Hi Rich
"Can anyone verify these "non"
differential fuel pressure readings?"
"Non"
differential numbers are useless unless you know a lot more
information.
You need to know differential pressure going to
the carb float bowls over airbox pressure to help you figure if you have a
problem >>>>>>>>>>> period.
Measure airbox pressure in absolute terms and fuel pressure in absolute
terms and make sure fuel pressure is between 2 and 5 PSI over airbox
pressure.
Now when you start increasing MP tell us if it
ever falls below 2 PSI.
I guess if you really wanted to,
if you think your fuel pressure gauge is accurate, add to it the weight of
the air that is above you, then add an inch to MP pressure, now subtract
what your fuel pressure gauge is reading plus the air above you, from the
MP plus one inch. If you are between 2 and 5 PSI above with fuel pressure
you are OK. That is the verification you can do yourself.
Why
don't you just buy a differential transducer from UMA and either one of
their gauges or run one of yours from it? This way you can see if you have
a problem "RIGHT AWAY" when something is going on.
If
you take off and either overboost or something else has a problem, instead
of waiting for your motor to play silent night or slump, you can reduce MP
till you get at least 2 PSI and can be fairly sure you can maintain that
power setting.
If you fly a 914 IMHO you want differential
pressure information.
Ron Parigoris
|