Posted by Glen on 5/2/2008, 10:39 am, in reply to "GT6 racing spark plugs"
74.225.165.37
There are MANY variables that are going to determine what plug is best for your engine. It will begin with "NGK", in my opinion the best, but the specifics will be determined by testing & plug cuts.
You may have the incorrect type electrodes/heat range, or this may be a symptom of another problem.
Glen
--Previous Message--
: I was recommended by my engine builder to
: use Champion C57 but they only seem to
: last a weekend (2 hours) racing and
: then the engine starts spluttering
: above 5000 rpm (I can go up to 7000
: rpm). I replaced them with regular NGK
: plugs and every thing works fine. What
: plugs do you racers out there use?
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