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Joe,
Your oil pressure regime appears to be nearly identical to
mine so I see no problems there.
You may not get that low a manifold pressure with the
rotary I normally see between 12-14"Hg.
EGTs are higher than mine (max 1650-1700F), but mine are
installed approx 8" from the port. Regarding the hot headers at 1600 rpm,
you may want to check your ignition timing and make certain you don't have a lot
of ignition retarded timing. See Tracy's instruction manual. I
presume you have set the static timing to his recommended 35Deg
BTDC.
My headers are make of schedule 40 SS pipe and they are
approx 0.10" thick and I have never seen them glow, but assume at higher power
settings that they do based on the effect of their radiant heat on some plastic
wiring protectors melting.
Looks like things are going well for your first
runs.
Ed A
----- Original Message -----
Sent: Thursday, November 03, 2005 1:47
AM
Subject: [FlyRotary] Another Run - with
Questions
I ran the engine for an hour
straight tonight. It seemed to run well but I do have a couple of questions
that maybe this esteemed group can comment on.
- Engine starts out
at about 1300RPM at idle when cold and Oil PSI briefly is 81PSI and then
drops to 65 or so after 15-20 seconds. Then as things warm up the RPM’s increase and oil pressure drops. RPM levels out at about 1550 and oil
pressure hovers around 30PSI.
Is 30PSI an OK oil pressure level at that RPM? I did increase the RPM briefly
toward the end of the hour and oil pressure did go up. At 1900-2000 RPM oil
pressure was around 50PSI.
- At the 1550 RPM the
MicroTech says manifold pressure is 9-10Hg
(18-20PSI). Does that sound
reasonable?
- EGT’s are
2000-2050F. Seems a tad high to
me!! My EGT probes are located
about 2.5” from the rotor housing.
When I shut it down my exhaust manifold/muffler was a very nice
glowing red. It’s made out of
Inconel and is .06 thick so it seems to hold up
pretty well. But if it’s like
this at 1600RPM what’s it going to be at 5800RPM??
Cooling seems to be OK at the
moment. When ever it gets to 212F
I’ve got the MicroTech setup to turn on my radiator
fan and it immediately heads down and goes to 180F in 1-2 minutes. Oil temps never got above 150F. But we are in Washington and the air
temp was between 45F and 50F so I’m sure that
helped.
Thanx
(rethinking fuel return and heater hoses)
Joe
Hull
Redmond
(Seattle), Washington
Cozy MkIV #991
(working on Engine & Electrical & Finishing)
http://www.maddyhome.com/canardpages/pages/JoeHull/index.html
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