My question is what would be a good setting to try on spark advance and fuel curve on my diablo. Its 2004 gt with auto and stock gears.. my mods are borla stingers, mrt h-pipe,steeda udps,k&n cai, accufab 75mm tb and plenum and of course the diablo tuner.
Based on this article http://www.corral.net/forums/showthread.php?t=636548, I'd max out the timing advance and back it off if you hear pinging. I wouldn't touch the a/f without seeing wideband a/f readings from a dyno.
I had the part throttle shift firmness about halfway up on the scale, and the WOT shift firmness like 3/4 up.
i just left it as is with the spark and A/F until i got a dyno tune....... but on part throttle shifting i went up half way and WOT 3/4 up to firm also leaving the 3-4 stock cause you don't want to blow O/D at WOT and have tranny porblems