Good theory, but I don't think I can subscribe as I fouled one cylinder
on the way to the gathering a few weeks ago and yes I knew that something
was not right from roughness, as far as a major power loss that just did
not happen. I don't believe I lost more that a few hundred rpm and
certainly could have sustained flight if I would not have been landing at
the time anyway. One push of the button on the EIS confirmed that the #2
cylinder was completely cold. Exhaust temp was about 400 and head temp
was rapidly dropping well below 200. I was not worried in that it was
producing plenty of power even for a go around if needed but I didn't
like it either. In my case i had reduced throttle and caused a rich
condition that actually seemed to flood the # 2 cylinder that I caused by
miss using the mixture in the much colder weather conditions after
summer. I was able to reproduce this condition in cruise and quickly
learned how to manage it. After getting back home I readjusted the Aero
carb for winter mixture and the problem is gone.
No help for Mark here just an example how many different things
could happen.
Joe Horton, Coopersburg, PA.
[email protected]
On Mon, 23 Oct 2006 15:08:55 -0400 "Colin Rainey"
<[email protected]> writes:
> Mark and netters
> Losing the #5 intake valve would cause the air fuel mix that entered
> the
> cylinder to be expelled back into the intake head area, causing the
> next
> intake of either #1 or #3 to be very complete as it would
> temporarily act
> similar to a form of boost, making pressure in the intake. At lower
> rpms it
> might possible cause the next cylinder to have a lower charge due to
> the
> reversion of the flow, but the third in the series would be
> unaffected. At
> higher rpms, this would be negligeable. Since #5 was making no
> compression,
> the engine would have to lug the mass of piston around as well as
> making
> power to run, so it would affect power by more the 1/5, more like 30
> to 40%.
> You would also feel a very pronounced missing due to the dramatic
> difference
> between a cylinder that makes decent power and then the dead one.
>
> My opinion about the progression of your problem is that you began
> to run
> rich due to the carb issues, the associated carbon buildups resulted
> in hot
> spots in the cylinders, which lead to pre-ignition and detonation,
> which
> damaged the head area immediately around the intake valve. The
> carbon
> buildup would act like little matches lighting off the fuel early,
> especially when you ran the auto pump gas.
>
> JMHO...
>
> Colin Rainey
> Independent Loan Officer
> Branch 2375
> Apex Mortgage Company
> 386.615.3388 Home Office
> 407.739.0834 Cell
> 407.557.3260 Fax
> [email protected]
>
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Joe Horton, Coopersburg, PA.
[email protected]
