/1.635".....

dannobee 01-17-2020 07:10 AM
That's what 30 years of technology does for you. ;-)


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