Not sure if anyone will be able to help me out in this section but it's worth a try. Is there anyway to tell how much I'll need to retard the timing when I spray if I have the spark advance and knock numbers? I have them on my autoxray at home and could post the numbers if someone can help out. I guy did some tuning for me and now I can't get hold of him to figure out what I need to do to correct the problem.

Thanks