----- Original Message -----
Sent: Friday, August 20, 2004 7:14
PM
Subject: [FlyRotary] Re: EM-2 MAP
readings
Thanks for the
comments Mike. I agree, and think it would be difficult for the TB ports
to read accurately at high velocity. That being
said...
I just hung up with
TWM, and they believe those ports are completely accurate in their TB.
He asked what size TB I had, what engine, and about what HP I thought it
was capable of. After hearing all that, he said my 42 mm bores were
simply too small, and that I'd need at least 45's. When I pointed
out that my runners were only about 42 mm, he basically said "start over"
:-) He did mention the possibility of adding a crossover tube
between the two runners, to allow one to steal from the other, but I probably
wouldn't do that unless I was committed to building another intake if it
didn't work.
BTW, he guessed right
off the bat that it was on an airplane, and he mentioned that he really wished
we wouldn't put their TB's on airplanes, because it made him
nervous. I assured him that I wouldn't sue him, and that his TB was
higher quality than anything I could cobble together, so he
was actually increasing my chances of survival
:-)
At the moment, I've decided that I just
don't know what's going on yet :-) My only benchmark is Tracy's 6200 RPM
at 120-130 mph in climb, so I'll see how I compare to that this weekend
(weather permitting). I'm also convinced that the engine is producing
more power than before, due to the rapid rise in temps now, so I'll also take
a look at climb rate, and top speed at whatever altitude I can get to with the
clouds. Heck, maybe I'm worrying about nothing.
Maybe Ed will hurry up and get his
conversion done so we can get some more data. He's probably lapping his
input shaft now (which sounds a little nastier than intended) :-)
Cheers,
Rusty (maybe an ankle weight on my
right leg)
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