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If I recall correctly, the
air/fuel mixture number was
somewhere around 13... Make any sense?
Yep, sure does.
The theoretical ideal air fuel ratio (AFR) is 14.7, but that doesn't mean much
to us. Any number lower than that is richer, and of course
higher numbers are leaner. Max power mixture is richer than
14.7, and I'd suspect it might be close to your 13, but I'd also bet that it
depends on lots of other things as well. During lean cruise, you
will likely see numbers way up in the teens.
My old FD had a Power FC
computer, and a wideband O2 sensor. I had it tuned to around 11 AFR for
full throttle, full boost, around 14-15 for normal cruise, and I could even see
the max of 20 on very light throttle cruise. 11 AFR is pretty rich,
and is needed to avoid detonation with the turbos, but it shouldn't be needed
for a NA engine. Bottom line is that you'll have to do some testing to
finish setting it up.
Rusty
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