Holley Power Valve Selection?

[cobrarwanab]

How do you select the correct power valve? I bought a used 650 DP. I cleaned it up and installed a rebuild kit. i replaced the power valve with the same that was removed. My issue is at idol the exhaust smells like shit and will burn your eyes. I adjusted the mixture screws to achieve max vacuum. Could the power valve be the root of my problem?

 

[dave89iroc]

IIRC, you want something like a PV with a number 2" lower then idle vacuum

 

[82bird]

i usually go 1/2 of what your manifold vacuum is at idle..

14 in. manifold vac., try a #7 PV

 

[cobrarwanab]

IIRC, you want something like a PV with a number 2" lower then idle vacuum

i usually go 1/2 of what your manifold vacuum is at idle..

14 in. manifold vac., try a #7 PV

Thanks!

 

[cobrarwanab]

What symptoms would you have with too large of power valve?