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