Whipple pulley?

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09-18-2007, 11:24 PM

JasonSmith

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Whipple pulley?

If my 3.118" pulley makes 7 lbs of boost on a 454, what will a 2.875" pulley make on the same motor?
Hp now is supposed to be 650ish. So hom much more with the added boost?

09-18-2007, 11:37 PM

Young Performance

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add 2-2.5 lbs or 9-9.5 lbs of boost. Should add between 50-75 hp, depending on a few variables. Eddie

09-19-2007, 12:31 AM

QWKRN U

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Turn it up....

09-19-2007, 12:37 AM

JasonSmith

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Quote:

Originally Posted by QWKRN U

Turn it up....

I got to! I got beat @ Perry. Besides, injectors & pullies were cheaper than new propellers.

09-19-2007, 12:53 AM

Griff

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Stocking up on the XR's too, I hope. LOL

09-19-2007, 12:55 AM

JasonSmith

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I've used 2 of my spare drives, but 2 were stolen, so......

09-19-2007, 08:37 PM

zt260

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Quote:

Originally Posted by JasonSmith

If my 3.118" pulley makes 7 lbs of boost on a 454, what will a 2.875" pulley make on the same motor?
Hp now is supposed to be 650ish. So hom much more with the added boost?

It would put you at 9psi+/- and into race fuel. (to be safe anyway) From my experience expect no more than 50Hp more. It could be less depending on your setup.

BTW, the reliabilty goes way down at this point.