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Old 10-01-09, 01:30AM   #1
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Default Plug gaps and forced induction?

For 5-7 psi with a MSD box and a Petronix coil where would a good starting point be for gapping plugs? I was running .048 N/A, I'm guessing .035ish?

Thank you,
78 T/A 463, Ultradyne custom cam, very ported Greg Merrick Heads, TH400, 3.31 12 bolt, 3425lbs

81 T/A 350 sbc vortec heads 4 speed 3.42 posi
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Old 10-01-09, 01:41AM   #2
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I would start around .030, if you get any spark blowout you can back it down.
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