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  1. #11
    browan's Avatar
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    Quote Originally Posted by tiderider View Post
    Don't gap them to .03 just put them in at .028 especially if the engine is modified. I change them often sometimes under 10 hours but it runs 8600 and 15 psi. Also high octane causes early failure, fouls them up. Perhaps putting in a powerful 6 or 8 cylinder engine with a lower WOT rpm?
    @tiderider Stock, not modified. I'll try 0.028"... thanks. I haven't looked at my WOT RPMs, but on glass I can hit 69mph. I run only hi-test gasoline. I've never seen any of my plugs foul (nor burn). You lost me with "Perhaps putting in a powerful 6 or 8 cylinder engine with a lower WOT rpm?"... ???

  2. #12
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    Quote Originally Posted by K447 View Post
    Are all of these spark plugs being purchased from the same source?
    Different sources. But, a few years ago, I became aware of the counterfeit problem. Since then, I vet the plugs extremely closely to make sure (99% sure) they are legit.

  3. #13
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    Quote Originally Posted by browan View Post
    2005 RXT 4-Tec Supercharged 215HP. I've always used the OEM spark plugs (NGK DCPR8E gapped to 0.03). But, they "go bad" on a regular basis. They are not fouled nor burned, and don't have any signs of abnormality when looking at the tips...... one of them simply goes bad. This necessitates that I change all 3 plugs. I would like to find a plug that will last longer. Suggestions for longer-lasting plugs? Please advise. Thanks.
    Are you sure the problem is with the spark plugs??
    Are you bench testing the spark plugs?


  4. #14
    browan's Avatar
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    Quote Originally Posted by tiderider View Post
    Are you sure the problem is with the spark plugs??
    Are you bench testing the spark plugs?
    @tiderider - When you say "bench test," do you mean use a multi-meter to measure the resistance? Or, do you mean something else? Please advise. Thanks.

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