Home » Public Forums » GMCnet » Ken Henderson's EGT measurement (Ken is going with dual needle setup)
| Ken Henderson's EGT measurement [message #251356] |
Mon, 02 June 2014 21:45  |
cbryan
Messages: 451
Registered: May 2012
Location: Ennis, Texas
Karma: 3
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Senior Member |
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Ken,
Is there any news on your EGT setup? To recap your adventure so far, you got one of those dual digital EGT setups and mounted the thermocouples (sending units) down the header pipes a few inches from the cast iron manifolds. You used two, one on each side. The experience was that it showed 1400 degrees F during mild cruise conditions. Due to your experience with the exhaust valve overheating in its guide and sticking, breaking the valve pedestal in your Cadillac 500, you were concerned with the indicated high temperature of the exhaust. Consensus at Montgomery was that possibly, the indication was inaccurate. I have heard that since then, you have acquired a dual needle meter and are planning on installing that in your instrument panel, but have had home based projects to complete first. Since you sometimes make progress and enquiring minds don't notice, I am hoping for an update. It is also a hope that someone else has made some progress on theirs, while our MH is succumbing to entropy.
Best,
Carey
Carey from Ennis, Texas
78 Royale, 500 Cadillac, Rance Baxter EFI.
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| Re: [GMCnet] Ken Henderson's EGT measurement [message #251413 is a reply to message #251356] |
Tue, 03 June 2014 16:52  |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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Carey,
You have the tale quite accurate. And I have only a little more to add.
Shortly after the trip to TX, I sent an email to Auber support and got
back a list of troubleshooting tips, most of no value. After a couple of
weeks, I finally got around to troubleshooting and proved that both
thermocouples were bad -- in different ways. The dual meter is still
mounted on the dash with short copper jumpers across the TC inputs, one of
the prescribed tests. It does, indeed read the ambient temperature quite
accurately and consistently between the two circuits, as predicted.
Auber promised to send me two more TC's, of a slightly different, more
robust, design. They're overdue and I'll be checking with them tomorrow to
find out why.
As for the dual needle EGT gauge from Sun'n'Fun, it's still here but
untouched. Until I get thermocouples that work, whether from Auber or
elsewhere, I'm not going to try it out.
I should mention that while Auber's products, in general, seem to be of
good quality, the conductor insulation on the two thermocouples was
horrible -- as bad as I've ever seen in my 65 years of electronics
tinkering. One was better than the other, but both were bad. That may be
the cause of Auber's delay -- I told them I'd send back any replacements
with comparably poor insulation.
When I finally do something, I'll let y'all know.
Ken H.
On Mon, Jun 2, 2014 at 10:45 PM, Carey Bryan wrote:
> Ken,
>
> Is there any news on your EGT setup? To recap your adventure so far, you
> got one of those dual digital EGT setups and mounted the thermocouples
> (sending units) down the header pipes a few inches from the cast iron
> manifolds. You used two, one on each side. The experience was that it
> showed
> 1400 degrees F during mild cruise conditions. Due to your experience with
> the exhaust valve overheating in its guide and sticking, breaking the valve
> pedestal in your Cadillac 500, you were concerned with the indicated high
> temperature of the exhaust. Consensus at Montgomery was that possibly,
> the
> indication was inaccurate. I have heard that since then, you have
> acquired a dual needle meter and are planning on installing that in your
> instrument
> panel, but have had home based projects to complete first. Since you
> sometimes make progress and enquiring minds don't notice, I am hoping for
> an
> update. It is also a hope that someone else has made some progress on
> theirs, while our MH is succumbing to entropy.
>
> Best,
>
> Carey
> --
> Carey from Ennis, Texas
> 78 Royale, 500 Cadillac, Rance Baxter EFI.
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] Ken Henderson's EGT measurement [message #251437 is a reply to message #251413] |
Tue, 03 June 2014 20:24 |
powerjon
Messages: 2446
Registered: January 2004
Karma: 5
|
Senior Member |
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|
Ken,
What was the color of the jacket material and the color of each conductor of the thermocouples. I can get you sourced with some industrial TC if I know what type they are.
JR Wright
78 Buskirk Stretch
75 Avion
Michigan
On Jun 3, 2014, at 5:52 PM, Ken Henderson wrote:
> Carey,
>
> You have the tale quite accurate. And I have only a little more to add.
> Shortly after the trip to TX, I sent an email to Auber support and got
> back a list of troubleshooting tips, most of no value. After a couple of
> weeks, I finally got around to troubleshooting and proved that both
> thermocouples were bad -- in different ways. The dual meter is still
> mounted on the dash with short copper jumpers across the TC inputs, one of
> the prescribed tests. It does, indeed read the ambient temperature quite
> accurately and consistently between the two circuits, as predicted.
>
> Auber promised to send me two more TC's, of a slightly different, more
> robust, design. They're overdue and I'll be checking with them tomorrow to
> find out why.
>
> As for the dual needle EGT gauge from Sun'n'Fun, it's still here but
> untouched. Until I get thermocouples that work, whether from Auber or
> elsewhere, I'm not going to try it out.
>
> I should mention that while Auber's products, in general, seem to be of
> good quality, the conductor insulation on the two thermocouples was
> horrible -- as bad as I've ever seen in my 65 years of electronics
> tinkering. One was better than the other, but both were bad. That may be
> the cause of Auber's delay -- I told them I'd send back any replacements
> with comparably poor insulation.
>
> When I finally do something, I'll let y'all know.
>
> Ken H.
>
>
> On Mon, Jun 2, 2014 at 10:45 PM, Carey Bryan wrote:
>
>> Ken,
>>
>> Is there any news on your EGT setup? To recap your adventure so far, you
>> got one of those dual digital EGT setups and mounted the thermocouples
>> (sending units) down the header pipes a few inches from the cast iron
>> manifolds. You used two, one on each side. The experience was that it
>> showed
>> 1400 degrees F during mild cruise conditions. Due to your experience with
>> the exhaust valve overheating in its guide and sticking, breaking the valve
>> pedestal in your Cadillac 500, you were concerned with the indicated high
>> temperature of the exhaust. Consensus at Montgomery was that possibly,
>> the
>> indication was inaccurate. I have heard that since then, you have
>> acquired a dual needle meter and are planning on installing that in your
>> instrument
>> panel, but have had home based projects to complete first. Since you
>> sometimes make progress and enquiring minds don't notice, I am hoping for
>> an
>> update. It is also a hope that someone else has made some progress on
>> theirs, while our MH is succumbing to entropy.
>>
>> Best,
>>
>> Carey
>> --
>> Carey from Ennis, Texas
>> 78 Royale, 500 Cadillac, Rance Baxter EFI.
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
J.R. Wright
GMC GreatLaker
GMC Eastern States
GMCMI
78 30' Buskirk Stretch
75 Avion Under Reconstruction
Michigan
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| Re: [GMCnet] Ken Henderson's EGT measurement [message #251483 is a reply to message #251437] |
Wed, 04 June 2014 07:40 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
|
Senior Member |
|
|
JR,
IIRC, the conductors were red and yellow, both very faded, and exposed for
only 1" or so at the spade connector end. The remaining 13' was SS
shielded. All appeared to be of good quality except that the apparently
fine-filament fiberglass insulation immediately began to unravel on the
worst of the two TC's. The other seemed to have some plastic binder for
the fibers, which did help -- but didn't prevent the open circuit condition
I found.
They're type K, but the meter will accept virtually any time by a simple
software setting.
Ken H.
On Tue, Jun 3, 2014 at 9:24 PM, John Wright wrote:
> Ken,
> What was the color of the jacket material and the color of each conductor
> of the thermocouples. I can get you sourced with some industrial TC if I
> know what type they are.
>
> JR Wright
> 78 Buskirk Stretch
> 75 Avion
> Michigan
>
> On Jun 3, 2014, at 5:52 PM, Ken Henderson wrote:
>
>> Carey,
>>
>> You have the tale quite accurate. And I have only a little more to add.
>> Shortly after the trip to TX, I sent an email to Auber support and got
>> back a list of troubleshooting tips, most of no value. After a couple
> of
>> weeks, I finally got around to troubleshooting and proved that both
>> thermocouples were bad -- in different ways. The dual meter is still
>> mounted on the dash with short copper jumpers across the TC inputs, one
> of
>> the prescribed tests. It does, indeed read the ambient temperature
> quite
>> accurately and consistently between the two circuits, as predicted.
>>
>> Auber promised to send me two more TC's, of a slightly different, more
>> robust, design. They're overdue and I'll be checking with them
> tomorrow to
>> find out why.
>>
>> As for the dual needle EGT gauge from Sun'n'Fun, it's still here but
>> untouched. Until I get thermocouples that work, whether from Auber or
>> elsewhere, I'm not going to try it out.
>>
>> I should mention that while Auber's products, in general, seem to be of
>> good quality, the conductor insulation on the two thermocouples was
>> horrible -- as bad as I've ever seen in my 65 years of electronics
>> tinkering. One was better than the other, but both were bad. That may
> be
>> the cause of Auber's delay -- I told them I'd send back any replacements
>> with comparably poor insulation.
>>
>> When I finally do something, I'll let y'all know.
>>
>> Ken H.
>>
>>
>> On Mon, Jun 2, 2014 at 10:45 PM, Carey Bryan
> wrote:
>>
>>> Ken,
>>>
>>> Is there any news on your EGT setup? To recap your adventure so far,
> you
>>> got one of those dual digital EGT setups and mounted the thermocouples
>>> (sending units) down the header pipes a few inches from the cast iron
>>> manifolds. You used two, one on each side. The experience was that it
>>> showed
>>> 1400 degrees F during mild cruise conditions. Due to your experience
> with
>>> the exhaust valve overheating in its guide and sticking, breaking the
> valve
>>> pedestal in your Cadillac 500, you were concerned with the indicated
> high
>>> temperature of the exhaust. Consensus at Montgomery was that possibly,
>>> the
>>> indication was inaccurate. I have heard that since then, you have
>>> acquired a dual needle meter and are planning on installing that in
> your
>>> instrument
>>> panel, but have had home based projects to complete first. Since you
>>> sometimes make progress and enquiring minds don't notice, I am hoping
> for
>>> an
>>> update. It is also a hope that someone else has made some progress on
>>> theirs, while our MH is succumbing to entropy.
>>>
>>> Best,
>>>
>>> Carey
>>> --
>>> Carey from Ennis, Texas
>>> 78 Royale, 500 Cadillac, Rance Baxter EFI.
>>> _______________________________________________
>>> GMCnet mailing list
>>> Unsubscribe or Change List Options:
>>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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|
|
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| Re: [GMCnet] Ken Henderson's EGT measurement [message #251494 is a reply to message #251483] |
Wed, 04 June 2014 09:45 |
powerjon
Messages: 2446
Registered: January 2004
Karma: 5
|
Senior Member |
|
|
Ken,
Type âKâ is the one that you want to use as its range goes to 2282 degF although a Type âEâ is the one that is being used in industry more today with its range that goes to 1625 degF, At the business end of the thermocouple what type of end do you need, how do you attach it to the point of measurement? I still do consulting for instrument design on the side so I still have current resource materials available. How long a thermocouple and how long a lead to you need and I can possible give you some choices.
JR
On Jun 4, at 8:40 AM, Ken Henderson wrote:
> JR,
>
> IIRC, the conductors were red and yellow, both very faded, and exposed for
> only 1" or so at the spade connector end. The remaining 13' was SS
> shielded. All appeared to be of good quality except that the apparently
> fine-filament fiberglass insulation immediately began to unravel on the
> worst of the two TC's. The other seemed to have some plastic binder for
> the fibers, which did help -- but didn't prevent the open circuit condition
> I found.
>
> They're type K, but the meter will accept virtually any time by a simple
> software setting.
>
> Ken H.
>
> On Tue, Jun 3, 2014 at 9:24 PM, John Wright wrote:
>
>> Ken,
>> What was the color of the jacket material and the color of each conductor
>> of the thermocouples. I can get you sourced with some industrial TC if I
>> know what type they are.
>>
>> JR Wright
>> 78 Buskirk Stretch
>> 75 Avion
>> Michigan
>>
>> On Jun 3, 2014, at 5:52 PM, Ken Henderson wrote:
>>
>>> Carey,
>>>
>>> You have the tale quite accurate. And I have only a little more to add.
>>> Shortly after the trip to TX, I sent an email to Auber support and got
>>> back a list of troubleshooting tips, most of no value. After a couple
>> of
>>> weeks, I finally got around to troubleshooting and proved that both
>>> thermocouples were bad -- in different ways. The dual meter is still
>>> mounted on the dash with short copper jumpers across the TC inputs, one
>> of
>>> the prescribed tests. It does, indeed read the ambient temperature
>> quite
>>> accurately and consistently between the two circuits, as predicted.
>>>
>>> Auber promised to send me two more TC's, of a slightly different, more
>>> robust, design. They're overdue and I'll be checking with them
>> tomorrow to
>>> find out why.
>>>
>>> As for the dual needle EGT gauge from Sun'n'Fun, it's still here but
>>> untouched. Until I get thermocouples that work, whether from Auber or
>>> elsewhere, I'm not going to try it out.
>>>
>>> I should mention that while Auber's products, in general, seem to be of
>>> good quality, the conductor insulation on the two thermocouples was
>>> horrible -- as bad as I've ever seen in my 65 years of electronics
>>> tinkering. One was better than the other, but both were bad. That may
>> be
>>> the cause of Auber's delay -- I told them I'd send back any replacements
>>> with comparably poor insulation.
>>>
>>> When I finally do something, I'll let y'all know.
>>>
>>> Ken H.
>>>
>>>
>>> On Mon, Jun 2, 2014 at 10:45 PM, Carey Bryan
>> wrote:
>>>
>>>> Ken,
>>>>
>>>> Is there any news on your EGT setup? To recap your adventure so far,
>> you
>>>> got one of those dual digital EGT setups and mounted the thermocouples
>>>> (sending units) down the header pipes a few inches from the cast iron
>>>> manifolds. You used two, one on each side. The experience was that it
>>>> showed
>>>> 1400 degrees F during mild cruise conditions. Due to your experience
>> with
>>>> the exhaust valve overheating in its guide and sticking, breaking the
>> valve
>>>> pedestal in your Cadillac 500, you were concerned with the indicated
>> high
>>>> temperature of the exhaust. Consensus at Montgomery was that possibly,
>>>> the
>>>> indication was inaccurate. I have heard that since then, you have
>>>> acquired a dual needle meter and are planning on installing that in
>> your
>>>> instrument
>>>> panel, but have had home based projects to complete first. Since you
>>>> sometimes make progress and enquiring minds don't notice, I am hoping
>> for
>>>> an
>>>> update. It is also a hope that someone else has made some progress on
>>>> theirs, while our MH is succumbing to entropy.
>>>>
>>>> Best,
>>>>
>>>> Carey
>>>> --
>>>> Carey from Ennis, Texas
>>>> 78 Royale, 500 Cadillac, Rance Baxter EFI.
>>>> _______________________________________________
>>>> GMCnet mailing list
>>>> Unsubscribe or Change List Options:
>>>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>>>>
>>> _______________________________________________
>>> GMCnet mailing list
>>> Unsubscribe or Change List Options:
>>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
J.R. Wright
GMC GreatLaker
GMC Eastern States
GMCMI
78 30' Buskirk Stretch
75 Avion Under Reconstruction
Michigan
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