you might even just try a heat range colder plug. Or maybe close the gap a little on the stock one. The draw back to that though is you must let the plug come up to temp before racing on it...... Do you have a laser temp gun? If so, can you take a temp reading right after a full throttle run?
Plug temp is what I'm looking for. When it warms up, I'll baseline mine with no pea-shooter, no lid, and cherry bomb installed. Since its going to be sooooo cold this weekend, I might go ahead and see if the ECU can be chipped. Or if its just a flash setup directly from a cable.