What are safe EGT numbers on a 02 7.3L with the probe in the drivers manifold thanks chris.

 

From what i have read on here 1250 is the highest you want to see. Someone else can elaborate on this.

 

Yep. 1250 max. My personal limit is 1150 continuous pulling a big hill with the trailer.
Mech2161 pegs his guage when he pulls the sled at events, but that's only for the few seconds that it takes to pull the sled down the track.

 

1250 is the magic number with the pre turbo EGT probe, you can go above it but for only short bursts - no extended periods.

 

We talk about the magic number often, and I feel I should mention that this is under ideal conditions. If your oil has been in there a while, I would consider lowering that number considerably as the oil is the only thing keeping that turbo from destroying itself. Just a thought.

 

Good point!

 

i hate to go off on a rant-like post, but i feel that many people are misguided when talking about EGT temps and hurting the turbo. don't take this as a rant either, but im just saying that people are worried about hurting their turbo. the fact that the exhaust manifold is more accurate for an accurate EGT reading, is because it is closer to the parts you want to watch the temperature of, the pistons in particular. they are forged aluminum, and pure aluminum has a melting point of somewhere around 1220*. sure the pistons will not start to melt at 1220* EGT, due to other metals in the piston, cooling from the fresh intake charge, cooling from an oil jet under the piston, and also from the cooling system in the water jackets. if we were monitoring temperatures of the turbocharger, we would have the EGT sensor post turbine in the downpipe. the turbocharger's turbine wheel is made from inconel and tungsten among other exotic metals, and can withstand temps much higher than an aluminum piston will.

also prolonged temps near 1200* can't be good, as the piston becomes "heat-soaked" and the entire piston becomes close to the same temperature, not just the crown of the piston. the piston begins to expand, but the cylinder doesn't. tolerances get tighter and eventually the engine will begin to lock up if the pistons become hot enough. however, i think that would ONLY have the possibility of happening if a cooling oil jet for a cylinder wasn't working.

 

Very good rant-like post Kris. But for the same reason we watch our egt temps before shutting the truck down, I say your oil has to be up to the task or it will lead to turbo failure at prolonged high temps. JMO.

I am not disputing your post, just expanding on mine.

 

I guess I was one of the less educated, I always thought it would cook your turbo...slowly trying to aquire some knowledge

 

Since I feel like fueling the fire a bit, have a looksee at this post I made this past weekend.

Keep in mind that there is no real scientific data here and that what I see is what I see. I don't condone disregarding the EGT, however....I now am not in a super high-speed rush to go get another pyrometer.

https://www.ford-trucks.com/forums/5...-confused.html

Cody

 

The reason i ask is because i know that temps above 1200 are not good, i just got my chip back from getting reprogramed and went for a short drive i got out on the road put it about 1/2 - 3/4 throtle for about 3-4 seconds and my guage was allready starting to pass 1200 so i let off, thought that was a little quick to hit that temp. kind of funny even at stock level my guage showed 1000 - 1100 when i pinned it for about 5 seconds.

 

To expand a little more, the reason we watch the EGT's on shutdown is so that hot oil doesn't cake onto the turbo bearings leading to premature failure. Over time this will continue to leave deposits. This is one reason that I run synthetic oil, since synthetics cook at a higher temp than regular dino oil, and leave less deposits.

As far as engine and EGT's, yes 1250 would be as far as I would go for any long period of time, and I've done that a few times towing (altitude does crazy things for EGT's). As for going over, I've done that as well out at the race track. It's not unusual for me to peg 1400 on the pyro at the end of a run.

Big Gun, I think your EGT's are spiking a little faster than they should. If you already have upgraded your exhaust, I'd start looking at a possible boost leak somewhere, or an exhaust leak at the manifolds or up-pipe. Any leak like this will cause your EGT's to go out of control.

 

Stock exhaust for right now, but i still found it funny it ran 1000 - 1100 with the chip in the stock position. thanks for the replys.

 

Which chip are you running? What other mods do you have? Without knowing your exact setup I believe it is safe to say you have just entered the world of "one mod leads to another". You will see a difference in your EGT's once you change to a more free flowing exhaust and change the air intake. With the higher HP settings EGT's go up pretty quick. Down the road (CHristmas & birthday presents!!) you might want to consider an aftermarket Intercooler (i.e. Diesel Innovations), or the 6.0 Intercooler (cheaper on the wallet). Also the van turbo and larger housing dropped my EGT's.

 

There's the problem. Even stock setting you'll see that 1100 temp is normal.