EGT what is to High

[Tinsmith3]

I was towing this weekend 6000 pounds, and my Pyro was reading 900 to 1150 on the hills.

The truck is stock, and only about 1300 miles on it. When should I start worring about the temp.

 

[ROADWARRIOR]

Assuming your pyro is pre turbo, 1250 is the magic number. I try to keep it under 1200 for long periods.



Dan

 

[Tinsmith3]

Yes the probe is pre turbo.

 

[EEngel]

Temps

Tinsmith3,



The 600 (2004. 5) will run very hot without any mods. I am able to get into the 1300's with the stock motor.



The addition of a new air box will drop it a little, but they are just hot motors.



It is pretty easy to keep it in the 11-1200 range. That's the safe place to be.

 

[InThinAir]

I think all the HO motors run very hot. But what is very hot????



I will say that yesterday I was pulling my heaviest load yet in my 03. Had my slide in Camper loaded and pulling my horses in the trailer. I have a POST turbo probe. I topped a hill just as the guage said 1000 degrees. This was a 4-5 minute haul up the hill. During this hill the guage was staying between 900-950 and then hit the max right at the top.



This is COOLER than my 01 can pull this load. But the 03 is also slower pulling the load. That same hill will put me at 1100 degrees in the 01. With the average staying around 1000 up the entire grade. The 01 is about 100k miles. The 03 is about 6k.



So what is too high??? I don't know the answer because so far I haven't burned anything up. But I get passed by similiarly loaded trucks like ours (Cummins equiped) without guages. So I know that they are pushing harder than me. Are they all melting down their engine. I don't think so, I don't see them pulled over before the top of the hill.



So I say drive it how you feel comfortable, try to get an idea of the EGT temp range for your truck from the guage and drive within your own established limits.



---Doug

 

[Dean Upson]

At 1250* (pre-turbo), I back off.



Dean

 

[CLAYTON]

I'll hold it at 1350 up long hills with no problems (yet) and while racing i'll hit 1500-1600.

 

[miller_wb]

What are we protecting from gettting too hot? My guess is that the exhaust manifold, exhaust ports on the heads, exhaust valves, tops of pistons are a higher temp that what we see on the pyrometer. Is the fear that the turbo will melt down? Or is it other engine parts will melt down?

 

[InThinAir]

The guys that are backing off these engines at 1250 degrees must either live where it is pretty flat or they think these trucks are dogs. I can hit what would be that back out point, empty on my comute home, going with the flow of traffic. Although I gain almost 5000 ft in elevation during my commute home from work, I usually don't worry too much about my EGTs unless I am really weighted down and then I am post turbo up into 1100 degrees sometime for minutes at a time with my 01.



One other quick thing is I saw a post with a link to the Cummins powerspec site and went and looked there. Here is a quote regarding the ISB Engine Protection system. The key item is "intake manifold temperature"







The electronic control system monitors engine speed, oil pressure, coolant temperature, coolant level, fuel temperature, and intake manifold temperature for normal operating conditions. If the limits of normal operation are exceeded, the engine will trigger the red (stop), yellow (warning), or blue (maintenance) lamps, perform the appropriate speed or power de-rate, and log the appropriate fault code.







The way I read that is that they are monitoring the intake and if it is too hot they will derate or throw a code. I didn't think it was doing that, correct me if I am wrong.



---Doug

 

[Guest]

Why do these 600's run so damn hot? My 02 was bombed pretty heavily but I could control the temps and still have a whoop ass ride @ 4600+ft elevation. Im gonna have to twin the thing if I ever go nasty w/ this truck... .

 

[231jasonS]

I can reach 900-1000 empty just merging on the freeway. At speeds of 75-85 it stays at 1000-1100. That is no hill, no load no mods... ..... stock.



Towing my 10k 5th up interstate 80 into colfax this weekend i peaked at 1360 for about 5 seconds, this was at about 60-65 mph. I cant imagine towing stock without guages. I dont know how DC can produce a truck thats runs that hot stock and have non educated drivers not melt their turbos.



Oh and it peaked the boost at 31. 5

 

[JRG]

IMO, the turbo is the thing that gets hot the fastist. The HO has oil jets under the pistons to help keep the internals cool. As the turbo gets to the 1200* range it becomes a heater an inefficient. You would prob blow the turbo firts. JMHO.



PS. I have hit 1450* for very short bursts.



JRG

 

[Tinsmith3]

kax injectors

So tell me, was it worth the $1200. they want for the injectors??

 

[Dean Upson]

Originally posted by InThinAir

The guys that are backing off these engines at 1250 degrees must either live where it is pretty flat or they think these trucks are dogs. I can hit what would be that back out point, empty on my comute home, going with the flow of traffic. Although I gain almost 5000 ft in elevation during my commute home from work, I usually don't worry too much about my EGTs unless I am really weighted down and then I am post turbo up into 1100 degrees sometime for minutes at a time with my 01.



---Doug

It's not the Rockies here, but if you tow on the East Coast you can find some pretty interesting hills around. The little hill coming up out of the Delaware Water Gap on I-84 comes to mind for one. If I am pulling my trailer up a long hill, I would normally start to feather the throttle around 1250, I have no problem pushing it up another 100 degrees, but do not see the point because there would be minimal difference in time it will take to get to the top of the hill by pushing more fuel through it. I will often hit 900*-1000* empty getting up to speed on the on ramp and after having CTD's since 1994, I know these trucks are not dogs .



Dean



edit: I had a 1986 Ford 6. 9 3500, we are talking dog there

 

[Tinsmith3]

I just sold a 83' Ford 6. 9 F250, but it had a Banks Turbo on it.

 

[InThinAir]

So does anyone think that it will de-rate if it gets too hot based on Cummins specs, like the PowerSpec Site says?



---Doug

 

[JRG]

IMO, maybe in stock form, but who knows after its been bombed.



I think the KAX are worth it, but I never drove the truck without them. I ordered it with them to be installed before delevery. I will say that I have met the guy that built them, and he is up on his stuff. Also I like the stealthyness of injectors. No smoke, good economy, and faster than my freinds stock HO. Added a box and WOW.



As far as EGTs... get a pyro FIRST, get a baseline, then you will know what each mod will add. It seems I have seen a few guys get REAL hot, hotter than I would ever go (1600+) I feel the restriction is the turbo, now if you upgrade your turbo and run hot it maybe something else you melt first. Just my opinion.



JRG

 

[Tinsmith3]

I have a Pyro installed now, on a trip to the coast last weekend I was running at around 1100 on the hills. I was pulling my 25' trailer, and most of the time I was around 600 to 900. I plan on having the injectors installed, and also adding a good air box. But as far as a new turbo or other add on's. No!

I'm retired and can't afford to be my own warranty station, so other then that it stays stock.

I am going to get a combo EGT/Boost to install on my pillar, I just need another place to put the trans temp gage.

Now all I need is a PAC Brake, if they ever approve one for the auto.

 

[Bob4x4]

George,By installing aftermarket injectors you are jepardizing your warranty,more fuel= more heat,might as well step up in the turbo department to make a better match



Bob

 

[Tinsmith3]

Hi,

Well not with these, Kax Injectors are approved by Cummin's and Dodge. And installed by the dealer, no warranty problems!