MRE-FB wrote:

You wrote:

"BTW Francois most people use four injectors on the rotary and stage
them.
In other words only two are used at low power for good mixture control
and all four are used at high power. Tracy Crook at
http://www.rotaryaviation.com/
builds an EFI/IGN computer with dual redundant processors that achieves
this configuration."

We also use 4 injectors and also have redundant processors.  However,
contrary to Tracy's ECU, each one of our boards (we call them CIANs for
Numerical Injection and Ignition Controllers... in French) runs one
injector on each rotor.  This way, should we lose a CIAN on take-off,
the engine hardly notices and keeps its rated 220 t/o HP.  That is, if
we can feed it enough fuel on only 2 injectors.  With the biggest Bosch
injectors, we achieve a bit over 180 HP on 2 injectors... good but not
good enough.  So we need bigger injectors.  I know Siemens and Delphi
make bigger injectors for car (dragsters?) racing, but I'd like to know
if someone has experience with them at less than full bore!

Thanks for the help.

Francois

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