spark advance curve modification

[Dave Zug]

I have a turbo car (8.7:1 compression, 91 octane required) with a GMP4 
ECM. I KNOW where the spark curves are on the eeprom, my question is:

can someone give a description of a baseline tequnique i can use to 
modify the spark table for "mild/medium" performance increase?

example: increase advance for the lower load lines 1-2 defress, and the 
upper load lines 3-4 deg,  or increase beginning of all lines 1 degree, 
middle of lines 2-3 degrees and ends of lines 1-2 degrees..

engine is MAP controlled, not MAF and HAS ELECTRONIC SPARK CONTROL with 
knock sensor.. can i rely in knock sensor to protect against possible 
over-advance on eeprom if i accidently use a "FA" insted of "2A" ?

sorry if i left out vital info for an answer, i'll revise it with any 
requested info and re-mail if so.

thanks.

dave 
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"still waiting for a DIY issue i can contribute to, though it looks 
unlikely, I wont give up."
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