Thanks Jeff for the input. I am beginning to think as you do about the meter
/ sender missmatch or a faulty meter. They were all purchased from A/C
Spruce at the same time but I am goung to check numbers. My probes are 6
inches from the ports. This is because the paperwork instructions that came
with the probes said 4 to 8 inches so I split the difference. I do have a
cockpit adjustible mixture control.
Again thanks for the input and food for thought. Your words about leaning
and temps are right on. When I get this sorted out I will let the group
know.
Stan
>From: [email protected]
>Reply-To: KRnet <[email protected]>
>To: [email protected]
>Subject: Re: KR> High EGTs
>Date: Wed, 4 Jan 2006 18:39:22 -0700
>
>
>On Wed, 4 Jan 2006 05:30:51 -0500 (Eastern Standard Time) "Dan Heath"
><[email protected]> writes:
> > Stanley,
> >
> > If you are truly running 1800 EGT, I think that you are burning your
> > engine
> > up. The reason for asking about the meter and mixture control was
> > to
> > determine if you have a way to adjust the mixture from the cockpit
> > and if
> > you have another way of verifying those extraordinary temperatures.
> > I think
> > that if your mixture is lean to the point that you get a true 1800,
> > that
> > your engine would not run. And if the air-fuel ratio meter is
> > telling you
> > that your mixture is correct, then the EGT gauge is faulty. You said
> > that
> > you have the standard intake system, so unless you have done
> > something
> > upstream of the air-fuel sender, your mixture is correct.
>
>Stanley,
>
>I suspect your high readings are either EGT probe placement or a
>gauge/meter mismatch. EGTs simply do not keep getting hotter as you lean
>out. What happens is that you reach a peak temperature as you lean, then
>the EGT temp starts dropping off. That's where the idea of running "Lean
>Of Peak" comes in. In that case you lean until you reach peak EGT. The
>actual EGT number is irrelevant. Then you continue to lean until your
>leanest cylinder is 50 degrees cooler than the peak EGT. I'm not
>necessarily advocating LOP operations, but am citing this as an example
>of hitting peak EGT, then continuing to lean. Most properly installed
>EGTs on a normally aspirated engine will show the peak EGT somewhere
>between 1300 and 1600 degrees depending on altitude.
>
>It seems that you listed your probe installation as 8" from the exhaust
>port in a previous post. I would suggest remounting them 4" from the
>exhaust port. You will also want to check for appropriate connections,
>correct wiring, etc.
>
>Jeff Scott
>
>_______________________________________
>Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp
>to UNsubscribe from KRnet, send a message to [email protected]
>please see other KRnet info at http://www.krnet.org/info.html
_________________________________________________________________
Express yourself instantly with MSN Messenger! Download today - it's FREE!
http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/
