maz90rex

any certain spark plugs or brands i should use in my 90 rx7 gtu n/a? thanks for you replys. I also heard that i should use lower octane gas in my car. . . is this true?

GoodfellaFD3S

iTrader: (213)

NGK 7s in the lower (leading) holes and NGK 9s in the trailing (top) hole should do it. Prolly go for Platinum. IIRC, the part #s are BUR7EQP and BUR9EQP--not 100% sure. Make sure they're NGK rotary specific---piston spark plugs will be bad for your apex seals .

Re: fuel, what octane are you running now? 87 should be A-ok on an n/a rotary.

TurboFD

anyone using the HKS rotory spark plugs? and if so how do they work?

Drifter93

I am not running the HKS plugs but I am running the HKS twin power and using the Greddy race plugs and I have had no problems with my ignition, car runs great.

maz90rex

thanks. i was running my car on super but i was told to use regular in my 90gtu na

GoodfellaFD3S

iTrader: (213)

PM ErnieT. I think he had an electrode come off on an HKS plug and grenade his motor.......

813KR$

The lower octane is more flamable than the higher octane. Less flamamble means smaller explosion, means less power = possible carbon lock.