How high EGT's?
Thread Starter
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Fleet Mechanic
Joined: Dec 2010
Posts: 1,546
Likes: 9
From: Wellington, Co
How high EGT's?
Hi all,
Except for the mods in my sig, (add a Wicked wheel), motor is stock. Towing a 12k fifth wheel, through mountains at altitude (5-11k), what is a sustained recommended egt high, say 1-2 minutes, and a peak you would be okay with for 10 seconds?
Pre turbo, sensor in left exhaust manifold.
I can't do water inj or other mod right now, just have to monitor and control with foot.
Thanks.
Except for the mods in my sig, (add a Wicked wheel), motor is stock. Towing a 12k fifth wheel, through mountains at altitude (5-11k), what is a sustained recommended egt high, say 1-2 minutes, and a peak you would be okay with for 10 seconds?
Pre turbo, sensor in left exhaust manifold.
I can't do water inj or other mod right now, just have to monitor and control with foot.
Thanks.
Postmaster
Joined: Jun 2010
Posts: 2,555
Likes: 8
From: Longview, TX
subscribed. That's some info i'd like to know as well. I installed some gauges this weekend, but now i'm trying to figure out why (max/min operating temps, deltas, etc...). The info is there somewhere i'm sure, just haven't located it yet. Maybe someone will respond with an answer or a link.
you can't fix stupid!
Joined: Mar 2008
Posts: 1,906
Likes: 2
they say 1250 is the max but there is more to it than that....id go no more than 1100-1200 sustained for 2 minutes the closer to 1100 the better i would think but for 10 seconds ive buried my egt gauge to 1600......just dont do it for a long time.....quick bursts up there wont hurt anything.....
Thread Starter
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Fleet Mechanic
Joined: Dec 2010
Posts: 1,546
Likes: 9
From: Wellington, Co
they say 1250 is the max but there is more to it than that....id go no more than 1100-1200 sustained for 2 minutes the closer to 1100 the better i would think but for 10 seconds ive buried my egt gauge to 1600......just dont do it for a long time.....quick bursts up there wont hurt anything.....
Elder User
Joined: Mar 2004
Posts: 580
Likes: 0
From: Chippewa Falls, WI
The highest I have ever seen mine was 1000 towing my 7000# camper up a hill on a hotish day.. dropped right back to 8-850 upon leveling off. (gauge after turbo) I guess mine is pampered compared to many I have seen here on the forum.
Posting Guru
Joined: Jul 2008
Posts: 1,736
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From: Dalton,Ga
putting the probe after the turbo can/will make a large temp difference, I would bet your actual temps are higher than you think..
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you can't fix stupid!
Joined: Mar 2008
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good catch! makes a big difference........
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Postmaster
Joined: Apr 2012
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From: North Georgia
I would leave it where it is post turbo... and add another one pre turbo... that way you can keep an eye on heat soak.
The temps on my pre turbo gauge (mounted in driver side up pipe about 2" from manifold)
Unless i put my foot to the floor and flip my 10k mod switch... i dont see any higher than 850*
When im on the floor and climbing a hill... i get up to 950-1k*.
This is a vast improvement over the 1300* i was seeing with leaky stock uppies and a turbo with blown seals.
Lots of variables that attribute to exhaust temps.
Before the repairs and new goodies from clay and 1fixitman, i could get it to peak at 1400*
It didnt seem to hurt anything... but i wouldnt stay in it long.
Xtof
The temps on my pre turbo gauge (mounted in driver side up pipe about 2" from manifold)
Unless i put my foot to the floor and flip my 10k mod switch... i dont see any higher than 850*
When im on the floor and climbing a hill... i get up to 950-1k*.
This is a vast improvement over the 1300* i was seeing with leaky stock uppies and a turbo with blown seals.
Lots of variables that attribute to exhaust temps.
Before the repairs and new goodies from clay and 1fixitman, i could get it to peak at 1400*
It didnt seem to hurt anything... but i wouldnt stay in it long.
Xtof
Postmaster
Joined: Jul 2006
Posts: 4,993
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From: Bend, OR
Good lord some of you leave a tremendous amount of power on the table...
You can pull all day long at 1250* without hurting a thing... Short of your pocket book from the fuel usage.
I just pulled my 35'TT from Oregon to Socal yesterday. Non stop, from 5am to 8pm... with the cruise set at 72 I was sitting at 1000*-1050* nearly all day. Over the Grapevine I was pulling for 15 minutes at 1200* or so...
1250* is your redline. Go over that, and its up to you how long your willing to let it go.
You can pull all day long at 1250* without hurting a thing... Short of your pocket book from the fuel usage.
I just pulled my 35'TT from Oregon to Socal yesterday. Non stop, from 5am to 8pm... with the cruise set at 72 I was sitting at 1000*-1050* nearly all day. Over the Grapevine I was pulling for 15 minutes at 1200* or so...
1250* is your redline. Go over that, and its up to you how long your willing to let it go.
Elder User
Joined: Mar 2004
Posts: 580
Likes: 0
From: Chippewa Falls, WI
That is why I included it in the reply. I know it makes a sizeable difference. I add 150-200 in my head whenever I look at the gauge anyway just out of habit. I do plan on moving the probe at some point here. Without any of the big power adders like injectors or a tune I am not that concerned right now but when I start playing in the future I will move it. Also having the free flow exhaust really gets the heat out of the system.
Posting Guru
Joined: Jul 2008
Posts: 1,736
Likes: 0
From: Dalton,Ga
Good lord some of you leave a tremendous amount of power on the table...
You can pull all day long at 1250* without hurting a thing... Short of your pocket book from the fuel usage.
I just pulled my 35'TT from Oregon to Socal yesterday. Non stop, from 5am to 8pm... with the cruise set at 72 I was sitting at 1000*-1050* nearly all day. Over the Grapevine I was pulling for 15 minutes at 1200* or so...
1250* is your redline. Go over that, and its up to you how long your willing to let it go.
You can pull all day long at 1250* without hurting a thing... Short of your pocket book from the fuel usage.
I just pulled my 35'TT from Oregon to Socal yesterday. Non stop, from 5am to 8pm... with the cruise set at 72 I was sitting at 1000*-1050* nearly all day. Over the Grapevine I was pulling for 15 minutes at 1200* or so...
1250* is your redline. Go over that, and its up to you how long your willing to let it go.
Hotshot
Joined: Jul 2008
Posts: 12,782
Likes: 2,142
From: N.GA Mountains
I used to drive-by-pyro - taking my foot out of it at 1250* on long grades. Then I got better tunes. My X, all stock except van turbo wouldn't break 1200* flat-footed up grades like Monteagle Pass towing a 12k lb Toy Hauler. I wouldn't say I no longer needed a pyro - but I stopped looking at it after awhile... 
Even at higher altitude - ie, Vail Pass, I don't have an issue in the dually with AC codes and 38R using current tunes... Haven't towed out there with the X yet....
Even at higher altitude - ie, Vail Pass, I don't have an issue in the dually with AC codes and 38R using current tunes... Haven't towed out there with the X yet....