stock 2v with the 8psi vortech kit (non intercooled) vortech supplied tune. I installed my kit exactly the way vortech suggested in the instructions. The car knocks with 93 even with octane booster. It seems to knock more under long WOT pulls. I'm assuming this has to do with heat building up in the charge pipe. Vortech suggests the stock spark plugs (copper) and stock plug gap. My question is should I try colder plugs or less plug gap or both. I gapped the plugs to 0.040". I've never really been clear of the effect plug gap has on pinging. Thanks for any help guys!