Yes I am still flying, trying to sort out idling

problems. I am having

trouble keeping Tracy's ECU programmed to give a smooth

transition from

power to idle. The ECU1 makes this transition at 16"

MP. Below 16" only

the

primary injectors are fired, at double the "on" time.

My engine behaves

erratically below 16" and it changes due to factors

like uneven mixing

of

2stroke oil with avgas (all I can find) on

cross-country trips, and

variable

(crankcase) oil consumption due to my overheated rotor

[oil scraper] "O"

rings.

I got a new rotor housing from Mazdatrix so I will put

the new engine

together with your TES orings soon I hope, probably

will not install it

before Sun-n-fun. Yes I hope to make it there again

this year and

looking

forward so seeing everyone there. A group flight might

work if you can

stop

in Safford (SAD) My friend in his Apache twin will

likely be going also.

160

MPH is about all I can do anyway!

BTW I wonder if I look like Jessie's racer on short final?

Chuck Dunlap

That is strange. Tracy's engine works perfectly.
Are you sure your injectors are in good shape. Sometimes

they dribble

rather than spray.

Paul Lamar

I had my injectors cleaned and tested a year ago, the before and after tests
were not much different.
Don't have a firm plan yet as to which day, when are going? We usually use
123.45 for air to air comm.

Chuck,

    I have found in my installation that around 15-16" Hg

manifold and

approx 2800-3000 rpm that I need to program the system in much finer
increments of Manifold pressure and rpm than elsewhere.  If

I do not,

everything is fine at idle and everything is fine higher

than 3000 rpm but

as I increase from 2000 up through 3000 the air/fuel

indicator will shift

from rich to an lean indication and the engine will stumble

a moment.

Interestingly enough I don't notice it in the air.

Ed Anderson

Thanks, Ed I will try that. It is hard to get it to stay at a steady MP
around 16" because it appears to lean out as it drops below the staging
point, then MP increases and secondaries kick in again. It surges at about a
one second cycle. I can stop the surging by manually richening the mixture.
I don't notice it in the air either, except sometimes when throttled back on
short final. Mostly does it on the ground when taxiing by onlookers :-)

Chuck Dunlap

 
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