anyone got stock flow numbers for a GSR head? Need IN and EX, a graph would be perfect thanks

 

236cfm IN. and 179cfm EX. ??

 

What's the advantage of knowing? It'll still flow the same.

 

so many different cfm numbers, portflow told me EX. 170-180cfm at .500 lift, Alaniz is 153cfm @ .500 lift?? wtf!!

 

whats alaniz IN. number?

 

If I recall correctly, the intake is about 240 cfm @ 0.500 lift.

 

The ALANIZ chart is @ 10" of test pressure. The number's everyone is used to seeing are at 28" of test pressure. What Portflow told you is realistic for an EXH port. I havent seen a GSR/B16 exh port pushing close to 200 cfm @ .450" with a stock valve job.

 

what are your ported ex. numbers? u can pm me if u like

 

My Stock GSR head at 28" IN 246.7@.500, EX 168.6@.500