----- Original Message -----
Sent: Thursday, January 13, 2005 2:20
PM
Subject: [FlyRotary] Re: I got the power
!
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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