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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Jun 2004 Posts: 8,597 Riding in the Passing Lane | | Riding in the Passing Lane Joined: Jun 2004 Posts: 8,597 | A wider gap helps drivability a little. Its like a bigger match. They claim a smoother idle. I wouldn't go beyond .045 though on a Chev. When HEI first came out they were running very wide gaps, like .060-.080. They had some problems with starting in damp weather, especially Chev. so they lowered it to .045. The heat range is the path the insulator takes to transfer heat to the shell. The insulator should run white to light grey. If it carbons up it or gets a red varnish it is too cold. If it blisters & erodes the electrodes it is too hot.
They say money can't buy happiness. It can buy old Chevy trucks though. Same thing. 1972 Chevy c10 Cheyenne SuperIn the Gallery Forum | | |
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