P1X Pulley size recommendations

[sloride]

Id say that's looks good. Im near max with that belt and a 4.13

Yeah it seems just fine.

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[sloride]

13psi with the 4.25 pulley

 

[80FoxCoupe]

I would have thought boost would have been higher with p1x and 4.25, but boost is an arbitrary number.

What rpm?

 

[sloride]

I would have thought boost would have been higher with p1x and 4.25, but boost is an arbitrary number.

What rpm?

Blower is at 57,880 rpm. Engine 7,500 rpm. I don’t have cats so maybe boost is a little lower.

 

[Orly6]

Does anyone have a part number for a belt for a 4.125” pulley?

 

[BBW P1X]

Any one of you running P1X with a 3.625? I'm on a 3.85 and it's running but i want a little more sauce and my buddy has a 3.625 griptec i'm on stock diameter ati crank cattless headers on e85

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