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Greg, with my 13B my two EGT probes are 8" from
the exhaust port. High temps read 1650F, so could be a few degrees
cooler than if closer, have replaced them once with 10 years of usage.
I have one O2 sensor in my number 1 rotor's
header. Its located 12 " from Exhaust port - have replaced it once
and I use 100 LL most of the time. The Leaded gasoline does not
appear to diminish is functioning as an Air/Fuel ratio indicator although all
indications is that even a small amount of lead ruins the O2 sensor for its use
as an controller element in the automobile ECU.
Ed
----- Original Message -----
Sent: Wednesday, June 11, 2008 2:37
AM
Subject: [FlyRotary] Re: Sensors
As long as we're at it about sensors, how about
EGT? I am turboed on the 20B, and have a 3 into one collector going to
the Garrett turbo. Do I want to have individual EGT's on each pipe, or
one on the exhaust side of the turbo, or all 4? My collector pipes are
only about 8-10" before they hit the flange, so here too, I wonder where the
best place is to place the sensors. Thanks for all the input on
the MAP, going to locate it close behind the valve body.
Greg Ward
Lancair 20B, details, details,
details
----- Original Message -----
Sent: Tuesday, June 10, 2008 8:32
PM
Subject: [FlyRotary] Re: Sensors
I have two MAP ports on the rear of my intake plenum
that feed the EC-2. I am taking the pressure from this third port at
the bottom of the manifold to the regulator. I have a vacuum gage…I
guess I should check the steadiness and consistency of all three
ports.
Bill
From:
Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On
Behalf Of Al Gietzen
Sent: Tuesday, June 10, 2008 9:26
PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re:
Sensors
Perhaps I should
add that the original line from the sensing ports to the pressure regulator
was quite short; maybe 10”; so there was very little damping
there.
My fuel pressure regulator (Airmotive)
is getting its MAP from the two small (1/8 “) tubes that lay in the primary
ports on the Renesis…Are you saying that I should move this pressure
reference to someplace else? You say you know it is not good…How do
you know this?
Bill
B
Bill;
I
was measuring fuel pressure to the fuel rails to verify the EM2
calibration. The needle on the gauge was swinging very rapidly from
about 20 to 40. I don’t recall what RPM, but I guess near idle.
Perhaps stating that “it is not good” is an overstatement, and perhaps it
just happened that the pressure pulses hit a resonance in the gauge; but my
judgment was that it could affect the engine operation and could be damaging
to something else long term. I had already put damping in MAP line to
the EC2, so I decided to T it into that line, and the pressure pulsing went
away.
I
have a 3-barrel TWM TB on a short intake manifold. The MAP sensing
ports are just downstream of the throttle
plates.
Al
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