Need to know what EGT is Bad?

[Greg Boardman-RIP]

I installed EGT guage, pre turbo, and a trans temp guage in the cooler line. I was wondering what was a hight temp in the trans and what temp to let off for the pyro. Average temp on my way home was 600*- 800*. Trans was about 100* on hwy and 170* around town. Where do I let off?

 

[SEmerson]

I have pre turbo too and I lift at 1400.

 

[RustyJC]

Originally posted by SEmerson

I have pre turbo too and I lift at 1400.

1400! I can't force pre-turbo EGT over 1200, even towing! For towing applications, I thought 1300 or so was the border to "no man's land".



Rusty

 

[SEmerson]

I pulled one load very heavy but i dont know the weight. I could get 1400 on some long hills. After that day my gray paint on my turbo had just a little yellow ting to it. I never could get a solid answer on what was too high. But I have heard that if the paint turns yellow that is marginal.

 

[Batman]

I would let off around 1300, your trans temps seem fine to me. Mine run around 140, 190 stop and go, 210 back the 5er up.

HTH

 

[Dr.Kayak]

Climbing a steep grade at full throttle my EGT was still climbing at 1400 when I let off the throttle. Have not been able to get the EGT that high with the BHAF installed.



A good rule is to not exceed 1300 for more than 30 sec.



Tran. Temp. --- I have seen 250 when off road, 180 around town, 125 to 150 on the highway. Wish the Autometer gauge went to 300.

 

[Sixspeed]

Greg, 1250* is what they say that forged aluminum melts at. But that is only if you sustain that temp. long enuff in the combustion chamber to melt your pistons. Thats why you see guys talk about getting their trucks up to as high 1500* with no harm. Because they don't stay there very long.



Les

 

[Okie-Go]

I saw 1309 on the way to Kerrville at the last rally. It is set to blink at 1250. This was not a mountain for out west standards, but a good hill none the less.

 

[Bob Wagner]

this may help you understand your truck

https://www.turbodieselregister.com/faq.htm

 

[joesoot]

Originally posted by Sixspeed

Greg, 1250* is what they say that forged aluminum melts at. But that is only if you sustain that temp.

I though it was around 1600-1700?

 

[work2muchplay2little]

1300 is the temperature most often quoted for the upper end of the safe limit. I believe this indicates sustained temperatures. Now what sustained means is open for debate, but I believe it to mean that a temperature held long enough to heat the metal components of the combustion chamber to that temperature. I personally have had EGT's near 1700 often, but this is only for 4-5 seconds max, with no apparent damage. Guys who do sled pulls have hit upwards of 2000.

 

[ABailey]

All:



FYI: Melting point of Aluminum is 933. 52K (1712. 34F).

If "forged aluminum" is an alloy with another metal, the

melting point might be different.

 

[DAWG-1]

Cummins....

Cummins specs on sustained exhaust gas temps: 1250 degrees