I have a Question about spark advance and i was hoping someone could help me out. I have the software Engine analyzer pro and drag race pro from performance trends. There is a section where you can specify different spark advance curves for max performance. My Combo is: 347 mexican block 10.75-1 cr Solid roller cam specs:281/285 adv 247/250 @.050 - .624/.624 lift @ .050 1.6RR ratio - 114 LSA - 110 ICL Victor Jr. cyl heads, Out of the box Track heat intake - 75mm TB - 90mm FFRP MAF All motor What would be a good curve for this motor at 80 to 100 % load? 1995 mustang gt CBAZA Strategy ,Tweecer RT Strickly a bracket car, NO street time at all Thanks Larry
Let me ReWord this post. Sorry for the confusion. Lets say with my above combo that 34 degrees advanced was the maximum spark without pinging. At what RPM should this amount of spark advance "34 degrees advanced" start? or should different degrees of spark advance start at different steps in the rpm range to create a broad spark curve? What would give me the most power?? Remember this is a footbrake Drag racing bracket car that strickly runs at WOT Thanks guys i need your help on this one Larry
I've always setup my street cars with total amount of 34 to 38 and I've always setup the curve so it is all in by 2500 Aggressive ... Yes ... High Octane Required ... Yes Been using that method W A Y back there A bunch of years before there was ever a pcm involved :Word: We used to use only one spring in the mechanical dizzy or If we could find em ... soft springs bought from some speed shop Of course ... The idea was to get the advance to be quicker Now ... When I got my little 95GT I found when the E7 heads were stock and The pcm was untouched All I could go up on the dizzy was about 4 to 6 before ping which would have been about 29 to 31 total advance I'd bet you'd do well to do it like we did back in the good ole days As for drag racing ... No Different Really I mean if you are serious about it ... Ya ain't gonna let the rpm's fall below 2500 ... Are Ya Grady
thats what i thought too Grady. I just wanted to verify because of the ECM. As always thanks for the response Buddy! Larry
