I have a 97 type r. #339. I currenly have a jr supercharger on it. Do you think that it would be wise to go with the Boost Upgrade Kit? Or is the stock compression to high?

 

just don't blow it up.

*spell check rules*

 

10psi tuned well is safe on stock internals

 

Do you just have the supercharger or do you have other mods too.

More info is helpful

 

Sorry: Intake, Mugen Headers and Exhaust. Clutch, Flywheel. JR Supercharger.

 

Stock ITR engine will be fine with jrsc up to 10 psi. You will need new fuel pump, BTC, MAP controller, or some other sort of fuel management to prevent detonation. Also, I would suggest a stepper pulley from MVM or a different crank pulley instead of the jrsc upgrade. The jrsc is a smaller blower pulley. The smaller pulley means less surface area, so belt slippage is more likely.