I just compression tested my 00 GSR today. Its got about 127k highway miles on it and the numbers I got are:

#1-- 210
#2-- 210
#3-- 215
#4-- 220

The numbers seem pretty good to me, the reason cyl. 4 is higher is probably bc the compression tester was a little loose before and we tightend it up after part of the compression tester got stuck in cyl. 4 on our first try. Are these numbers good for JRSC running the stock 6psi pulley that comes with the kit?

 

Boost away! Those #'s are fine

 

they look good all within 10-15% have fun.

 

those are pretty good!

 

sweett....boosted GSR! haha, thanks for the heads up