Hey i put a Greddy turbo on my rx8 and i was wondering what kind of spark plugs are best to use?

 

are u just doing 5psi?

 

7.5

 

The NGK BUR9EQP RX-7 Trailing plus are good but you don't really need them until you go over 12psi or so. You can stick with stock plugs unless you just want to save money on the cheaper BUR's.

 

In my honest opinion, saving money for things like that isn't too smart, I'd rather buy something reliable and good even if my car is less PSI .Thanks for the answer, much apriciated!

 

By the way can they fit properly or do they need some adjusting?

 

On my RX-7 (non turbo) I run 9's all around. It is mostly freeway driving. For mostly city driving I'd use 7's in leading and 9's trailing. How you drive affects what you should use just as much as how much power you are making. At the worst for a mildly boosted system, you'll probably be fine using all 9's.