This seems pretty basic, but could use some advice. I want to try some different spark plugs.
The engine is a 301 ci Chevy with iron heads, 12 1/2 compression ratio, Carb on gas. MSD-6Al box and MSD 85501 Distributor. I have been running NGK R5670-7 plugs, 14mm, 3/8" reach, gasket seat with "J" ground electrode.
I want to try "cut back ground" plugs, using Autolite/Champion/AC Delco. It's kind of a buy USA thing.
Guys running a similar engine combo, what plugs are you using and what gaps? I think I'm using too small a gap @ .035".
I plan on having the Roadster on a Chassis Dyno before Bonneville and might try several different types of plugs.
Any comments would be greatly appreciated!
Tom