EGT temps??
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Fleet Mechanic
Joined: Oct 2003
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From: CentralEastern Utah
EGT temps??
I've seen alot of different opinions on what the max safe egt is for our trucks. I pulled the other day over the mountian with a few horses. Mind you i'm stock(no chip)nd I decided to dirve it like I always had before I had gauges. Right before I topped out I was at 1325 deg. I've seen people say that 1200 is max and i've seen posts where 1400 is max. So I guess what i'm getting at is what the max egt should one go when towing. Also this should send out a big warning for those who tow with a chip (or not) with out gauges. I wonder how hot that whould have been with the stock dp and a cat in place? Thanks Layne
Last edited by ltfox; Jan 22, 2005 at 11:04 PM.
Post Fiend
Joined: Jun 2004
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From: Parker, CO
There's quite a few who have argued about what the true safe temps are. But like your case, there have been many who have pushed passed the 1300 degree temps for a short time with no harm done, and some who have gone even further. Now if you held that temp for a longer period of time, then I would be worried.
BTW, where is your pyro probe located? Is it pre or post turbo. If it's post turbo, then you may have actually gone way past 1325. Just FWIW.
BTW, where is your pyro probe located? Is it pre or post turbo. If it's post turbo, then you may have actually gone way past 1325. Just FWIW.
Posting Guru
Joined: Aug 2004
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From: Braham MN
There is a thread on the 6.0 forum about this, the kid has hit 1500* for extended periods of time and he says that there is no damage to the piston. He ripped the motor down cuz he blew a head gasket. https://www.ford-trucks.com/forums/s...d.php?t=334225. Just cuz your egt's are a certain temp doesnt mean your pistons are that hot, they have oil squirtes that shot a stream of oil onto the underside of the piston, cooling it and lubricating it. the EGT's are the temperature of the gasses coming out of the cylinders, so a spike will not nessecarily mean your pistons are that hot, it a good indication, but not always the actual temperature. I would bet when it is held at these temps for MILES then yes, that is prolly what your pistons are seeing, but the occational run of 1500* aint gunna hurt anything. just have to know what your doin, and when to back off.
As for the initial question, I can only hit 1200* right now on a dead run, with the intake and exhaust i have it barely holds 600* at 60. but when the chip is in I will not be scared to hit 1500* for a while before I back off.
Diesel Rod
As for the initial question, I can only hit 1200* right now on a dead run, with the intake and exhaust i have it barely holds 600* at 60. but when the chip is in I will not be scared to hit 1500* for a while before I back off.
Diesel Rod
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From: IOWA
As dieselrod said, the gauge is only reading the gasses, so your pistons aren't actually that hot. Many say don't go about 1200* just as a precaution, so you aren't riding at that temp rolling down the interstate, then you will have problems. If you hit about that for a short period of time, you will be fine, just don't hold it up there for an extended period.
Fleet Owner
Joined: Jun 2004
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From: Rio Rico, AZ.
Originally Posted by ltfox
I've seen alot of different opinions on what the max safe egt is for our trucks. I pulled the other day over the mountian with a few horses. Mind you i'm stock(no chip)nd I decided to dirve it like I always had before I had gauges. Right before I topped out I was at 1325 deg. I've seen people say that 1200 is max and i've seen posts where 1400 is max. So I guess what i'm getting at is what the max egt should one go when towing. Also this should send out a big warning for those who tow with a chip (or not) with out gauges. I wonder how hot that whould have been with the stock dp and a cat in place? Thanks Layne
Posting Guru
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From: Braham MN
Originally Posted by Kwikkordead
Thanks for the warning Itfox. Whenever I tow up a pass it's full throttle to maintain speed and I always wondered if it was getting too hot.
Kwik you should know that you should at least have a pyro. tsk. tsk.
Diesel Rod
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Fleet Mechanic
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From: CentralEastern Utah
That time I was in fourth doing about 70, full throttle around 3000 rpms. that was the way I always pulled before I got the gauges so I did the same thing to see what temps I got.
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From: Cabot, Arkansas
Forged aluminum will reach it's melting point at just above 1250* F. Fortunately 444dieselrod and farmbOy are correct, you are reading the air temperature and not the actual piston temp. Those guys that are drag racing and truck pulling their rigs are seeing EGT's in the 1800-2000 degree range fairly often. That does not mean they are not damaging the engine, just that it takes some time even at extreme EGT's. In my opinion 1300-1400 degrees shouldn't be a concern for the few minutes it takes to climb the hill.
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From: LAKE FORK TEXAS
I Played around after i got my first set of gauges pulling my bass boat and the most i could ever get with stock programming was 1000*, and that was without the factory muffler but the factory exhaust and intake. With my SCMT on the 70hp setting I can hit 1200 but then it starts to drop back to about 1100. My Boat only weighs about 4000lbs, so thats not much of a load but even on the 90hp setting it wouldnt go over 1200 when i was pulling some good mountains in Northern Arkansas. With my 4" down pipe,straight exhaust and the Kwik filter,hammered from a dead stop to about 75mph I havent gotten it to go past 1200 pulling my 8000# Travel trailer and my 4000lb bass boat at the same time, although i havent been thru any mountains pulling them.
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From: Rio Rico, AZ.
Originally Posted by 444dieselrod
Kwik you should know that you should at least have a pyro. tsk. tsk.
Diesel Rod
Diesel Rod
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From: The Great Plains
Anyone ever melted a pyro singer pre-turbo. Everyone says to run a stinger in the exhaust manifold, but the difference between the two, and running the risk of running the stinger through the turbo/motor isn't worth it IMHO.
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From: Lewiston, Idaho
Stinger meaning a thermocouple?? Never heard it called a stinger before so i am just assuming that. I've never heard of anyone breaking one off or burning one. But i put mine pre turbo in the exhaust manifold and i am glad i did. After i installed my guages the egt temps jump quicker and are higher than i expected them to be. Also if something does get into the turbo and ruin it, you can buy a used turbo or even that of a brand new one for way less than a new motor cost. Just my thoughts.
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