Hi, I have a GSR '97 and I'm going to put like 100hp of NOS; I want to know what compression ratio of pistons i have to use having in mind that I'm using forged pistons "ROSS" and what else I have to modify to my car? because I don't want to be too slow without NOS.

THANKS...

 

a little under 10:1 would be perfect. about 9 or 9.5:1 and also a set of good connecting rods as well.