What Are You Guys Running For Spark Plugs? I Have Dart Pro One 355 Cnc Heads.

Autolite Racing 3911






Roccard Marine Engines
www.roccardmarineengines.com
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570-956-2840

champion CR12YS,ac delco FR3LS,autolite 3932. If you want something colder champion cr9ys or ac delco fr2ls

wow you guys are all over he place. the motor is 10.25to1 dart tunnel ran 2 850 hollys .730 lift 264/272 112 cl does this help and what gap are you running i have a msd 6al box and dis.thanks dennis rogers

Everyone has a favorite brand,myself I don't. I run over the counter everyday plugs,even in my blower motor,I never liked the idea of "racing" plugs except in drag motors and have never seen a difference. I would run .040 or .045 gap with the msd and open it up another .005 everytime you change the plugs until it acts up or you get to .055-.060. I just dynoed my motor normally aspirated at .050 with msd 6al and it was fine but I only have 8.22-1 compression,you have more compression,I would start at .040 and work up. If you run WOT sustained and are working on jetting down I'd start cold on the plugs and work towards hotter if they foul,Smitty