lets talk EGT's????
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Senior User
Joined: Feb 2004
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From: Southdakota
lets talk EGT's????
Ok,
I would like to discuss EGTs. I have just done several upgrades to my truck and ordered my pyrometer today so i can keep an eye on what is going on. More gauges to come but this is the first.
1) What is a normal EGT for hwy speeds
2) " " for town driving
3) What is the highest you would want to see before backing off
4) what is the highest you have had it up to with and without problems
Everything I read on the subject says 1300 deg is the max on stock trucks but i get conflicting information when it comes to modified trucks......
Some say that 1300 is the top no matter what others say 1500 if not more than a minute or two..... So what do all of you think?
I know that the melting point of aluminum is 1220 if it is pure but the engine block should not be seeing that kind of temp just because the heads are correct?
Thanks for any input!
JT
I would like to discuss EGTs. I have just done several upgrades to my truck and ordered my pyrometer today so i can keep an eye on what is going on. More gauges to come but this is the first.
1) What is a normal EGT for hwy speeds
2) " " for town driving
3) What is the highest you would want to see before backing off
4) what is the highest you have had it up to with and without problems
Everything I read on the subject says 1300 deg is the max on stock trucks but i get conflicting information when it comes to modified trucks......
Some say that 1300 is the top no matter what others say 1500 if not more than a minute or two..... So what do all of you think?
I know that the melting point of aluminum is 1220 if it is pure but the engine block should not be seeing that kind of temp just because the heads are correct?
Thanks for any input!
JT
Posting Guru
Joined: Apr 2008
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From: Albemarle, NC
I have only seen 1200 once and that was during a truck pull. On the hwy mine never gets much over 800 or so. You dont want the probe in the exhaust, needs to be before the turbo. The drivers manifold is the easiest place.
Posting Guru
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you don't want to run hotter than 1250 deg. anything hotter for a long time can cause damage and things start to melt. but 1250 deg people say is fine all day long for these engines. short bursts depending on how powerful the tune is can shoot up to 1500-1700deg for just a sec.
06silvercrew- what tune to you run? you sig say's innovative custom but you have never seen over 1200 and that was on a truck pull?? that seems super low IMO. maybe you have just a low power or transmission only tune. i am just interested and wondering...
06silvercrew- what tune to you run? you sig say's innovative custom but you have never seen over 1200 and that was on a truck pull?? that seems super low IMO. maybe you have just a low power or transmission only tune. i am just interested and wondering...
Posting Guru
Joined: Oct 2005
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what temps i see with my truck and custom tunes
1) What is a normal EGT for hwy speeds
700-800 deg flat and up to 1000 up a grade. this is running at 75mph
2) " " for town driving
500-700 deg and at idle around 400 deg
700-800 deg flat and up to 1000 up a grade. this is running at 75mph
2) " " for town driving
500-700 deg and at idle around 400 deg
Hotshot
Joined: Dec 2003
Posts: 15,368
Likes: 121
From: Stuttgart, Ar
Hmmmmm.... "normal" EGT's . That's almost a learn as you drive thing. I see 1000 all the time. 1250-1300 around town when accellerating is fairly normal for my truck. One thing you will learn is that EGT's go up and down VERY quickly. I couldn't tell you how many times I've seen 1500-1600 on my pistons and now I'm at 143K or so miles. It's all about temp vs. time. and using your head. 1500/1600 down the quartermile for 15 seconds won't hurt squat. You have a BIG exhaust and it will cool quickly. Just don't shut it off quickly as some idle time is beneficial here.
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Post Fiend
Joined: Oct 2005
Posts: 10,626
Likes: 7
From: Plano TX and Brentwood TN
That depends on your scenerio. Hills? Type of tune? How fast you like to go? Configuration of the truck(including(but not limited to) if it's hooked up to a trailer and if so, what type)?
Same as previous answer.
1250 all day long is the general thought(as has already been mentioned) on the highest. Above that depends on really how long you keep it there.
Everything I read on the subject says 1300 deg is the max on stock trucks but i get conflicting information when it comes to modified trucks......
Some say that 1300 is the top no matter what others say 1500 if not more than a minute or two..... So what do all of you think?
Some say that 1300 is the top no matter what others say 1500 if not more than a minute or two..... So what do all of you think?
Now this is just me, but I wouldn't have it at 1500 for a minute of two, that's too long for me.
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Thread Starter
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Senior User
Joined: Feb 2004
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From: Southdakota
Thank you for the input
I guess I will have to just play around with it once I get the gauge in and see what happens. I got a gauge that will go up to 2200 so i think I should be able to see the top end at all times!
I have the plain Street tune loaded and feel there is plenty of NON studded power at this time.
Over all it seems like 1250 is the magic number to stay away from or the back off point when pulling a hill
I have a 21 ft Skeeter boat and a 28 ft Terry camper that i pull regularly I mainly wanted to know when I should be backing off. I live in western South Dakota in the Black Hills so there are some long hills that I run regularly.
I guess the only thing i would like to address further is the probe location. The only mounting locations I have found with the search was on the manifold..... However, The only forums that i could find anyone talking about this was in the 7.3 section. I really have no feeling one way or another on the subject just want to make sure I get it right
There was one post that showed two gauges with two temp ranges. One was for pre turbo and one was for post turbo.......
Thanks guys!
JT
I guess I will have to just play around with it once I get the gauge in and see what happens. I got a gauge that will go up to 2200 so i think I should be able to see the top end at all times!
I have the plain Street tune loaded and feel there is plenty of NON studded power at this time.
Over all it seems like 1250 is the magic number to stay away from or the back off point when pulling a hill
I have a 21 ft Skeeter boat and a 28 ft Terry camper that i pull regularly I mainly wanted to know when I should be backing off. I live in western South Dakota in the Black Hills so there are some long hills that I run regularly. I guess the only thing i would like to address further is the probe location. The only mounting locations I have found with the search was on the manifold..... However, The only forums that i could find anyone talking about this was in the 7.3 section. I really have no feeling one way or another on the subject just want to make sure I get it right
There was one post that showed two gauges with two temp ranges. One was for pre turbo and one was for post turbo.......
Thanks guys!
JT
Posting Guru
Joined: Apr 2008
Posts: 2,424
Likes: 2
From: Albemarle, NC
Hmmmmm.... "normal" EGT's . That's almost a learn as you drive thing. I see 1000 all the time. 1250-1300 around town when accellerating is fairly normal for my truck. One thing you will learn is that EGT's go up and down VERY quickly. I couldn't tell you how many times I've seen 1500-1600 on my pistons and now I'm at 143K or so miles. It's all about temp vs. time. and using your head. 1500/1600 down the quartermile for 15 seconds won't hurt squat. You have a BIG exhaust and it will cool quickly. Just don't shut it off quickly as some idle time is beneficial here.
Holy crap batman, wonder why these vary so much from one truck to another? Wonder how accurate my/your gauge is? Pulling 30K pounds at a truck pull and I never got much if any over 1300* Never seen it over 1200* on the street or at the dragstrip.
got me wondering now.
Senior User
Joined: Jul 2008
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From: Barrington, NH
Install probe in drivers side manifold, pretty easy access to drill and tap from under the truck. Start with 1/8" bit and work your way up to the final size by 1/16ths. then take a magnet and vacuum to get any filings left in the manifold. Most probes are 1/8 " npt
Lead Driver
Joined: Jun 2007
Posts: 6,757
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From: Corvallis, OR
You're drilling in cast iron, so it really just produces dust and a few crumbs. I went up one bit size at a time, then cleaned it out with vacuum and a q-tip with neverseize on it, didn't have any problems.
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Senior User
Joined: Feb 2004
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From: Southdakota
Manifold it is! Thanks.
Does any one know why some people choose post turbo for a monitoring point?
06silvercrew. I would suggest you see if you can take an external reading to check calibration of your gauge. I have a laser temp gun i use at work and considered using it to check and see how close they both read. I know in my line of work I frequently get sensors out of the box that are WAAAAYYY off and have to be calibrated.
FWIW.
Does any one know why some people choose post turbo for a monitoring point?
06silvercrew. I would suggest you see if you can take an external reading to check calibration of your gauge. I have a laser temp gun i use at work and considered using it to check and see how close they both read. I know in my line of work I frequently get sensors out of the box that are WAAAAYYY off and have to be calibrated.
FWIW.