Quite a few people are running the high boost (AP2) pulley on their stock AP1 Comptech kits with just some FPR adjustments. I know that Comptech says that it should be fine (although it voids the blower warranty). Has anyone run a 7psi pulley on a AP2 with the stock kit (no EMS or injectors)?

 

BUMP...

Has anyone run the 7psi pulley on a stock 04+ Kit?

 

I was told car will run lean w/o injectors...pm Silver S2k4

 

The "stock" pulley for the AP2 is Comptech's "high boost" pulley (aka 7psi) used on the AP1's. You'll need a something smaller for the AP2 to achieve > stock boost.

 

The 7psi pulley made for the AP1 kit will only do like 5psi. I had the 9psi AP1 pulley which made 6.6psi. At this point it was running just a tad bit lean and I put in 550s.

I don't remember for sure now but I think that the AP1 stock Comptech pulley was either .15" or .25" larger than the AP2 pulley, both the kits still ran 5.5 psi.

The only thing I can say for sure is the the 3.25" pulley ran 13.5 psi.

 

This thread is exactly why we need to refer to the pulley size and not "pounds."

https://www.s2ki.com/forums/index.ph...pic=380286&hl=