Spark plug gap

[Mayhem]

Since I can't get an answer from anyone on specifically what the gap should be, I am regapping them back to .040 where the old set was. I can't believe .005 would make such a huge difference.

At least I know how well it ran at that gap. I still welcome input for what it should be.

Again: 350 1980 Corvette engine (apparently an L82), aluminum heads/intake, 292/501 cam, 10.5:1, 50/50 mix of pump gas and 111 leaded fuel.
(apparently the vette engine part makes a difference in plugs from all other 350's-not sure why).

I will likely buy the MSD dial adjustable timing setup later to fine tune it for different variations and temps.

Thanks all.

[Verne_Frantz]

Rather than asking everyone what the gap "should" be for your car, why don't you just set it where the car runs best???? Afterall, isn't that what you really want??

Verne [img]<<GRAEMLIN_URL>>/rolleyes.gif[/img]

[Mayhem]

Yes, but as previously discussed, one of the plugs are a #$@!%!!! to change due to the header blocking it, and having to drop the header to get to it. If it were easy, I wouldn't even ask.

[VintageMusclecar]

I've found .035&quot; is a good all-around setting.

Bigger gaps can work with an arc welder ignition system, but the bigger the gap the more strain it puts on the ignition system, not something you want/need on the street--even with an HEI.

My $.02

[Mayhem]

Thanks. I set them back to .040 today, but it is cold &amp; rainy, so I can't test it out. I know it ran good before at this gap.
I will either get another set or regap these at .035 when it is warmer and I can test.

Thanks for the response.