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1977 L-82 Plug Gap - Please

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Old May 24, 2009 | 10:52 PM
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Default 1977 L-82 Plug Gap - Please

Hi,

I just bought a set of plugs and the store said to gap them at 045. The manual that I have (Corvette 66-82 Shop Manual, not Haynes) says 035. I have an HEI dist.

Thanks
Jack
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Old May 24, 2009 | 10:57 PM
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.045
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Old May 25, 2009 | 08:50 AM
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Originally Posted by calwldlife
.045
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Old May 25, 2009 | 09:25 AM
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Hello,

Higher voltage ignition equals larger gap on the plug. Go with the .045, better gas mileage and some extra power.

Enjoy the new plugs.

Douglas in Green Bay
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Old May 25, 2009 | 09:49 AM
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Points and condensor=0.035
HEI=0.045
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Old May 25, 2009 | 11:52 AM
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.045
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Old May 25, 2009 | 02:39 PM
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Gracias!
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Old Aug 25, 2011 | 12:44 PM
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what is the gap on a stock L82 engine? still .045 or .035
also, which plugs do i need? Ac delco R45TS?
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Old Aug 25, 2011 | 01:01 PM
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Originally Posted by greg biz
what is the gap on a stock L82 engine? still .045 or .035
0.045" if you've got HEI

It false to state that a larger gap will give better fuel economy or more power, more bad science. If the mixture ignites a bigger or hotter spark won't make it burn faster, hotter or cleaner.

Last edited by Mike Ward; Aug 25, 2011 at 01:26 PM.
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Old Aug 25, 2011 | 02:46 PM
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Originally Posted by greg biz
what is the gap on a stock L82 engine? still .045 or .035
also, which plugs do i need? Ac delco R45TS?
Tune up sticker and owner's manual will tell you what you need.
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