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Post by 88mustang on Apr 16, 2012 16:28:50 GMT -5
408w 10/5/1 com 93 octane victor jrs heads super victor jr intake 850 demon need to know what plug and what to gap them i i was run 3934 racing plug pick up some patuimunin plug 3924 no nos
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Post by jparker1229 on Apr 16, 2012 17:00:19 GMT -5
We have a 393w 10.5 to 1 but with 170s trick flow pump gas engine we had our best luck out of autolites 3933 gapped at 35.. We also used 3932 at 35..
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Post by 88mustang on Apr 16, 2012 19:33:07 GMT -5
thanks jparker 1229
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Post by krobinson on Apr 17, 2012 17:28:49 GMT -5
NGK R5671A-9 Stock# 5238
Few bucks cheaper and read alot better to the naked eye.
I buy mine from rock auto in bulk about 1.60 each
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