NPI outflow PI heads at .5 inches of lift or more.

ModMustang97GT · September 18th, 2007, 12:51 PM

http://www.musclemustangfastfords.co...tch/index.html

So according to this testing (read the bottom table) with a .500 lift cam, you will get better flow with a NPI head than a PI head. But the PI heads make more power. So does that mean that the better flow through the lower lift ranges makes more power, because you spend more time in those ranges than you do at max lift? If that is true, then wouldn't you want a cam that is huge duration with max lift for a NPI head, and then you could potentialy make more power than the PI heads?

SWEET2KSTANG · September 18th, 2007, 07:35 PM

yes and no. the v.e. if the p.i. heads is so much greater that any strong point of the npi heads that it isnt worth doing.

September 18th, 2007, 12:51 PM	#1
ModMustang97GT Enthusiast 1997 Mustang GT Join Date: Aug 2007 Location: Seattle, WA Posts: 548	NPI outflow PI heads at .5 inches of lift or more. http://www.musclemustangfastfords.co...tch/index.html So according to this testing (read the bottom table) with a .500 lift cam, you will get better flow with a NPI head than a PI head. But the PI heads make more power. So does that mean that the better flow through the lower lift ranges makes more power, because you spend more time in those ranges than you do at max lift? If that is true, then wouldn't you want a cam that is huge duration with max lift for a NPI head, and then you could potentialy make more power than the PI heads?

September 18th, 2007, 07:35 PM	#2
SWEET2KSTANG MM Fanatic 2000 mustang gt 12.01@114.69 Join Date: Oct 2006 Location: N.W. AR Posts: 4,362	yes and no. the v.e. if the p.i. heads is so much greater that any strong point of the npi heads that it isnt worth doing. __________________ stock long block, bolt ons, slicks, and a little squeeze 1/4 E.T. 12.06@114.69 Only two defining forces have ever offered to die for you: 1. Jesus Christ 2. The American G. I. One died for your soul, the other for your freedom.

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