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Discussion Starter · #1 ·
i have a 2004 factory mod, I put a low compression head on it from RKT reprogrammed my computer. Sled had 350 mains in it RKT head is supposed to be able to run 5 sizes smaller, I went to 310's and it still seemed a bit rich, but my plugs are fouling every 5 minuets. I did not change any needles yet and i am still running twin pipes. I think it fouls when i try to go slower speeds, not real slow but not full WOT either. Any help please
 
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