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02-17-2008, 07:52 PM
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#1
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Senior Member
Join Date: Sep 2003
Location: No. CA
Posts: 405
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I've been reading about EGT in diesels and wonder what the max EGT would be for a 2006 Duramax LLY? Also, how does one go about lowering EGT when towing and/or climbing hills?
Thanks,
Paul
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Paulin
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02-17-2008, 07:52 PM
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#2
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Senior Member
Join Date: Sep 2003
Location: No. CA
Posts: 405
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I've been reading about EGT in diesels and wonder what the max EGT would be for a 2006 Duramax LLY? Also, how does one go about lowering EGT when towing and/or climbing hills?
Thanks,
Paul
__________________
Paulin
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02-18-2008, 10:54 AM
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#3
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Senior Member
Join Date: Aug 2001
Location: North America somewhere
Posts: 30,593
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<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by Paulin:
I've been reading about EGT in diesels and wonder what the max EGT would be for a 2006 Duramax LLY? Also, how does one go about lowering EGT when towing and/or climbing hills?
Thanks,
Paul </div></BLOCKQUOTE>
You will fnd many pages of discussion at: dieselplace.com. This is arguably the best website for Duramax information. At 1,350*F aluminum pistons, valves, and combustion chamber areas begin to sustain damage, as the temperature rises even higher those parts sustain damage at a faster rate.
To reduce EGT two things are vital, reduce engine stress and increase engine cooling.
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2000 Winnebago Ultimate Freedom USQ40JD , ISC 8.3 Cummins 350, Spartan MM Chassis. USA IN 1SG 11B5MX,Infantry retired;Good Sam Life member,FMCA. " My fellow Americans, ask not what your country can do for you, ask what you can do for your country. John F. Kennedy
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02-19-2008, 04:27 PM
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#4
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Moderator Emeritus
Oklahoma Boomers Club
Join Date: Apr 2002
Location: Sand Springs, Oklahoma
Posts: 2,902
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As Ray said, the dieselplace has a wealth of info but from my experience, the temps all depend on whether your pyro is in the manifold or in the downpipe. That makes a big difference as to the temps, I have mine in the downpipe and I don't let the temps get over 1050 and try to stay below 1000. When in the manifold you want to stay below 1300-1350.
I find that the temps rise when you start to lug the engine, what I usually do is force a downshift if I see the temps getting too high which increases the rpm's and cools the EGT's down by adding more air. Your findings may be different than mine but that is how I handle my engine. In some rare situations I have had to back off the pedal even after downshifting to baby it up the hill because of the temps. But usually I keep it ripping with a downshift and keep pedaling. Keep the RPM's up and hammer down.
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Tom
KE5NCP
2016 Winnebago Sunstar LX 36Y, 2018 Wrangler unlimited Rubicon
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02-20-2008, 04:03 AM
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#5
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Senior Member
Texas Boomers Club
Join Date: Jul 2000
Location: Cypress, Texas USA
Posts: 8,854
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In general, if your EGTs get excessive when pulling a grade:
1. Downshift. This increases airflow per unit of time through the engine as well as lowering BMEP for a given BHP output. Both should lower EGT.
2. If that's not enough, pull your right foot out of the smoke pedal (the long, skinny one on the right). That's what we mean when we say that we're "driving by the pyrometer" on grades.
Rusty
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02-29-2008, 02:24 PM
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#6
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Senior Member
Join Date: Oct 2000
Location: St. Augustine, FL
Posts: 123
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When I replaced my stock exhaust with a 4 inch cat back system, my EGT's dropped 150 degrees when pulling. EGT on grades used to run around 1350, but it seldom goes over 1200 now.I'm told removing the cat will reduce EGT's further, but you're taking a chance with the Feds.
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2002 Jayco Eagle 300FSS Travel Trailer, 2005 Chevy 2500HD Crew Cab 4X4 w/Duramax, RDS 60 Gallon Toolbx/Tank Combo, Edge EZ, Boost Stick, Bilstein Shocks, Michelin 265 MS2, Isspro Pyrometer and Boost Gauges, ARE Topper, Honda EU3000
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03-15-2008, 02:23 PM
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#7
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Senior Member
Join Date: Dec 2006
Location: Foxboro Ma.
Posts: 1,080
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duramax can be safely run all day 1400* pre turbo
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2015 42' Redwood RL38 Morryde IS , disk brakes, 1920W of solar with Victron everything,5 Battleborn, 2024 GMC DRW 3500HD ,60 gallons of fuel in the bed,Hensley BD5 air ride hitch.
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