Hey guys, I am needing some advice on selecting a spark plug. I have a 421 SBC on alcohol. The compression is 14:1 I have a MSD 7AL-2 with a baster coil to provide the spark. Not too familiar with alcohol. What plugs would yall recommend. Any help or advice would be greatly appreciated.
Which heads? If you have Brodix heads you can go to their website and they have recomendations. I run the NGK plugs which they call for with Track 1's
Zip.
They are Pro Comp aluminum heads. Don't know that much about them. 190cc intake runners
2.02 intake 1.60 exhaust SS valves
Also what gap should I start at?
My Enderle Alcohol injected Altered has a 13.5:1 sbc 434 with Brodix 11X heads and I run NGK B9ES plugs gaped at .035 and I run an MSD7AL3 with a Pro Power coil. Very reliable with no issues.