Guest zfan Posted March 7, 2003 Share Posted March 7, 2003 I have a question for those of you with sbc's running Edelbrock rpm heads. I know Edelbrock recommends running Champion rc12yc plugs which I did for a while but what I would like to know is what plugs you members are running and any pro's or cons re: your plug choices. I am currently running ngk's 5155-fr4's supposably a hotter plugs than the rc12yc. Mike Quote Link to comment Share on other sites More sharing options...
Guest Your Car is Slow Posted March 7, 2003 Share Posted March 7, 2003 What do the plugs look like? fouled? white? or normal caramel colored? Car running rich or lean? any detonation occouring? All are signs of you running the wrong (or not the best) plug. Each engine is different...using the plugs as a measure of tune is a very good idea in a high performance machine Quote Link to comment Share on other sites More sharing options...
Guest zfan Posted March 7, 2003 Share Posted March 7, 2003 Plug color is fine after some carb tuning. Changed jets on my 750 dp t0 68 primary and 28 squirter. Still working on secondaries probably 76 jets with 31 squirter. Both pumps are 30cc type. Was just interested in what was working for other folks out there. Mike Quote Link to comment Share on other sites More sharing options...
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