Whipple pulley

[S550jay]

How much power can you expect from each pulley/psi starting with

11

11.5

12

Just trying to guess how much power I'll will be at when I turn up the psi and add some long tubes and the bigger TB on the 2.9 whipple

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[evo8904]

How much power can you expect from each pulley/psi starting with

11

11.5

12

Just trying to guess how much power I'll will be at when I turn up the psi and add some long tubes and the bigger TB on the 2.9 whipple

A 3.75 pulley will have you around 11 psi. Each size smaller will give you 1 psi more. I have heard that off-road headers can lower your boost by 1 psi.

 

[Reds197]

Headers will lower boost but increase HP due to efficiency. 1 psi is around 15-18 at the wheels.

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