Going from a P1 to a D1-what kind of increase in boost will I see?
09-11-2006, 05:53 PM
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Going from a P1 to a D1-what kind of increase in boost will I see? Hi guys-i'm switching from a P1 to a D1. With just the head swap what kind of increase in boost will I see. Right now with a 3.85 pulley on my P1 I see 10 psi at 6500 rpm. I have been lead to beleive the the D1 is worth about 4psi over the P1 with the same pulley.
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09-12-2006, 07:56 PM
#8
The D1 will not make more power than the P1 at the same PSI. However the D1 with a bigger pulley will make the same power as the P1 with a smaller pulley at the same PSI. And the P1 and D1 are the same external size with some different internals.
