Opinions on SDSEFI

[Brian Michalk]

I joined this list a couple of months ago.  My goal was to find a reliable
fuel injection system for my engine.  I bought KE jetronic parts because the
solution  was entirely mechanical, and appeared to be reliable.  Well, it
turns out that the KE doesn't work very well for my application, so I
studied the problem a little bit more.  After a couple of months of head
scratching, I've narrowed my search down to the SDS EFI EM-6F
(www.sdsefi.com) system.

Some of you guys figured out on your own from my descriptions that I was
trying to find something to work for an aircraft engine.  It turns out that
the SDS folks have sold a few installations to airplane guys, it appears
they aren't as touchy as Americans are about the threat of litigation.

First, I'd like to hear if anyone has any comments about the SDS systems.  I
like them because they are simple, and this means fewer components to break.

Second, I'm trying to solve a redundancy problem.  I really don't want two
EFI systems; I'd rather have two very different animals.  For redundancy,
I'm looking for a single injector that can make about 250 horsepower.  It
doesn't have to be sexy, but it does need to work reliably.  My thought was
that I could tap off the fuel rail and go through a metering needle valve
before the injector.  This would mean a single control for the needle valve.
Yes, I know the fuel is unmetered.  I would be required to fiddle with fuel
flow and airflow to get the thing to work right.  Is there some other way to
meter this injector?  Manifold pressure perhaps?

I've got dual batteries, mechanical and electric fuel pumps for the rest of
the redundancy.

Thoughts and opinions welcome.

 Brian Michalk  <http://www.awpi.com/michalk>
Life is what you make of it ... never wish you had done something.
Aviator, experimental aircraft builder, motorcyclist, SCUBA diver
musician, home-brewer, entrepreneur and SINGLE!

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