pulley size

[330mach1]

Hi, I have a 5.4 with a blower from an 03 cobra installed on it. i only want to run 8-10 psi can you tell me which pulley i should order?

 

[Carbd86GT]

Honestly, we really can't give an accurate answer to this question as there are so many variables. Simple guess, maybe a pulley around 3.20 inches. Hope that helps, let us know if you have any other questions.

Thanks.