egt how hi is to high?

[Mhannink]

well something i have come to learn first off is that the pistons are not the first thing to go. you'll burn the exhaust valves first. as far as what temp is safe the rule of thumb has always been 1200. now ive run trucks to 1600+ and held them there for several minutes pulling loads i have yet to have problem from too much heat. however i dont recomend it. ive done it, but dont like to, its just plain too hot. i like under 1200 but 1350 is ok.

 

[JHMiller]

I followed the directions and pictures and installed on #3. Understand I never hold the throttle, when the alarm sounds (1400) I shift or back off, still I'm concerned. The Att has a stock setting, supposedly, today I'm going to see what happens in that setting. The thermocouple came with the Edge, but I have no idea as to the accuracy. Anyone know what the voltage should be for various temps? I have a high ohms/volt fluke and could run some leads to monitor, it records.

Here's the weird of it. Before Dodge reflashed my ECM the truck ran stronger stock than with the Edge on #4, got better mileage, etc,etc. You may recall reading my story and that's one reason for the Edge, to try and get my performance back. Reason #2, to get back to 21. 4 mpg, haven't got there yet. A solid 20+ mpg on summer fuel though, over 18. 5 on winter fuel on #4.

I almost went with the Smarty, do you know what they are doing to control EGT's and still power on, the reported and observed smoke changed my mind. Has Smarty got control of the smoke issue? Tks in advance... John

 

[mikeshauling]

I could get 1500 stock, i have heard that 06 and newer can do 1600 for a little bit and be fine.

 

[mhuggler]

Max sustained pre-turbo egt is 1350. Anything over 1400 is allowed for 10 seconds. This is as per Cummins. Caterpillar allows up to 1200 post turbo egt.

 

[CToney]

Smarty does now have smoke under control. With the new REVO Software you can adjust the torque management and timing on the JR and rail pressure, aftermarket turbo, and speed limiter on the SR (I might have missed one). I reduced my torque management to smoke less in the summer and to try and save tires and not be as snappy on gravel roads. They made these changes as all trucks are a little different and most trucks are not completely stock. The latest software also has the Power on Demand adjustability as well. I loaded default timing and torque 3 (slightly less than default) and Performance program at level 80. I hope this answers your questions.

 

[mikeshauling]

Max sustained pre-turbo egt is 1350. Anything over 1400 is allowed for 10 seconds. This is as per Cummins. Caterpillar allows up to 1200 post turbo egt.

I believe its higher than that on 04. 5 and up. Stock, i pulled some big hills 1500 for a few miles, these pistons were made a little different for the third injection event and the heat that it creates. IIRC

 

[mhuggler]

I believe its higher than that on 04. 5 and up. Stock, i pulled some big hills 1500 for a few miles, these pistons were made a little different for the third injection event and the heat that it creates. IIRC

That may very well be possible. The spec. I gave was for engines before the common rail came out.

 

[osiris]

I thought I read in one of the TDRs that the 05-07 5. 9s were good to sustain 1450 but I have already melted my engine once I wont let it iget over around 1400 or so

 

[KKaminski]

Along the same lines as this thread, I have a stock 2500 w/ CTD and was thinking of putting guages in place. How about these?



Auto Meter Phantom Series Complete Gauge Kit (Boost, Pyro, Trans. ) 7098





List Price: $421. 59

Our Price: $316. 19

You Save: 25%

Manufacturer: Auto Meter

Item Number: AM7098





Application: 03-07 Dodge 5. 9L Cummins

Quantity:

 

[jjdiesel]

In this discussion, duration is everything. As has been mentioned, sustained EGT's are what we really need to pay attention to. A quick spike to 14,15,1600 is usually o. k. Saying that,... there are other considerations, where is your pyrometer probe located? How fast is it's reaction? Some have been noted to take up to 5 seconds... add that into the equation. With most dropped valve-seats, it seems to be an EGT related event... lot's to contemplate.

 

[mhuggler]

In this discussion, duration is everything. As has been mentioned, sustained EGT's are what we really need to pay attention to. A quick spike to 14,15,1600 is usually o. k. Saying that,... there are other considerations, where is your pyrometer probe located? How fast is it's reaction? Some have been noted to take up to 5 seconds... add that into the equation. With most dropped valve-seats, it seems to be an EGT related event... lot's to contemplate.

If sustained egts are what is important(and they are), why is it so imperative to have a lightning fast reacting pyrometer?

 

[cerberusiam]

Max sustained pre-turbo egt is 1350. Anything over 1400 is allowed for 10 seconds. This is as per Cummins. Caterpillar allows up to 1200 post turbo egt.

That would be for the pre-04. 5 engines, the 600 series are rated at 1450 degrees per Cummins.



I still think the Piers Ranking is the best available:



1250 - all day long



1300 to 1500 - 3 minutes out of 5



1500 to 1800 - 2 minutes out of 5



1800 plus - 60 seconds to Chernobyl





Hasn't failed yet from 1st gen to 3rd gen.

 

[CToney]

Get the phantom 2 guages as they are led lit.

 

[jjdiesel]

If sustained egts are what is important(and they are), why is it so imperative to have a lightning fast reacting pyrometer?

Actually, I didn't say one has to have a lightning fast reacting pyrometer, nor did I imply such. I simply said "add it to the equation. " If someone is pulling a long grade and is showing 1500 on the gauge (example), how long has it actually been 1500? Depends on the reaction time... this was a topic some time ago here. Some on here seem to feel that 10 or 15 seconds at such a temp is harmless, and maybe it is... . but it might actually be more like 15 or 20 seconds... . or worse!! Like I said, just something to contemplate.