ok, im about to order the jackson racing supercharger for my 99 si. it comes with 6, 8 and 11 psi pulleys . and to get to the point i wanna know whats the max psi i can push (still on a safe level) without risking blowin' my engine. yea this is a *sigh* question for some of you but... i gotta know.

 

well i can tell you that you dont want the 6 psi pully i had a jrsc on my ls and it was slow just go turbo Ive had turbo and jrsc turbo is the way to go

 

idk, i was thinkin about the greddy turbo intercooler kit but, i was kinda set on the jrsc. but just for the record, you think it can hold the 8 psi pulley?

 

I would get both the 6 and the 8. Run the 6 on the street and the 8 at the track.