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(man/dude)
Join Date: Aug 2010
Location: Thunder Bay, ON
Posts: 5,500
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I had no end of trouble with tuning the MFI until I gave up chasing AFR's and concentrated on what the motor likes. My motor doesn't seem to respond to anything over 12:5 either.
It's probably worth a bigger discussion, but these cars seem to like a much richer AFR than ideal. I'm sure there are many factors but it must have to do with the fact that richer than ideal mixtures burn faster.
Unless you can find a pro who knows aircooled cars you might be better DIY'ing the tuning in the long run.
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