Will a comptech sc from an 04 fit Directly on and work fine on an 03?

 

At the very least the pulleys would be different. AP2 pulley will make more boost on an AP1 due to the higher rev limit.

 

Get it! You will appreciate the extra power from that size pulley, wile still being within the demands of the base tuning system. Worth 15-20whp more.

 

What size is the pulley 4.25 or 4?

 

Just found out that the fpr on the 03 and 04 is different

 

I am running a kit that was on an 05 in my 01, the boost difference is only like 1 PSI. As for the FPR, it worked just fine in mine until I went kpro/injectors and put the stock FPR back in.

 

What size pulley? And how many psi?

Also is it hard to adjust the fpr? What's the air fuel reading suppose to be at? Idle and redline?

Sorry for all the questions, just trying to get prepared so when I install mine .

 

I don't have the exact details for you right now, as ive been deployed for the last 6 months and dont have access to my car. But its the pully that comes with comptechs AP2 kit, which I believe is spos to push around 6 psi on an ap2, think it gets about 7 on mine. Havnt had it dyno'ed yet though so I dont have exact numbers. As for the FPR it shouldnt need adjustment, but if it does, all it is a bolt on the top that you tweek a bit till you get it where you want it.