Ed  Carver came up with a good idea for leaning Megasquirt systems.
It is quite  simple. Lower the fuel pressure.

It is a good idea the keep the fuel  pressure regulators on the engine side
of the
firewall for fire reasons  so mount it in such a fashion that a shaft can
be uses to
operate the  adjusting screw from the instrument panel. Not so easy with  a
pusher.

Paul Lamar

Attach a bellcrank to a short adjuster  shaft, and then use the bowden cable
normally used for mixture  control.  Not too bad for a pusher.

Be sure to have a spring on  the bell crank which pulls it full rich.  In
case the cable  breaks.

Matt

Or, Set the regulator a bit too rich then bleed fuel to the return line
through a Model plane style needle valve to reduce fuel pressure. Or,  have
the primary regulator set too rich and use the needle valve to  vent fuel to a
secondary regulator set a bit too lean. Spin the needle with a  standard
choke cable or similar.

Similar to used on Dynos.

Lynn E. Hanover

One of the things I like about this approach is you know exactly where you are by
looking at the fuel pressure gage.

Paul Lamar


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