So under hard acceleration I noticed today I hear a popping sound. Like 2 or 3 pops almost like a misfire. It doesnt sound like detonation. My plugs are gapped at .022 and my air fuel is right around 11.2 with 10 degrees ign advance on e85 d16y8 21psi boost from a garrett 57 trim, log manifold, stock head. What do you guys think?