spark plug gap on 383
Thread Starter
Junior Member
Joined: Jan 2005
Posts: 22
Likes: 0
From: indiana
Car: 85 trans am
Engine: 383
Transmission: 700
spark plug gap on 383
just a general question. usually gap my plugs at .60. have heard some gap them at .45 for 383s. just wondering if eiter gap is better or makes a difference
Senior Member
Joined: Nov 2003
Posts: 953
Likes: 0
From: Waterloo, Iowa
Car: 1992 Camaro RS 25th Aniversarry Edition
Engine: 305
Transmission: TH-700-R4
Axle/Gears: 10 bolt with 3.23's and SLP Posi.
The longer the gap the hotter the spark, but takes a tremendous amout of voltage so you need a coil that can jump the gap. run the largest gap you can jump without predetenation.
Supreme Member
Joined: Jan 2003
Posts: 2,133
Likes: 4
From: Houston, Texas
Car: 88' IROCZ
Engine: 388 TPI Motown 350 Race block
Transmission: 700R4
Axle/Gears: 2.77
The AC Delco Rapid Fire plugs I run come gapped @ .045". I regapped them to .038" on my 388 after I was sure it wasn't detonating (10:1CR fast burn alum heads.)
Plug gapping
another site
Plug gapping
another site
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evilstuie
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