Just finished helping my friend install his Comptech s/c with aftercooler and he has a spare 9lb pulley. He has offered to give me the pulley and was wondering if I can use this pulley without going to a thicker headgasket. My current mods are as follows: Exedy hyper-single clutch kit, J's header and 70rr ti exhaust, Comptech s/c with aftercooler, aem ems, 675 injectors and a 7lb pulley. I'm on a conservative tune now and have 305whp. I usually only drive the car on weekends and occasionally during the week. I do not want to take any chances on damaging the engine (obviously) anyone have any thoughts on this? I believe my current fuel set up will support the 9lb pulley with no problem but would the best thing to do be replacing the headgasket with a thicker one? Or am I safe on stock set up? Any input would great, Thanks Matt

 

You'll be fine. I'm running 10lbs. with no thicker headgasket.

 

What is the diameter of the 9lb pulley is it 3.5 inches?

thanks