Martin Orro wrote:

Paul,

        I envisioned this on a NA peripheral port - two runners only.  Previous
posts were concerned with hi-volume injectors.  My concern is simplicity
in the system.  Minimum part count, less hi-pressure fuel connections,
removing the fuel system from the exhaust side of the engine, enclosing
the injectors in the plenum to further isolate them from heat are a few
of my goals.

        Again - would Tracy's EFI controller work with two TBI injectors?

                Martin

Why only two runners? Runners are like rocks. They NEVER fail :-)
You are not using the intake manifold shown in this picture
are you? :-)

You will have to ask Tracy. I would say the dynamic range of
the TBI injectors might be a problem but I could be wrong.

I know Tracy stages two of the four injectors. That kind of
provides a fail safe system and a wide dynamic range with two 
injectors per rotor. If one of yours fails you will be at least 
half down on power for sure.

Dynamic range when applied to a fuel injector needs some
explanation. Fuel injectors have some minimum pulse width
where they stop working. If the squirt hole in the injector is
big enough to pass fuel for full power too much fuel
may come out for smooth running at low power and at the minimum
pulse width. So it is better to use smaller squirt holes and two
injectors per rotor. One per rotor is used at low power and two
per rotor for full power. Plus I suspect the spray pattern
with a smaller injector is better at the minimum pulse
width.

Paul Lamar
 
The Aircraft Rotary Engine Newsletter.              Powered by Linux.

http://home.earthlink.net/~rotaryeng/            http://www.linux.org