What's Too Toasty?.

[evldsl]

I would like to know what is too hot egt wise. I have had my truck up to 1000 egt while speeding up and around 800 while towing around 70-75 miles per hour. I have a attitude and juice along with a 4-5" exhaust and afe intake. 2004. 5 swb,4x4,325/600 cummins,auto. The juice is on setting #2 but rarely above the #3 setting. I was told never around 1300 egt.

 

[650mphDiesel]

I too tried to find a "red line" EGT. Never got any hard numbers, just advice to "keep er under 1300" When I asked how folks arrived at that number no one could give me any answers. I also contacted cummins and they could not give me an answer either. I guess when you start melting things you know you've been running too hot.

 

[Hawkeye 04]

I've touched 1600 (pre turbo) a few time but only for a few seconds. No damage. . Seroius sled pullers will bury the needle on any given pull and don't seem to have alot of problems. However, maximum SUSTAINED egt I personally wouldn't allow over 1350*. It's the continuous high temps that start wearing away at your engine.

 

[J&LRam]

My stock '03 HO runs 1000 degrees on long steep uphill pulls. Probe in front of number three and towing 11000 lb 5er... ... ... ... ... JIM

 

[nickleinonen]

My stock '03 HO runs 1000 degrees on long steep uphill pulls

my 04 will do ±1100°f when on the throttle real hard [ie, racing] fueling/timing/duration is stock...

 

[Hohn]

If you have an 04. 5 or later, the truck will handle 1450 all day. Inconel valves, Cobalt seats-- these are expensive and are done for a reason. The ability to sustain higher EGT is part of the path to lower emissions.



JLH

 

[jwilliams3]

You sound like Don M word for word, Justin.



I think is was the "1450 all day long thing".

 

[CLAYTON]

I'll try to keep in under 1350 when towing... it'll go higher from time to time

 

[Hohn]

That's because they ARE the words of Don M.



Since he can't post on here, I like to be his mini-me





jlh

 

[jwduke]

I didn't think you wanted to go over 1200 degrees????

 

[jwilliams3]

MINI DON!! :-laf

 

[JVolpe]

I have seen 1500* briefly on my 04. 5 600 when at the strip or on sustained WOT with certain configurations. I try not to go above 1300* for any extended period. Normal driving, including on ramp acceleration to 75mph never really see over 1250*. Cruising at 80mph on realatively flat terrain usually is 650*-750*.

 

[dragrcr1005]

1500 and did not die!!

i once hit over 1500(pre-turbo) running about 110mph crushing a new eclipse down the highway for at least a few minutes. (not so smart) no damage though!!!

 

[TX Gooseneck]

I've shot past 1600*a few times. I have my TST set @ 1480* which will usually spike around 1540* and float back down.

 

[Sarge]

Towing with the 5ver, I will pull between 1400* and 1450* on some of the longer, steeper grades. When I first bought the 04. 5, I was at a Rattlin Ram truck rally at Foothill Dodge listening to John Holmes from Carson Dodge, who does the "Diesel 101" seminar. In that seminar I asked what the safe EGT's were for the hotter running common rail engines. John said that DC was recommending 1450* for safe running temp.



I have used that as a guide for about 20,000 miles of towing with no issues at all. Hohn is right, the hotter temps figure into the emissions formula. That is one of the reasons why Cummins increased the thickness of the block in critical areas, and spent money on hi temp components. Sarge

 

[JApol]

I did a bunch of research before buying my CTD as this is the first diesel engine i have ver ran other than my dads tractor.

I read that around 1250* this is close to the temp when the metal in the turbine blades starts to become soft. With the speed that the turbo is spinning centrifugal forces are tremendous. Is the metal is just a little pliable it may start to warp and straighten causing the turbine to become unbalanced which will spell eventual and destructive dooom for the turbo.

 

[Kornstad]

Talked to a Cummins Rep and he indicated no more than 1100 degrees F. aluminum begins to melt @ 1200 Degress F. Just food for thought

 

[Scrappy]

that is right BUT you also have to take airflow into the equation, the air moving in will cool the parts some. I have seen 1600+deg. too many times to count. Mark @ TST said he tested one of his trucks on the dyno @ 1500 degrees for 30 minutes ( until it blew a I/C boot.

 

[JCleary]

You're not going to hurt anything by hitting 1300°, or even sustaining 1300°.



I have my TST set to defuel at 1400°. It will hit that temp only when I'm goofing around, and not long enough to do any damage.



It's the long grades at high temps that are going to do damage, but as others have said, the HPCR can withstand higher temps (600's and 610's, that is).

 

[Kornstad]

1100 degrees F or the price of a new motor & part? Whats the cheapest insurance!!!!!!!!!!!!!!!!!!!!!!!!