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Discussion Starter · #1 ·
Just want to get some opinions. I know that you cant beat the factory type
NGK plugs. just wondering which one to go with. Car has all the usual bolt
on goodies plus JUN cams and I am running factory compression. Cars is
always driven at the upper limit of the rpm band. Mainly a lot of road
racing with the car. Always use 93 octane gas or better. Should I go with
the stock heat range or a range colder/hotter. just want to get some
opinions. THANKX!!!! (too bad JUN doesn't make spark plugs:))

1991 SE-R (too many goodies to list)
Craig "JUN Auto" Damaschi


employment whiplash, NC
3,646 Posts
I've gone with one heat range colder than stock. Actually, I've got the "original" heat range for the SE-R. From the stories I've read/heard, they replaced the plugs with one heat range higher after the first few shipments from Japan arrived with fouled plugs due to contstant starting/move 20 feet/stopping during loading/unloading from the ship.

I haven't had any problems at all.

92 SE-R from Heck
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