ok , using tuner pro with the stock chip and an aftermarketchip(hypercrap) the graph(using tuner pro) shows it adding 1 degree of timing at 2000 rpm , 9.14 degrees at 3200 rpm , drops to just adding one more degree @ 4800 rpm.I can't understand why this happens at the same rpm in both chips?why such a spike? why so much timing at 3200 rpm? please help. it is the same on a 89 corvette and an 88 pontiac gta5.7. This make no sense to me ?

 

You're looking at the power enrichment spark adder tables. You have to take those tables, and add them ontop of your Main Spark table at the given load to determin your actual timing. Your main spark table may be high enough in the upper RPM range that no additional timing from the PE circuit is needed.

Though adding a few degrees on the high end of the PE spark helps.

I don't run any power enrichment spark. I have my main spark table do all the work.