----- Original Message -----
Sent: Friday, March 25, 2005 11:57
AM
Subject: [FlyRotary] a better running
rotary
I went out to the airport today and ran the
engine up, did a quick full power runup and then went to the runway and took
off and landed (back on the same runway). Never ran better...matter of
fact never ran this well. What, might we ask made the dramatic
improvement? I call it reverse stupidity. A couple of days ago,
I went to a page on my MicroTech ECU handheld programmer that I had not
previously viewed. It showed rpm and water temp. My engine monitor showed a
water temp of 160 degrees F. The ECU monitor showed a water temp
of -24 degrees C. Not even close. To make a long story short, I had wired
two monitors to one water temp sending unit. After running the engine, the
ECU water temp climbed from -24C all the way up to -12C. I
disconnected the wire that went to the engine monitor, and the ECU water
temp immediately went up to 60C. Since the ECU varies fuel and timing
based on water temperatures, it was unable to do it's job correctly
with inaccurate water temp inputs. The cold start enrichment also was
not functioning, as the engine map's were supposed to start reducing mixture
levels after reaching 50 degrees C. It never saw those numbers, so it
could not function properly. Now, with the proper water temp inputs,
it runs GREAT !!! Cold start, warm up, idle through WOT is smooth as
silk. To think of all the time I wasted trying to program injector
open times, etc on an ECU that was receiving improper water temp
information.
I should have known
better than to connect two monitors to one sending unit, but I did it
anyway. Just hoping others can learn from my mistake instead of making their
own.
Just when I had
a custom made mounting plate made for the HA-6 carburetor I just purchased,
the thing has to go and run like a swiss watch. Murphy wins
again. Take care. Paul Conner