8.1L Timing - How low is low?
04-20-2013, 07:33 PM
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8.1L Timing - How low is low? I have seen several posts where folks say the 8.1's like low timing?
How low is low? How far should I go? Motor breaks up in the 2500 to 2800 rpm range. HPTuner scanner shows I am still getting some knock retard in this range. I started with the stock curve from a 2003 suburban and have been adding fuel and taking out timing. AFR's are pretty good, so I am assuming it must be timing.
I have been taking out 1 to 2 degrees at a time. Should I be pulling timing in 5 and 10's instead?
For HPTuner guys, tune file and log file attached. (Also any other bonehead mistakes you find in the tune file let me know)
How low is low? How far should I go? Motor breaks up in the 2500 to 2800 rpm range. HPTuner scanner shows I am still getting some knock retard in this range. I started with the stock curve from a 2003 suburban and have been adding fuel and taking out timing. AFR's are pretty good, so I am assuming it must be timing.
I have been taking out 1 to 2 degrees at a time. Should I be pulling timing in 5 and 10's instead?
For HPTuner guys, tune file and log file attached. (Also any other bonehead mistakes you find in the tune file let me know)
