Ideal gap for spark plugs running 23psi?
Jun 6, 2006, 11:49 AM
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Ideal gap for spark plugs running 23psi?
When I was getting my car tuned, the tuner noted that the car tended to hiccup a little between 5,000rpms and 5,500rpms. He thought I should change the spark plugs (car only has 35k miles). So I changed the spark plugs with NGKs (copper kind) and gapped to 0.25. Put them on the car and the car felt good, but at idle, the car would sputter every 6 seconds. So I took them out and put the stock ones back in. No sputter at idle. What should I regap the plugs to?
Thanks,
-M
Thanks,
-M
Sep 13, 2007, 06:24 AM
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I used to run BR8ES when I was just running the stock turbo @ 23psi. I would gap them high around .027 to .028. When I started running them, I tightended the gap because of the extra boost. I went down to around .022 to .024. The larger the gap the better for performance, however, it will cause them to start misfiring quicker. I always thought it was worth going a little bigger since all you have to do is tighten the gap a little if you started misfiring. Or you can buy 4 new plugs for under $10 :-)
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Sep 13, 2007, 03:44 PM
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I used to run BR8ES when I was just running the stock turbo @ 23psi. I would gap them high around .027 to .028. When I started running them, I tightended the gap because of the extra boost. I went down to around .022 to .024. The larger the gap the better for performance, however, it will cause them to start misfiring quicker. I always thought it was worth going a little bigger since all you have to do is tighten the gap a little if you started misfiring. Or you can buy 4 new plugs for under $10 :-)
Sep 13, 2007, 10:10 PM
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yes, run bpr7es's at .026 or you can go tighter if it misses, but I have had mine in for awhile at 23psi on pump and never missed a beat. No need to go to 8's yet
