spark plug gap

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Old

Jan 30, 2012 | 05:11 PM

#1

4x4man514

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Tuned

Joined: Jul 2003

Posts: 359

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From: ga

spark plug gap

hey guys, ive got a 393 , aluminum heads, moderately built with a lightning efi system on it. any thoughts on what kind of gap i should be running on the plugs? thanks!

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Old

Jan 30, 2012 | 07:45 PM

#2

BaronVonAutomatc

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Joined: Mar 2005

Posts: 2,949

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From: Earth

Off the top of my head I'd recommend ~.045" for starters. If you're feeling adventurous open the gap up ~.0025 at a time until it starts to stumble at WOT and then close it up one step, measure, remember for future reference.

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Old

Jan 30, 2012 | 08:28 PM

#3

4x4man514

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Tuned

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From: ga

thanks alot!

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Old

Feb 2, 2012 | 07:54 PM

#4

critterf1

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Joined: Feb 2010

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From: Newport, N.C.

.044 should work nicely.

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1956, 2001, 351w, 50, 79, ford, gap, plug, plugs, ranchero, spark, sport, trac, trucks, v8

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