Your points are well taken. The cost of just replacing the O2 sensor
is not
exorbitant.

Is there any really easy way to tell what engines are available with
non O2
sensing ECMs?


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I would assume any engine that is marketed to a foreign country that
doesn't require the use of unleaded fuel would be compatable. I know
for sure the GM LS1 series are available with both style puters, I
think the Caddy northstar engine comes that way too. There are
companies that manufactuer "test" units that mimic O2 sensors so that
is an option. On my Firewall forward package I kept things VERY simple.
One Holley carb with the Mcneilly mixture leaning block installed gives
precise fuel metering, is cost effective and bulletproof. In my
application I have a high wing so if by a million to one shot I lose
both fuel pumps ,gravity flow should keep the motor running till I get
her down safely. My ignition system consists of dual MSD boxes,one fed
throught the main buss and the other fed straight from the battery. I
run a Optima gel cell unit that has 950 cca and can deliver enough
voltage to run the ign for hours. The DAR that inspected my plane asked
that very question and together we calculed I would have to land three
times for fuel before the ign would fail from low voltage. I would like
to think I am not dumb enough to take off the second time in that
failure mode. G

Ben
www.haaspowerair.com