Any one now how to figure this out.

Blower pulley ratio = crank pulley diameter / blower pulley diameter x the internal step up ratio = blower RPM. You get the most out of the blower relative to the speed of it.

What I have is a P600B no after market pulleys or anything like this.

I will how ever ask what pulleys are available to get the max out of this blower.

 

Your question seems a little unclear...are you asking how to calculate the engine rpm your blower will be maxed out at given the diameters of the pulleys used???

 

To calculate impeller rpm: blower pulley/crank pulley x internal gear ratio = impeller rpm. For a P600B, the ratio is 3.05:1 and the max impeller rpm is 60,000. There are lots of pulleys available from Procharger and other sources. If you want a rough way to guesstimate boost you will see from maximum rated cfm, go to: http://www.kennedysdynotune.com/ and under the Tech Tips dropdown, go to "Calculating Blower CFM". I now realize I misnamed that and need to title it "Estimating Boost from Blower CFM"

Rich

 

Thanks