I had not previously made any adjustments
to Mode 3 or 1.
Today I tried turning up the manual
mixture to max and was able to get 4800 rpm. I also checked the Mode 3 at
22” and found that it needed to be increased. I increased it 10-12
punches (a lot) before it would center the monitor. I was then able to
get to 4800 with the mixture at center and 5100 with it all the way rich.
Now I have to turn the mixture almost all
the way lean to center it at low rpms. The injector flow setting is now
238. ???
I think I am on the right track, but still
need some work. I will bring the MAP data when I come Saturday.
Thanks,
Bill B
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On
Behalf Of Tracy Crook
Sent: Wednesday, October 24, 2007
12:25 AM
To: Rotary
motors in aircraft
Subject: [FlyRotary] Re: Fuel
delivery at WOT
Prior to running autotune you should manually tune to get mixture in
the ball park.
To give any more meaningful feedback I would need to know if you have
done any adjustment to Mode 3 and/or Mode 1? Could you get the same
result (as cold start switch) by turning up the manual mixture
control? What was your mixture monitor telling you during all these
tests? Are you out of range on the MAP correction table (already at
max?) Did you set Mode 3 at 22 - 24" MAP prior to making other
adjustments as suggested in the instructions?
But Ed's advice was good. The fact that you could get enough fuel
flow by doing anything at the EC2 tells you that the fuel system is capable of
delivering enough fuel (this assumes the fuel pressure was OK which your data
indicates is the case).
The snubber and diagnostic modes are not related. The diagnostics
went in some time before the snubber change. Don't know which version you have.
On 10/23/07, Bill
Bradburry <bbradburry@bellsouth.net>
wrote:
I have been concerned that I am not getting the static rpm
that others are getting with similar props. I have the stock Renesis with
the Performance Props 76 X 88. I seem to be limited to about 4200
rpm. I hit 4800 once the other day, but did not know what might have
caused the change. I just finished the install of the pressure overflow
bottle per Lynn's
msg of a while back and was running the engine up to try and eliminate any air
that might still be in the engine. I noticed that when the rpm reached
4200 or so, I still had about an inch of throttle left. After pondering
that for a couple of minutes, I pushed the throttle to the wall, the engine
started to run rough, and I reached over and flipped the cold start switch
on….
Mein Cod!!!
It immediately hit 5350!
Apparently I am not getting enough fuel flow to support high
rpm. I have not done the self tuning at high rpm yet, but I would not
expect that the fuel flow would be so low as to limit the rpm.
What suggestions do you have? My ability to self tune
has been limited due to cooling issues…especially at WOT!
Lynn , it is too early to be sure yet, but your idea for the pressure
bottle looks like it is going to help the cooling a lot. It may not be
the complete solution, but it seems to be a step in the right direction.
Thanks!
Bill B