When I pull them out, they are very black but the car still pulls like crazy. I can't really notice any black smoke on boost since my high speed runs are at night. I will be dynoing in a few weeks and see if my problem is resolved.
:with the ignition amp you should be able to run .038 without a problem. If you are burning tips off it is because the gap is to tight. If they are fouling out and really black when you pull them you will need to do some tuning.