exhintake..now runs best at FULL TIMING??
#1
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exhintake..now runs best at FULL TIMING??
so i had a successful exhintake instal along with a super duper custom air intake..pics on request.
my question now is: why does this engine seem to run best with the ignition timing completely maxed out?? no signs of detonation at all..i backed it out just a couplr deg. just because this is strange.
any thoughts?
197.5 on the cam..afm is after the filter and no leaks. just for the nerds, i measured the intake pressure in the area where air is being picked up from @ about 1/10th to 1/20th of a p.s.i., in the cowl/ wiper area.
definitely picked some mental horsepower...yeah
my question now is: why does this engine seem to run best with the ignition timing completely maxed out?? no signs of detonation at all..i backed it out just a couplr deg. just because this is strange.
any thoughts?
197.5 on the cam..afm is after the filter and no leaks. just for the nerds, i measured the intake pressure in the area where air is being picked up from @ about 1/10th to 1/20th of a p.s.i., in the cowl/ wiper area.
definitely picked some mental horsepower...yeah
#8
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Maybe the head has been resurfaced more times or at a greater cut than I am aware of?? Maybe I need to try running the exhaust cam one tooth retarded? Or an adjustable gear perhaps?
#10
I also have a built 94 motor with exhintake cam that I swapped in this weekend.
Max timing on the cas will only read 12 degress with timing light. (Is something wrong here?)
I am getting some pinging at light throttle around 3000 rpm.
I am not sure if this is because of the slight vacuum hiss around intake manifold that needs to be looked at.
Or old fuel... (3 months old, but it was 94 octane)
Or possibly clogged fuel filter.
Or I need an MS with a tune? 84mm 8.6 supetech, stock ECU will be able to run this, no?
Max timing on the cas will only read 12 degress with timing light. (Is something wrong here?)
I am getting some pinging at light throttle around 3000 rpm.
I am not sure if this is because of the slight vacuum hiss around intake manifold that needs to be looked at.
Or old fuel... (3 months old, but it was 94 octane)
Or possibly clogged fuel filter.
Or I need an MS with a tune? 84mm 8.6 supetech, stock ECU will be able to run this, no?
#20
also the rubber damper could have moved on its axis (meaning it should be replaced).
how to accurately locate TDC:
How To Degree Cams
how to accurately locate TDC:
How To Degree Cams