Go Back   iRV2 Forums > MOTORHOME FORUMS > Class A Motorhome Discussions
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
 
Thread Tools Search this Thread Display Modes
 
Old 06-28-2016, 10:44 AM   #1
Junior Member
 
Join Date: May 2012
Posts: 23
Exhaust gas temperature (Pyrometer)

When I used to pull a travel trailer with our 7.3 Powerstroke diesel F-250, I installed a Pyrometer probe in the exhaust manifold with pillar mounted guage and was glad I did because it changed my driving habits. The Powerstroke when pushed made about 23-25 lbs of boost and EGT registered around 12-1400 degrees. Seeing that, I always backed off some on the long uphill pulls.
Our Holiday Rambler motor home has a Cummins ISB that will blow 30 pounds of boost but I have no way of knowing what the EGT is registering. Granted the computer probably back throttles if the EGT goes beyond a preset limit but I want to see what is going on. The problem is the Cummins is about 30' behind me. My question is: Has anyone on this forum installed an EGT gauge and if so, was it a big deal and what brand of gauge with extra long pyrometer wiring did you find?
__________________

__________________
beboboy9 is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 06-28-2016, 10:49 AM   #2
Senior Member
 
plasma800's Avatar
 
Fleetwood Owners Club
Join Date: Nov 2013
Location: Houston, Texas
Posts: 3,198
Blog Entries: 1
interesting question.

Surely you are correct that the engine will back off and sound a warning at overtemp, but I wonder if there is a connector under your dash where you could monitor this........

I've heard of this before, be can't recall any of the details on the device to do it...
__________________

__________________
RVM#78 - -USAF- F-15 Eagle Radar Vet
'05 Fleetwood Revolution '12 Chevy 2500 '15 Airstream Intl Sig. 27FB
'14 Ram 3500 Aisin
plasma800 is offline   Reply With Quote
Old 06-28-2016, 10:53 AM   #3
Senior Member
 
plasma800's Avatar
 
Fleetwood Owners Club
Join Date: Nov 2013
Location: Houston, Texas
Posts: 3,198
Blog Entries: 1
Kind of remembering.. wondering if a "scan-gauge" would tell you this info.... Or silverleaf VMS?
__________________
RVM#78 - -USAF- F-15 Eagle Radar Vet
'05 Fleetwood Revolution '12 Chevy 2500 '15 Airstream Intl Sig. 27FB
'14 Ram 3500 Aisin
plasma800 is offline   Reply With Quote
Old 06-28-2016, 10:54 AM   #4
Senior Member
 
plasma800's Avatar
 
Fleetwood Owners Club
Join Date: Nov 2013
Location: Houston, Texas
Posts: 3,198
Blog Entries: 1
also, these guys might now how to do it

Banks Power | Why EGT is Important
__________________
RVM#78 - -USAF- F-15 Eagle Radar Vet
'05 Fleetwood Revolution '12 Chevy 2500 '15 Airstream Intl Sig. 27FB
'14 Ram 3500 Aisin
plasma800 is offline   Reply With Quote
Old 06-28-2016, 11:02 AM   #5
Senior Member
 
Join Date: Jun 2016
Location: Nine Mile Falls WA / Arizona City AZ
Posts: 524
I don't know of any larger engines that have a EGT (Exhaust gas temperature) probe in the exhaust... to gather this information you need a probe in the exhaust stream behind the turbo... the way an O2 senor is in the exhaust of a gas engine....

I also use EGT information on my truck especially when I tow... just like, beboboy9 shares...

I wonder if when they put these engines on a dyno during the design process they have the ability to add and see the EGT information and than change the programming...

Also remember that most light trucks... F450, 4500, etc and under are never really designed to tow and work like the mid range trucks are with the mid range engines.. the CAT 3126, C7 and other 7-8 Liter Cummins engines have such a larger safety margin in their design....

But I'd like a EGT gauge in my DP.. maybe a email to ispro is needed...
__________________
jelag is offline   Reply With Quote
Old 06-28-2016, 11:10 AM   #6
Senior Member
 
road dogs's Avatar
 
Join Date: Jan 2013
Location: 7S5
Posts: 571
Look for a probe that has a sending unit which allows you to route the TC leads to the sending unit and regular copper wires from the sending unit to the gauge. I have an Isspro EGT gauge, but I'm sure most of the better quality gauges use a similar setup.
__________________
2004.5 GMC SLT CCLB, Ride Rites, Turbo brake, EFI Live
2012 Arctic Fox 29 5T 5th Airborne, B&W, Prodigy
Papillon navigators Lily, Buddy and Willow
road dogs is offline   Reply With Quote
Old 06-28-2016, 11:32 AM   #7
Senior Member
 
RSteele's Avatar
 
Join Date: Jun 2012
Posts: 156
No the engine will not back itself off. EGT is not monitored by the engine Ecm. Maybe on the newer engines with Def systems, they have a lot of probes in the exhaust stream but I'm not sure if they actually monitor heat. If you are towing heavy and really lug the engine down to low rpm going up steep hills you can burn a piston. The Ecm will never know until it's too late. In stock engine configuration it is not a huge concern because most folks will downshift before egt's become high enough to do damage and they are designed to work as they are. When an engine is modified with fuel, timing and boost changes it can become more if a problem. More fuel, more weight = more heat. A lot of OTR trucks have pyrometers for the driver to monitor. I have put pyrometers in both DP's I have owned and my truck. The pyrometer in my truck is post turbo and the guage is calibrated for a post turbo install because it is lower temp than a manifold installed probe. I put the probe for the DP in the manifold. Banks makes a guage with a 50' cable. The banks probe is larger than the isspro or autometer probes. I have an isspro guage and probe in my current DP, they make different length wiring harnesses. I had an 04 Winnebago with a C-7 cat. I put a banks pyrometer in it but also put a TS performance programmer in it and a free flowing exhaust. My newer coach with an ISL I used isspro because of the smaller hole needed in the manifold. I find using a performance muffler helps lower EGT's about 200 degrees on a long steep hill. I think an EGT guage is great info even on a stock engine but you can definetly live without it too.
__________________
07 Winnebago Vectra 40 TD ISL 400. Tru-balance, centramatics, Koni shocks
RSteele is offline   Reply With Quote
Old 06-28-2016, 12:44 PM   #8
Senior Member
 
Country Coach Owners Club
Join Date: Jan 2006
Location: Redding
Posts: 3,412
TST Power Kit without Video

These guys have gauges and sell to MH DP owners.
__________________
Dean
1995 CC Magna #5280
C8.3L 300hp Cummins, 31,000lbs
deandec is offline   Reply With Quote
Old 06-28-2016, 01:25 PM   #9
Senior Member
 
Join Date: Jun 2016
Location: Nine Mile Falls WA / Arizona City AZ
Posts: 524
An email back from ISSPRO share's that any of their custom gauge dealers can put together a kit which will allow them to function on a diesel pusher....

I agree with rsteele.... that the engine won't back itself off... but the design of these larger engines is such that you can't push the pedal to the metal and melt them down.. any simple alterations to the "pickup" style diesel engine means you need to monitor what's going on... as they just aren't designed for the weight... at least that's my view...
__________________
jelag is offline   Reply With Quote
Old 06-28-2016, 07:28 PM   #10
Senior Member
 
FIRE UP's Avatar


 
Join Date: Dec 2009
Location: Out there, somewhere
Posts: 5,262
Well Gang,
To me, this is one of those things that, it's a preference on just how much you want or need to monitor, your engines status, as you drive down the road. I'm not any form of an expert, at all. But, as a factory setup in our coach, an '04 Itasca Horizon with the C-7 330HP CAt, it has more redundency than you can shake a stick at. The ONLY thing I don't have, is an EGT.

I've got three screens, the dash itself, a Medallion Information Center and, what's called the "Trip-Tek" information system that's overlaid on the screen of my backup monitor. All of those tell me the usual, oil pressure, volts, gear position, temp, turbo psi, trans temp, air pressure, mileage(cumulative, average, immediate etc.) and possibly more.

I kind-a figure if either the engine manufacturer, or chassis mfgr, possibly even the coach builder wanted me to monitor the exhaust temp, I'd have that in the screens too. But, again, I'm not an expert. This coach now has 66K on the clock and has been all over the west and mid west, on some of the largest hills and grades. It hasn't grenaded yet. I pay attention to the temp and drive accordingly.

If you feel the need to monitor EGT, well, I guess if you don't have the setup to do it, then add whatever it takes to. I got enough gauges and screens to watch. Good luck.
Scott
__________________
2004 ITASCA HORIZON 36GD, 2011 GMC Sierra 1500 4x4 Toad '08 GL 1800 Gold Wing
Retired-29.5 yrs, SDFD, Ham - KI6OND
Me, Karla and the Sophie character, (mini Schnauzer)
FIRE UP is offline   Reply With Quote
Old 06-28-2016, 08:06 PM   #11
Senior Member
 
slickest1's Avatar
 
Monaco Owners Club
Join Date: Jul 2011
Location: B.C.
Posts: 3,708
When pulling a hill and your water temp. starts to climb, it is time to shift down and bring up the rpm's. Having driven alot of different vehicles with pyrometers they sort or go hand in hand with your water temp. gauge. When an engine has been upgraded with a chip or such technology then a pyrometer is much more valuable as the exhaust temps. can climb alot faster.
__________________
Dennis & Marcie & Captain Hook The Jack Russell,aka PUP, 04 Dodge/Cummins 01 Citation 29.rk fifth wheel.RVM59
slickest1 is offline   Reply With Quote
Old 06-28-2016, 08:13 PM   #12
Senior Member
 
Mr_D's Avatar
 
Solo Rvers Club
iRV2 No Limits Club
Join Date: May 2011
Location: Vancouver, WA
Posts: 28,416
Quote:
Originally Posted by beboboy9 View Post
When I used to pull a travel trailer with our 7.3 Powerstroke diesel F-250, I installed a Pyrometer probe in the exhaust manifold with pillar mounted guage and was glad I did because it changed my driving habits. The Powerstroke when pushed made about 23-25 lbs of boost and EGT registered around 12-1400 degrees. Seeing that, I always backed off some on the long uphill pulls.
Our Holiday Rambler motor home has a Cummins ISB that will blow 30 pounds of boost but I have no way of knowing what the EGT is registering. Granted the computer probably back throttles if the EGT goes beyond a preset limit but I want to see what is going on. The problem is the Cummins is about 30' behind me. My question is: Has anyone on this forum installed an EGT gauge and if so, was it a big deal and what brand of gauge with extra long pyrometer wiring did you find?
I did on an ISC, but it was part of a Banks PowerPack install. One wire for the boost gauge and one for the EGT. Wish I had one on the present ISX but Cummins says it wouldn't help as the engine programming won't let the EGT get too high.
__________________
2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft
Charter Good Sam Lifetime Member, FMCA, SKP
RV'ing since 1957, NRA Benefactor Life, towing '14 CR-V
Mr_D is offline   Reply With Quote
Old 06-28-2016, 11:09 PM   #13
"Formerly Diplomat Don"
 
Dutch Star Don's Avatar
 
Newmar Owners Club
Join Date: Apr 2005
Location: Moorpark, Ca.
Posts: 9,279
I have to agree with Scott. Cummins DOES NOT look at pyro temps and you don't hear of anyone burning holes in pistons in their motor homes. Unless you're heavily modifying a motor home engine, I don't see the need to add a pyrometer.

I had a 400 ISL that I chipped, adding 52 HP via fuel timing. The only thing I watched, which the Cummins ECM monitors, is intake manifold temps. They didn't change with the chip.

Obviously, if you feel the need to add a pyrometer, go for it, but it seems like a waste of time and energy. Now, if you were doing tractor pulls in a mud bog, maybe it would be useful.
__________________
Don & Mary
2014 Newmar Dutch Star - All Electric - 450 ISL
2016 GMC Canyon 4WD Crew Cab
Dutch Star Don is offline   Reply With Quote
Old 06-29-2016, 02:03 AM   #14
Senior Member
 
SuperGewl's Avatar
 
Winnebago Owners Club
Ford Super Duty Owner
Join Date: Aug 2004
Location: Oregon
Posts: 1,781
Quote:
Originally Posted by Dutch Star Don View Post
I have to agree with Scott. Cummins DOES NOT look at pyro temps and you don't hear of anyone burning holes in pistons in their motor homes. Unless you're heavily modifying a motor home engine, I don't see the need to add a pyrometer.

I had a 400 ISL that I chipped, adding 52 HP via fuel timing. The only thing I watched, which the Cummins ECM monitors, is intake manifold temps. They didn't change with the chip.

Obviously, if you feel the need to add a pyrometer, go for it, but it seems like a waste of time and energy. Now, if you were doing tractor pulls in a mud bog, maybe it would be useful.

Cool I'd love to see a DP doing Tractor Pulls and Mud Bogging
__________________

__________________
Retired Navy Submariner
2014 Itasca Sunstar 35F; 5 Star tuned; 2014 Jeep Cherokee TrailHawk
SuperGewl is offline   Reply With Quote
Reply

Tags
gas



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Exhaust gas temperature warning light jondrew Freightliner Motorhome Chassis Forum 2 03-28-2016 09:51 AM
Cummins 400 Exhaust Gas Temperature TipS Cummins Engines 11 10-25-2014 01:39 AM
Pyrometer and Exhaust Manifold Sundancer268 Cummins Engines 1 07-20-2011 07:44 PM
Installation of Exhaust Pyrometer HELP! Gadget Man Caterpillar Engine Forum 14 04-09-2011 11:40 PM
Pyrometer harness Jestme13 MH-General Discussions & Problems 4 10-19-2006 10:55 AM

» Virginia Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 04:35 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.