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Message
John, I presume this is all with the turbocharger
hooked up? Getting 30/31 inches Hg at 2300 rpm indicates that the engine
is not sucking from the intake manifold as hard as it should be. If the
problem were an obstruction in the intake then I would expect the manifold
pressure to be lower due to the restriction hindering air from flowing into the
intake manifold. But, it sounds like your throttle is wide open.
Soooooo.....
This leads me to wonder whether or not there could
be a problem with the exhaust side of the engine. If it were plugged or
restricted due to a collapsed muffler, turbo charger turbine not turning
then that could prevent it from going to higher rpm. If the case, then you
would have a high intake manifold pressure (since the throttle is wide open and
the engine is not sucking from the manifold as it should) and low power due to
the restriction in the exhaust.
I can remember when collapsed mufflers and cat
converters (when they first came out) could become plugged and give this type of
results on reciprocating engines
So in lue of anything else I would check out
the exhaust side of the equation also.
Ed Anderson
----- Original Message -----
Sent: Monday, October 04, 2004 10:29
PM
Subject: [FlyRotary] Re: Low power 20B
operation
> I could be wrong, but I sort of doubt
its an apex seal, John.
Please don't be wrong, Ed.
> I presume the throttle body is opened
fully when you are at 2300 rpm - no slipping throttle cables?
> No
pinched fuel hoses? No collapsed air filters/hoses?
I don't think so, but thanks for the list of things
to check. My list was empty.
One symptom that caught my attention is the MAP
reading. At full throttle it bounces around 30/31. It goes down normally
on throttle reduction. It was always very steady (and went up and down
with throttle). Helpful clue???
> Is it running incredibly
rough?
Not
incredibly rough, no. Just VERY
sluggish.
John (what me?
frustrated?)
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