Sparkin Plugs

Old 11-18-2007, 11:22 AM
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Join Date: Aug 2007
Location: Bedford, Ohio
Posts: 86
Default Sparkin Plugs

Wondering if ya'll have suggestions for plugs for me. Working on a couple of SBC new builds. What is the best way to determine what plugs to use? Planning on doing a dyno tune to one of them, but not sure when I can afford (or if yet) the dyno, plus, I should show up with some plugs. I know how to watch the plugs and what to look for, but where do I start? (without buying and trying)
406 3.750 strk/6" oliver rod/1.125 comp ht with SRP domes/13:1 to 14:1 compression/dart 220s,angle plug-58cc/super vic/holley 850/110 or C12 gas/circle track asphalt, all on a sesame seed bun.
Help would be appreciated, guessing to try (if I have to buy and try) Autolite AR131 cold
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Old 11-18-2007, 12:02 PM
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Join Date: Jul 2007
Location: Florida
Posts: 635

NGK R5671-7 or 8 or 9 (hotter to colder) will get you close. Go 8 or 9 with iron heads, they have 10 and 11 for boosted or heavy NOS.
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