Today's Message Index:
----------------------
1. 01:34 PM - Do You Need All 6 EGT's?? (DaveG601XL)
2. 02:05 PM - Re: Do You Need All 6 EGT's?? (Wayne Lenox)
3. 02:21 PM - Re: Do You Need All 6 EGT's?? (JOSEPH MATHIAS LINDA MATHIAS)
4. 03:31 PM - Re: Do You Need All 6 EGT's?? (Peter Harris)
5. 03:35 PM - Re: Do You Need All 6 EGT's?? (Jabiru USA)
6. 03:41 PM - Re: Do You Need All 6 EGT's?? (Peter Harris)
7. 04:38 PM - Re: Do You Need All 6 EGT's?? (Ivan Brauer)
8. 05:09 PM - Re: Do You Need All 6 EGT's?? (Kayberg@aol.com)
9. 06:48 PM - Re: Do You Need All 6 EGT's?? (JOSEPH MATHIAS LINDA MATHIAS)
10. 08:53 PM - Re: Do You Need All 6 EGT's?? (Peter Harris)
Message 1
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| Subject: | Do You Need All 6 EGT's?? |
I am still working on my Jabiru 3300/Zenith 601XL FWF and have this to throw out
to you all for opinions?
Do you really need to drill all six exhaust pipes and read six EGT's if using
the Bing carb??
I understand that you cannot tune individual cylinders with this carb set-up.
You can only change jet sizes to modify overall mixture or tilt the carb to favor
one side or another. This said, Pete's recommendation from Jabiru USA is
to still go ahead and drill all six.
I do not mind the work of drilling the extra four holes. My concern is of creating
four more potential sources of undercowl heat and carbon monoxide from possible
leaks. Maybe this is a non-issue, I don't know. Also I know that more
thermocouples increases the chances of a bad sensor making you think there is
a problem where none exists.
Can anybody with real world experience of reading all six cylinders chime in with:
1. Have you found any evidence where these probes leaked and caused issues.
2. Did reading all six EGT's tell you something that you would not have found out
by reading only two.
Pete, these are the follow-up questions that I did not think to ask when I first
asked you about this at the FWF seminar last fall.
Thanks,
--------
David Gallagher
601 XL, tail and wings completed,
fueslage almost done. Working engine and electrical systems.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=159830#159830
Message 2
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| Subject: | Re: Do You Need All 6 EGT's?? |
Dave
Yes you need all six EGT'S. If you have one bad plug, it is easy to fin
d with mag check. One cylinder will go cold. You cannot tune individua
l cylinders with this carb set-up, but sure can tell if one is leaner th
en the others and need attention.
I have run six cylinder EGT'S on my C-182 for years and would not do wit
h out them. I have found they seal up very well, no leaks. I do check
that the clamps on the EGT censers are tight at each oil change. You ne
ed all six!!
Wayne
-- "DaveG601XL" <david.m.gallagher@ge.com> wrote:
@ge.com>
I am still working on my Jabiru 3300/Zenith 601XL FWF and have this to t
hrow out to you all for opinions?
Do you really need to drill all six exhaust pipes and read six EGT's if
using the Bing carb??
I understand that you cannot tune individual cylinders with this carb se
t-up. You can only change jet sizes to modify overall mixture or tilt t
he carb to favor one side or another. This said, Pete's recommendation
from Jabiru USA is to still go ahead and drill all six.
I do not mind the work of drilling the extra four holes. My concern is
of creating four more potential sources of undercowl heat and carbon mon
oxide from possible leaks. Maybe this is a non-issue, I don't know. Al
so I know that more thermocouples increases the chances of a bad sensor
making you think there is a problem where none exists.
Can anybody with real world experience of reading all six cylinders chim
e in with:
1. Have you found any evidence where these probes leaked and caused issu
es.
2. Did reading all six EGT's tell you something that you would not have
found out by reading only two.
Pete, these are the follow-up questions that I did not think to ask when
I first asked you about this at the FWF seminar last fall.
Thanks,
--------
David Gallagher
601 XL, tail and wings completed,
fueslage almost done. Working engine and electrical systems.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=159830#159830
========================
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_____________________________________________________________
Need cash? Click to get a loan.
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p5VBDXmoJ7yX6LUtHtdqWw0JRo/
Message 3
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| Subject: | Re: Do You Need All 6 EGT's?? |
Dave,
I have all 6 EGT's and CHT's on my 3300 in a Lightning; the
comparisons for all 6 have been invaluable in troubleshooting and resolving
some CHT overheating problems through the past summer. I am still having
some fairly large discrepancies between the EGT's on the left and right
sides of the engine during climbout; still working to resolve those. Both
rejetting and twisting the carb helped a little but I was unable to twist it
far enough to resolve the problem because the second twist caused a blockage
of the throttle linkage. I may have to rejet again but having the #s for
all cylinders helps JabiruUSA/Arion know how to advise me.
Linda Mathias
----- Original Message -----
From: "DaveG601XL" <david.m.gallagher@ge.com>
To: <jabiruengine-list@matronics.com>
Sent: Tuesday, January 22, 2008 4:32 PM
Subject: JabiruEngine-List: Do You Need All 6 EGT's??
<david.m.gallagher@ge.com>
>
> I am still working on my Jabiru 3300/Zenith 601XL FWF and have this to
throw out to you all for opinions?
>
> Do you really need to drill all six exhaust pipes and read six EGT's if
using the Bing carb??
>
> I understand that you cannot tune individual cylinders with this carb
set-up. You can only change jet sizes to modify overall mixture or tilt the
carb to favor one side or another. This said, Pete's recommendation from
Jabiru USA is to still go ahead and drill all six.
>
> I do not mind the work of drilling the extra four holes. My concern is
of creating four more potential sources of undercowl heat and carbon
monoxide from possible leaks. Maybe this is a non-issue, I don't know.
Also I know that more thermocouples increases the chances of a bad sensor
making you think there is a problem where none exists.
>
> Can anybody with real world experience of reading all six cylinders
chime in with:
>
> 1. Have you found any evidence where these probes leaked and caused
issues.
> 2. Did reading all six EGT's tell you something that you would not have
found out by reading only two.
>
> Pete, these are the follow-up questions that I did not think to ask when
I first asked you about this at the FWF seminar last fall.
>
> Thanks,
>
> --------
> David Gallagher
> 601 XL, tail and wings completed,
> fueslage almost done. Working engine and electrical systems.
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=159830#159830
>
>
>
>
>
>
>
>
>
>
--------------------------------------------------------------------------------
Message 4
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| Subject: | Do You Need All 6 EGT's?? |
Dave
Good questions I think Dave. I went through the same logic, but also each of
my probes cost AUD60 and the leads are AUD50. I worked with two probes and
the Bing and confirmed that #5 (RHS) was a good deal hotter than #6 (LHS)
which can be cured by tilting the carb. I also found the mixture excessively
rich above 2800rpm and this tends to lessen the heat differential at the
expense of power. The needle valve seat leaks from about 2800RPM up.
I have since fitted EFI using a single throttle body with two injectors,
which mounts into the Bing spigot hose.
The additional airflow has made the problem worse and the difference in T
becomes very high above 2800RPM. I can cure the T differential problem only
by running excessively rich at the cost of power.
I believe the cause of the problem is due to the fact that the intake
headers are fed from a collector of less than 1/2L capacity. The carb feeds
the collector. A very neat and economical manufacturing design at the
expense of uniform distribution of the fuel air mix.
Good design (for EFI) demands a manifold of at least 3L capacity and I am
starting a project to make it happen for my installation.
Peter H
-----Original Message-----
From: owner-jabiruengine-list-server@matronics.com
[mailto:owner-jabiruengine-list-server@matronics.com] On Behalf Of
DaveG601XL
Sent: Wednesday, 23 January 2008 7:32 AM
Subject: JabiruEngine-List: Do You Need All 6 EGT's??
<david.m.gallagher@ge.com>
I am still working on my Jabiru 3300/Zenith 601XL FWF and have this to throw
out to you all for opinions?
Do you really need to drill all six exhaust pipes and read six EGT's if
using the Bing carb??
I understand that you cannot tune individual cylinders with this carb
set-up. You can only change jet sizes to modify overall mixture or tilt the
carb to favor one side or another. This said, Pete's recommendation from
Jabiru USA is to still go ahead and drill all six.
I do not mind the work of drilling the extra four holes. My concern is of
creating four more potential sources of undercowl heat and carbon monoxide
from possible leaks. Maybe this is a non-issue, I don't know. Also I know
that more thermocouples increases the chances of a bad sensor making you
think there is a problem where none exists.
Can anybody with real world experience of reading all six cylinders chime in
with:
1. Have you found any evidence where these probes leaked and caused issues.
2. Did reading all six EGT's tell you something that you would not have
found out by reading only two.
Pete, these are the follow-up questions that I did not think to ask when I
first asked you about this at the FWF seminar last fall.
Thanks,
--------
David Gallagher
601 XL, tail and wings completed,
fueslage almost done. Working engine and electrical systems.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=159830#159830
Message 5
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| Subject: | Do You Need All 6 EGT's?? |
We don't find any issues with the probes leaking. Once in a while we see an
oddly lean cylinder which may indicate an intake leak.
Pete
-----Original Message-----
From: owner-jabiruengine-list-server@matronics.com
[mailto:owner-jabiruengine-list-server@matronics.com] On Behalf Of
DaveG601XL
Sent: Tuesday, January 22, 2008 3:32 PM
Subject: JabiruEngine-List: Do You Need All 6 EGT's??
<david.m.gallagher@ge.com>
I am still working on my Jabiru 3300/Zenith 601XL FWF and have this to throw
out to you all for opinions?
Do you really need to drill all six exhaust pipes and read six EGT's if
using the Bing carb??
I understand that you cannot tune individual cylinders with this carb
set-up. You can only change jet sizes to modify overall mixture or tilt the
carb to favor one side or another. This said, Pete's recommendation from
Jabiru USA is to still go ahead and drill all six.
I do not mind the work of drilling the extra four holes. My concern is of
creating four more potential sources of undercowl heat and carbon monoxide
from possible leaks. Maybe this is a non-issue, I don't know. Also I know
that more thermocouples increases the chances of a bad sensor making you
think there is a problem where none exists.
Can anybody with real world experience of reading all six cylinders chime in
with:
1. Have you found any evidence where these probes leaked and caused issues.
2. Did reading all six EGT's tell you something that you would not have
found out by reading only two.
Pete, these are the follow-up questions that I did not think to ask when I
first asked you about this at the FWF seminar last fall.
Thanks,
--------
David Gallagher
601 XL, tail and wings completed,
fueslage almost done. Working engine and electrical systems.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=159830#159830
Message 6
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| Subject: | Do You Need All 6 EGT's?? |
Linda,
Can you advise please, what is a typical pattern of EGT ie are the RHS
hotter but even or do they also vary , and by how much. Are the LHS even and
cooler?
Thanks
Peter H
-----Original Message-----
From: owner-jabiruengine-list-server@matronics.com
[mailto:owner-jabiruengine-list-server@matronics.com] On Behalf Of JOSEPH
MATHIAS LINDA MATHIAS
Sent: Wednesday, 23 January 2008 8:19 AM
Subject: Re: JabiruEngine-List: Do You Need All 6 EGT's??
<lbmathias@verizon.net>
Dave,
I have all 6 EGT's and CHT's on my 3300 in a Lightning; the
comparisons for all 6 have been invaluable in troubleshooting and resolving
some CHT overheating problems through the past summer. I am still having
some fairly large discrepancies between the EGT's on the left and right
sides of the engine during climbout; still working to resolve those. Both
rejetting and twisting the carb helped a little but I was unable to twist it
far enough to resolve the problem because the second twist caused a blockage
of the throttle linkage. I may have to rejet again but having the #s for
all cylinders helps JabiruUSA/Arion know how to advise me.
Linda Mathias
----- Original Message -----
From: "DaveG601XL" <david.m.gallagher@ge.com>
To: <jabiruengine-list@matronics.com>
Sent: Tuesday, January 22, 2008 4:32 PM
Subject: JabiruEngine-List: Do You Need All 6 EGT's??
<david.m.gallagher@ge.com>
>
> I am still working on my Jabiru 3300/Zenith 601XL FWF and have this to
throw out to you all for opinions?
>
> Do you really need to drill all six exhaust pipes and read six EGT's if
using the Bing carb??
>
> I understand that you cannot tune individual cylinders with this carb
set-up. You can only change jet sizes to modify overall mixture or tilt the
carb to favor one side or another. This said, Pete's recommendation from
Jabiru USA is to still go ahead and drill all six.
>
> I do not mind the work of drilling the extra four holes. My concern is
of creating four more potential sources of undercowl heat and carbon
monoxide from possible leaks. Maybe this is a non-issue, I don't know.
Also I know that more thermocouples increases the chances of a bad sensor
making you think there is a problem where none exists.
>
> Can anybody with real world experience of reading all six cylinders
chime in with:
>
> 1. Have you found any evidence where these probes leaked and caused
issues.
> 2. Did reading all six EGT's tell you something that you would not have
found out by reading only two.
>
> Pete, these are the follow-up questions that I did not think to ask when
I first asked you about this at the FWF seminar last fall.
>
> Thanks,
>
> --------
> David Gallagher
> 601 XL, tail and wings completed,
> fueslage almost done. Working engine and electrical systems.
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=159830#159830
>
>
>
>
>
>
>
>
>
>
----------------------------------------------------------------------------
----
Message 7
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| Subject: | Re: Do You Need All 6 EGT's?? |
Please update my profile to change my email address. I tried to do it
online but I forgot my name and/or password. My new email address is
IMAP8NTR@COX.NET
Thanks
Ivan
----- Original Message -----
From: "Peter Harris" <peterjfharris@bigpond.com>
Sent: Tuesday, January 22, 2008 4:39 PM
Subject: RE: JabiruEngine-List: Do You Need All 6 EGT's??
> <peterjfharris@bigpond.com>
>
> Linda,
> Can you advise please, what is a typical pattern of EGT ie are the RHS
> hotter but even or do they also vary , and by how much. Are the LHS even
> and
> cooler?
> Thanks
> Peter H
>
> -----Original Message-----
> From: owner-jabiruengine-list-server@matronics.com
> [mailto:owner-jabiruengine-list-server@matronics.com] On Behalf Of JOSEPH
> MATHIAS LINDA MATHIAS
> Sent: Wednesday, 23 January 2008 8:19 AM
> To: jabiruengine-list@matronics.com
> Subject: Re: JabiruEngine-List: Do You Need All 6 EGT's??
>
> <lbmathias@verizon.net>
>
> Dave,
>
> I have all 6 EGT's and CHT's on my 3300 in a Lightning; the
> comparisons for all 6 have been invaluable in troubleshooting and
> resolving
> some CHT overheating problems through the past summer. I am still having
> some fairly large discrepancies between the EGT's on the left and right
> sides of the engine during climbout; still working to resolve those.
> Both
> rejetting and twisting the carb helped a little but I was unable to twist
> it
>
> far enough to resolve the problem because the second twist caused a
> blockage
>
> of the throttle linkage. I may have to rejet again but having the #s for
> all cylinders helps JabiruUSA/Arion know how to advise me.
>
> Linda Mathias
>
> ----- Original Message -----
> From: "DaveG601XL" <david.m.gallagher@ge.com>
> To: <jabiruengine-list@matronics.com>
> Sent: Tuesday, January 22, 2008 4:32 PM
> Subject: JabiruEngine-List: Do You Need All 6 EGT's??
>
>
> <david.m.gallagher@ge.com>
> >
> > I am still working on my Jabiru 3300/Zenith 601XL FWF and have this to
> throw out to you all for opinions?
> >
> > Do you really need to drill all six exhaust pipes and read six EGT's if
> using the Bing carb??
> >
> > I understand that you cannot tune individual cylinders with this carb
> set-up. You can only change jet sizes to modify overall mixture or tilt
> the
>
> carb to favor one side or another. This said, Pete's recommendation from
> Jabiru USA is to still go ahead and drill all six.
> >
> > I do not mind the work of drilling the extra four holes. My concern is
> of creating four more potential sources of undercowl heat and carbon
> monoxide from possible leaks. Maybe this is a non-issue, I don't know.
> Also I know that more thermocouples increases the chances of a bad sensor
> making you think there is a problem where none exists.
> >
> > Can anybody with real world experience of reading all six cylinders
> chime in with:
> >
> > 1. Have you found any evidence where these probes leaked and caused
> issues.
> > 2. Did reading all six EGT's tell you something that you would not have
> found out by reading only two.
> >
> > Pete, these are the follow-up questions that I did not think to ask
> when
>
> I first asked you about this at the FWF seminar last fall.
> >
> > Thanks,
> >
> > --------
> > David Gallagher
> > 601 XL, tail and wings completed,
> > fueslage almost done. Working engine and electrical systems.
> >
> >
> >
> >
> > Read this topic online here:
> >
> > http://forums.matronics.com/viewtopic.php?p=159830#159830
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
>
>
> ----------------------------------------------------------------------------
> ----
>
>
>
Message 8
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| Subject: | Re: Do You Need All 6 EGT's?? |
In a message dated 1/22/2008 4:35:38 P.M. Eastern Standard Time,
david.m.gallagher@ge.com writes:
Do you really need to drill all six exhaust pipes and read six EGT's if
using the Bing carb??
No you dont.
but it also depends on what you are using to monitor them. If you are
looking at 6 numbers, I find that distracting. If you have a graphic
representation, that is better.
If you notice one exhaust is higher than the others, can you do anything
about it? Not really. But it will give you something to worry about on long
cross countries. You can try flying along sideways to see if you can even the
flow through the carb!!!
CHTs are a different matter. You need all 6.
Just my opinion.
Doug Koenigsberg
**************Start the year off right. Easy ways to stay in shape.
http://body.aol.com/fitness/winter-exercise?NCID=aolcmp00300000002489
Message 9
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| Subject: | Re: Do You Need All 6 EGT's?? |
Peter,
The biggest discrepancy occurs during climbout at full power; #3 and
#5 cylinder are generally in the high 1300's or even sometimes in the 1400's
while #4 and #6 are registering about 1130-1150. Nos. 1 and 2 are usually
in the low 1300's.
Linda
----- Original Message -----
From: "Peter Harris" <peterjfharris@bigpond.com>
To: <jabiruengine-list@matronics.com>
Sent: Tuesday, January 22, 2008 6:39 PM
Subject: RE: JabiruEngine-List: Do You Need All 6 EGT's??
<peterjfharris@bigpond.com>
>
> Linda,
> Can you advise please, what is a typical pattern of EGT ie are the RHS
> hotter but even or do they also vary , and by how much. Are the LHS even
and
> cooler?
> Thanks
> Peter H
>
> -----Original Message-----
> From: owner-jabiruengine-list-server@matronics.com
> [mailto:owner-jabiruengine-list-server@matronics.com] On Behalf Of
JOSEPH
> MATHIAS LINDA MATHIAS
> Sent: Wednesday, 23 January 2008 8:19 AM
> To: jabiruengine-list@matronics.com
> Subject: Re: JabiruEngine-List: Do You Need All 6 EGT's??
>
> <lbmathias@verizon.net>
>
> Dave,
>
> I have all 6 EGT's and CHT's on my 3300 in a Lightning; the
> comparisons for all 6 have been invaluable in troubleshooting and
resolving
> some CHT overheating problems through the past summer. I am still
having
> some fairly large discrepancies between the EGT's on the left and right
> sides of the engine during climbout; still working to resolve those.
Both
> rejetting and twisting the carb helped a little but I was unable to
twist it
>
> far enough to resolve the problem because the second twist caused a
blockage
>
> of the throttle linkage. I may have to rejet again but having the #s
for
> all cylinders helps JabiruUSA/Arion know how to advise me.
>
> Linda Mathias
>
> ----- Original Message -----
> From: "DaveG601XL" <david.m.gallagher@ge.com>
> To: <jabiruengine-list@matronics.com>
> Sent: Tuesday, January 22, 2008 4:32 PM
> Subject: JabiruEngine-List: Do You Need All 6 EGT's??
>
>
> <david.m.gallagher@ge.com>
> >
> > I am still working on my Jabiru 3300/Zenith 601XL FWF and have this
to
> throw out to you all for opinions?
> >
> > Do you really need to drill all six exhaust pipes and read six EGT's
if
> using the Bing carb??
> >
> > I understand that you cannot tune individual cylinders with this carb
> set-up. You can only change jet sizes to modify overall mixture or tilt
the
>
> carb to favor one side or another. This said, Pete's recommendation
from
> Jabiru USA is to still go ahead and drill all six.
> >
> > I do not mind the work of drilling the extra four holes. My concern
is
> of creating four more potential sources of undercowl heat and carbon
> monoxide from possible leaks. Maybe this is a non-issue, I don't know.
> Also I know that more thermocouples increases the chances of a bad
sensor
> making you think there is a problem where none exists.
> >
> > Can anybody with real world experience of reading all six cylinders
> chime in with:
> >
> > 1. Have you found any evidence where these probes leaked and caused
> issues.
> > 2. Did reading all six EGT's tell you something that you would not
have
> found out by reading only two.
> >
> > Pete, these are the follow-up questions that I did not think to ask
when
>
> I first asked you about this at the FWF seminar last fall.
> >
> > Thanks,
> >
> > --------
> > David Gallagher
> > 601 XL, tail and wings completed,
> > fueslage almost done. Working engine and electrical systems.
> >
> >
> >
> >
> > Read this topic online here:
> >
> > http://forums.matronics.com/viewtopic.php?p=159830#159830
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
>
>
> ----------------------------------------------------------------------------
> ----
>
>
>
>
>
>
>
>
>
>
>
>
--------------------------------------------------------------------------------
Message 10
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| Subject: | Do You Need All 6 EGT's?? |
Linda,Thanks
I have seen similar EGT variance and up to 145degC difference above 2800rpm.
I get different results depending on RPM and I believe it is due to
turbulence in the collector I referred earlier.
Peter
-----Original Message-----
From: owner-jabiruengine-list-server@matronics.com
[mailto:owner-jabiruengine-list-server@matronics.com] On Behalf Of JOSEPH
MATHIAS LINDA MATHIAS
Sent: Wednesday, 23 January 2008 12:46 PM
Subject: Re: JabiruEngine-List: Do You Need All 6 EGT's??
<lbmathias@verizon.net>
Peter,
The biggest discrepancy occurs during climbout at full power; #3 and
#5 cylinder are generally in the high 1300's or even sometimes in the 1400's
while #4 and #6 are registering about 1130-1150. Nos. 1 and 2 are usually
in the low 1300's.
Linda
----- Original Message -----
From: "Peter Harris" <peterjfharris@bigpond.com>
To: <jabiruengine-list@matronics.com>
Sent: Tuesday, January 22, 2008 6:39 PM
Subject: RE: JabiruEngine-List: Do You Need All 6 EGT's??
<peterjfharris@bigpond.com>
>
> Linda,
> Can you advise please, what is a typical pattern of EGT ie are the RHS
> hotter but even or do they also vary , and by how much. Are the LHS even
and
> cooler?
> Thanks
> Peter H
>
> -----Original Message-----
> From: owner-jabiruengine-list-server@matronics.com
> [mailto:owner-jabiruengine-list-server@matronics.com] On Behalf Of
JOSEPH
> MATHIAS LINDA MATHIAS
> Sent: Wednesday, 23 January 2008 8:19 AM
> To: jabiruengine-list@matronics.com
> Subject: Re: JabiruEngine-List: Do You Need All 6 EGT's??
>
> <lbmathias@verizon.net>
>
> Dave,
>
> I have all 6 EGT's and CHT's on my 3300 in a Lightning; the
> comparisons for all 6 have been invaluable in troubleshooting and
resolving
> some CHT overheating problems through the past summer. I am still
having
> some fairly large discrepancies between the EGT's on the left and right
> sides of the engine during climbout; still working to resolve those.
Both
> rejetting and twisting the carb helped a little but I was unable to
twist it
>
> far enough to resolve the problem because the second twist caused a
blockage
>
> of the throttle linkage. I may have to rejet again but having the #s
for
> all cylinders helps JabiruUSA/Arion know how to advise me.
>
> Linda Mathias
>
> ----- Original Message -----
> From: "DaveG601XL" <david.m.gallagher@ge.com>
> To: <jabiruengine-list@matronics.com>
> Sent: Tuesday, January 22, 2008 4:32 PM
> Subject: JabiruEngine-List: Do You Need All 6 EGT's??
>
>
> <david.m.gallagher@ge.com>
> >
> > I am still working on my Jabiru 3300/Zenith 601XL FWF and have this
to
> throw out to you all for opinions?
> >
> > Do you really need to drill all six exhaust pipes and read six EGT's
if
> using the Bing carb??
> >
> > I understand that you cannot tune individual cylinders with this carb
> set-up. You can only change jet sizes to modify overall mixture or tilt
the
>
> carb to favor one side or another. This said, Pete's recommendation
from
> Jabiru USA is to still go ahead and drill all six.
> >
> > I do not mind the work of drilling the extra four holes. My concern
is
> of creating four more potential sources of undercowl heat and carbon
> monoxide from possible leaks. Maybe this is a non-issue, I don't know.
> Also I know that more thermocouples increases the chances of a bad
sensor
> making you think there is a problem where none exists.
> >
> > Can anybody with real world experience of reading all six cylinders
> chime in with:
> >
> > 1. Have you found any evidence where these probes leaked and caused
> issues.
> > 2. Did reading all six EGT's tell you something that you would not
have
> found out by reading only two.
> >
> > Pete, these are the follow-up questions that I did not think to ask
when
>
> I first asked you about this at the FWF seminar last fall.
> >
> > Thanks,
> >
> > --------
> > David Gallagher
> > 601 XL, tail and wings completed,
> > fueslage almost done. Working engine and electrical systems.
> >
> >
> >
> >
> > Read this topic online here:
> >
> > http://forums.matronics.com/viewtopic.php?p=159830#159830
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
>
>
>
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