Re: OT: Any Spark Plug guru's Out there?


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Posted by Will (in IL) [98.215.27.52] on Thursday, February 07, 2013 at 17:32:48 :

In Reply to: Re: OT: Any Spark Plug guru's Out there? posted by John W. S. son of John S. [108.3.81.153] on Thursday, February 07, 2013 at 17:23:07 :

Thanks. My issue is I've built a higher compression stroker, and have only 68 miles on it. The miss appears only after the engine is well warmed, and occurs at all engine loads/speeds, but most pronounced on hard throttle acceleration at high RPM. Once well warmed it even will miss some at idle. The plugs I'm running are one setting cooler than stock due to the higher compression and more aggressive cam.

I closed the gap down (from 0.055 to 0.040) and that helped it burn cleaner, the Air/Fuel ratio reading was steadier (not bouncing around as wildly), and now it looks to go rich when it misses.

I think I need one cooler setting plug but looking for someone with some experience to help, someone who has played with these kind of engine modifications.

Will



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