Spark Plug Gap

[xdig]

I need a recommendation for spark plug gap in my SL. I know that this subject has come up before but I haven't been able to find a recommendation for my particular application. Any help would be appreciated. I will be running RN9YCs at 18-20 psi and I am running an MSD-6A and MSD wires with a Rich Bryant cap. Also, a ported 782, ported 2-piece, ported EM, Taft S2, +40s, 3-bar, 46-trim .63 AR, and fuel pressure at 55 psi. Thanks, David

[cordes]

I would start off with them gapped at stock and reduce it if you're blowing it out. IIRC stock is .32.

[BadAssPerformance]

With the MSD box you should have no problem with them at .035" stock gap :thumb:

[xdig]

Thanks, I had been running RN12YCs at .035" with previous set-up at 15 psi. I wasn't sure with the higher boosts if I should reduce the gap. Thanks again for the help. That is exactly what I wanted to know.

[BadAssPerformance]

A lot depends on what cal you're running too... if you have some crazy triming in it, then it doesnt matter how much gap or how cool the plug is.