Since we had a rare sunny day up here in  Seattle, I went up flying for
an hour after going through the mode 3, 6, then autotune and then a
little touch up in mode 9, on the ground. It was running  pretty smooth,
but still does not like full throttle- maybe it's still a bit lean up
there, but I'm thinking that maybe the Hushpower is too restrictive- I'm
flying on  60% throttle, tuning with the mixture knob and the EGT is
running around 1700, RPM is ~5000, MP- Damn, forgot to note- maybe 17"?.
Funny thing, the coolant and oil is down around 110 f at these settings.
Definitely need to block some of the cooling air. I don't know if the
Dynon airspeed needs calibration, I did not have my GPS today, but was
only getting about 110 MPH at that throttle setting. I did get one thing
accomplished- I calibrated my AOA on the Dynon.

I'm starting to think about making my own very simple, robust muffler
out of 321- pretty much a straight 2" tube within a 4" tube, with some
holes and a few very firmly welded baffles. I'll try to get   a drawing
out and see what everyone thinks about it.


At least no one called the tower to report an aircraft in distress this
time.

Brian Trubee

I doubt the muffler is the problem. Unless of course it has already failed
internally. You can look inside with a Home Depot or Harbor Frieght bore scope.

What is your fuel pressure again?
What size fuel line are you using? It should be AN dash 6.
How many gallons an hour are you burning?

How are you with electronics Brian?
A data acq system would go along way to take out the mystery.

My plate is over flowing from here to the end of April but
after that I will be able to help.

Paul Lamar