Brian,
Thanks much for taking the time to provide me with the answer that you
have. I am using a system that conects to one sensor to the cylinder that
is supposed to be the one that runs the hotest of the four.
Bob Stone
----- Original Message -----
From: "Brian Kraut" <brian.kr...@engalt.com>
To: "KRnet" <kr...@mylist.net>
Sent: Friday, November 25, 2005 6:10 PM
Subject: RE: KR> Engine heat
>I have seen published EGT never to exceed temps before, but only on factory
> planes that have the probe in the same place. What your maximum is will
> depend on where the probe is and a little bit on how the air flow is over
> the exhaust.
>
> When you are leaning the engine you are looking for what the peak EGT is
> as
> you pull the mixture back. The actual number is not really that
> important.
>
> When you are at your cruise power setting you want to slowly pull the
> mixture back a little at a time. Let the EGT settle for 5 to 10 seconds
> each time you pull back a little. You will eventually reach a point where
> you get a peak temperature and pulling back the mixture any more will
> cause
> the temp to decrease. Once you have found the peak you want to push the
> mixture in where it is 25 - 50 degrees rich of peak for a good economy
> cruise. Your best power setting will be about 100 degrees rich of peak.
> You will find that your peak temp wil vary some depending on your power
> setting, altitude, and outside air temp, but you can still find the peak
> at
> any setting.
>
> I have found that with exhaust wrap that it is much easier to find the
> peak
> on my Midget Mustang than it was without it.
>
> You will get some differences of opinion on weather you should run rich of
> peak, lean of peak, or at peak. If you have a good matched set of fuel
> injectors like the Gami ones you can safely run best a little lean of
> peak.
> When you are using a carburated engine or regular injectors that are not
> matched and you only have one EGT you need to err on the rich side because
> you might have one or more other cylinders that are leaner than the one
> you
> have the EGT on and you can damage them.
>
> Brian Kraut
> Engineering Alternatives, Inc.
> www.engalt.com
>
> -----Original Message-----
> From: krnet-boun...@mylist.net [mailto:krnet-boun...@mylist.net]On
> Behalf Of Robert L. Stone
> Sent: Friday, November 25, 2005 1:14 PM
> To: KR Builders Pilots
> Subject: KR> Engine heat
>
>
> Netters,
> I hope one of you is knowledgeable enough to provide me with
> information I need to use my EGT gauge. I need facts rather than
> opinions.
> I am running a 110 horse Lycoming
> engine and just had an EGT gauge installed. The gauge is set to alarm at
> 1500 degrees and this seems high to me. Can anyone tell me when climing
> to
> altitude and thining the mixture what would be the best temperature for
> maximum fuel economy and engine health. I would also like to know what
> the
> never exceed temperature would be.
>
> Bob Stone
>
>
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>
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