A/F and Timing tuning tips Needed
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A/F and Timing tuning tips Needed
Have a 410SBC with a FAST computer, 11-1 and AFR heads. Trying to tune it. Base timing 6°. Why does the following happen-
Move the timing at idle to 12° the headers get red with a 13.2 A/F reading at the WBO2. Continue to make it richer but they got hotter. Should I have gone leaner?
Move the timing at idle to 27° the headers cool and I can get a 14.7 A/F reading at the WB02. The only issue I have with this is after I come off the road to an idle the cat will turn light red after ~1 minute. I cut the timing back and the red goes away. But by cutting the timing back the headers then begin to glow. Any comments welcomed.
Frank
Move the timing at idle to 12° the headers get red with a 13.2 A/F reading at the WBO2. Continue to make it richer but they got hotter. Should I have gone leaner?
Move the timing at idle to 27° the headers cool and I can get a 14.7 A/F reading at the WB02. The only issue I have with this is after I come off the road to an idle the cat will turn light red after ~1 minute. I cut the timing back and the red goes away. But by cutting the timing back the headers then begin to glow. Any comments welcomed.
Frank
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