I would really recommend lowering the compression. That kind of compression and boost wont get along very well before detonation sets in. Most people run 9 range for boost, lower for higher numbers of boost.

HTH

 

can I still use my JE 12.5:1 pistons with a JRSC? or would I need to lower the compression?

the engine is currently built for NA. thanks for any advise

 

Thanks, so the pistons, should really be around 11:1 or stock?