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Message
I got up to 5100 rpms static, and most people
told me that the prop would most likely unload in flight. How can I obtain
more than 5100 rpm's unless I fly it?
Hi Paul,
I asked Tracy that same question when I was first tuning my
EC-2. The answer (for his unit) was that it didn't matter. The
system bases it's fuel injection pulse width on MAP, which will be nearly
the same in static runs as it is in normal climb speeds.
When your prop unloads in flight, you run higher rpms, but that doesn't change
the pulse width requirement for each intake cycle at a given MAP. It just
means you need more pulses, because you have more intake
cycles.
It's VERY important to realize that everything I just
said was based on Tracy's EC-2. There's a very real chance that the
MicroTech DOES care what the rpm is. I know that the Power FC
computer in my FD had a fuel injection and timing table that was based on RPM
and MAP. This gives you more power to tune, but as they say, with power
comes responsibility :-)
FWIW, I really do like the MicroTech unit, and I
thought really hard about getting a couple for the single rotor project, but
eventually went with what I know, which is Tracy's EC-2. Part of
that decision was based on having a backup controller if I ever suspected a
problem, though it sure would be nice if someone would include the ability
to save and restore tuning parameters (between slathering foam and
fiberglass on a clapped out travel trailer) :-) I also
like the built in backup (which would have ruled out an EFI tuning
issue for you), and don't quite know how you'd wire two MicroTech's
together. I also like the mixture knob, which is powerful enough to
overcome almost any tuning mistake. I also felt it was safer for me to
have only one unit to try to remember.
Hang in there Paul. Give this
some thorough consideration before doing anything drastic. I seem to
recall you giving me some similar advice not long
ago.
Cheers,
Rusty
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