Perry,

Do you have a turbocharged engine or NA?

Doug Fir

It's stock 1986 NA.
In the early days (1999) I was worried about the EFI not being a
redundant system, but it's reliability is now proven (it was "proven"
anyway in car use). Redundancy is only needed for failure prone systems,
such as  magnetos.
The only redundancy I have is a dual battery system, independently
selectable but I always run "both". Two sealed r-g lead-acid batteries.
I've  never had a battery failure either, I replaced the originals after
5 years, running on the second set now.

Perry

I also might add, Perry is a very talented professional electronic engineer
so EFI holds no mysteries for him.

Now on the other hand (correct me if I am wrong Perry) he still has
not got it to lean the engine manually :)

I still think you need to try a pot in the mass airflow sensor circuit Perry.
-- 
Paul Lamar ...No rotor no motor.

Perry,


Thanks.  Sound like you have a KISS system to me, and it is proven now. What
is the highest altitude you have flown your bird?  I will be going EFI as
well by choice but then again for various reasons I also don't have a
choice:)  I really don't know what all the phobia is about. With a little
study anyone can master the basics of modifying the standard auto CPU.  For
safety sake pot the board, and use a back-up if desired.

If Megasquirt would work with a mass flow sensor than I would consider that
route.   I've given up on using Tracy's unit and it is for sale if anyone
needs one real cheap.

Doug Fir

One of the stock sensors to the ECU is atmospheric pressure sensor. On
long trips I cruise between 10.5 and 12.5k. I did take it up to 14.0k
once just to prove it out. The legal limit without oxygen for up to 30
minutes. It never misses a beat.

Perry


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