Spark Plug Gappin

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May 3, 2003 | 11:23 AM

1982Camaro383

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Joined: Dec 2000

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From: Madison Heights, MI, U.S.A.

Spark Plug Gappin

Question for you guys I have a 1982 Camaro with a 350 Chevy, with a full msd ignition. What is the best gapping to use for a compression ratio of 9.8.1. .050-.060 what is the best gap to set them at. I am using NGK TR5 plugs. Any help would be greatly appreciated.

Thanks,

Justin

1982 Camaro

May 3, 2003 | 11:35 AM

ede

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Joined: Aug 1999

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From: Jackson County

i'd start at .045 to .050 and go from there

May 3, 2003 | 11:39 AM

1982Camaro383

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Junior Member

Joined: Dec 2000

Posts: 81

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From: Madison Heights, MI, U.S.A.

MSD says with up to 10.5.1 it should be at .050-.060, 10.5-13 at .040-.050 and 13 and about at .035-.045. I am running at about 9.8 with vortec heads

May 4, 2003 | 08:37 PM

Twilightoptics

Supreme Member

Joined: Feb 2000

Posts: 1,170

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From: Seattle, Washington

Car: '87 IROC-Z/'82 RX7

Engine: SBC 355/1.1L Rotary

Transmission: T56/5 Speed

Axle/Gears: 4.33/3.93

I'm running my '350 with MSD 6AL/Blaster Coil and Gap at .045. Stock for my car was .035... stock for the heads with TPI was .045. .045 works for me. I don't see alot of benefit from over gapping.

If you go too big, you'll actually feel a decrease in power, but you wont feel any gains. IMHO.