pulleys
 

Is there a way to tell what boost your running by measuring the pully.

yes,well sort of. You can calculate but you better put a gauge on it and measure,,too many Vars. What charger and pullies?

This will give you a starting point.

To many variables to give actual boost pressure
Volumetric efficiency plays a major role

http://theblowershop.com/

Select drive ratios

Gerry