Al Gietzen wrote:

There is an interesting anomaly in  the EGT data from the dyno run that
I can't explain; maybe someone has an idea.  For the most part the EGTs
of the three rotor were relatively close and consistent.  Some variation
in spread with rpm that I would expect from different air/fuel flow
characteristics.  The thing I can't figure is this:

Most of the operating was done rich of peak, and at 5000 rpm EGTs were
within about 50 degree range with rotors 1 (the lowest) and 2 very
close, and 3 the highest.  Maintaining rpm at 5000 by reducing load as
mixture was leaned (EC2), the EGTs crossed and spread out, so that by
about 150 lean of peak rotor 3 was the lowest (1510), and rotor 1 was
the highest (1595.  MAP was constant at about 24", rpm constant, so air
flow didn't change. ).  I assume that the injector pulse width was
reduced by the same amount on all three rotors.  What gives?  It seems
it might be important to know.  Tracy?

Al

 
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