Max Sustained EGT

[RodneyNichols]

what would be the max EGT to pull at all day long?

 

[lmills]

typical rule of thumb is 1250* pre turbo for extended times

 

[yycguy]

so is the rule 350 less for post turbo? also how about trans temp?

Thanks

 

[KLockliear]

There is no rule-of-thumb for post turbo that is safe. They vary too much. Put it pre-turbo.

 

[RodneyNichols]

I'm pre-turbo

I was pulling an 24' v-nose enclosed trailor empty yesterday and I have a BD monitor box, Edge EZ (level 6) AFE drop in, and stock exhaust and when I hit the hills at 80mph, I would be hitting 1250 to 1300 degs. The max I hit yesterday was 1313 Is this normal? What will happen when I hook onto my 5th wheel?



I won't beable to keep up with my buddies that own Powerstroke/Duramax if I have to let off like that?



Now what do I have to do put an exhaust system on?

 

[BPINE]

Originally posted by KLockliear

There is no rule-of-thumb for post turbo that is safe. They vary too much. Put it pre-turbo.

Very good advice.



Also running at 1300 for extended periods might not be such a good idea, it leaves you no room for error. I used to pull at 1300 for however long it took to get to the top of a hill but one of my friends burnt a piston doing just that so I think 1200 or so might be a better #.

 

[lmills]

Originally posted by cummins-man

I was pulling an 24' v-nose enclosed trailor empty yesterday and I have a BD monitor box, Edge EZ (level 6) AFE drop in, and stock exhaust and when I hit the hills at 80mph, I would be hitting 1250 to 1300 degs. The max I hit yesterday was 1313 Is this normal? What will happen when I hook onto my 5th wheel?



I won't beable to keep up with my buddies that own Powerstroke/Duramax if I have to let off like that?



Now what do I have to do put an exhaust system on?

Level 6 on the EZ is probably not helping matters. Try using a less agressive setting when towing. Remember there is only about a 10 HP increase from level 5 to level 6

 

[RodneyNichols]

Level 6 on the EZ is probably not helping matters. Try using a less agressive setting

10 hp thats it ????? It sure feels more then that.



How much more power will that 48RE hold without messing with the transmission? I would like to do some injectors but I DON'T want to put money into the transmission. Does anyone have any suggestions?



With this being the first summer pulling my 5th wheel with the 03 dodge I want to make sure my Powerstroke and Duramax buddies don't get the best of me.

 

[BCarmicle]

I don't know the exact amount the 48RE will hold with no problems, but I've heard with EZ turned all the way up is about the limits. But also heard it could hold 400hp. My suggestion would be to leave the injectors out unless you are goin to do some transmission upgrade, especially since you are goin to be towing.



Brandon

 

[robertyoke]

my 03 pullin my 5-er up vail pass would hit 1300~1350 when it was stock. my 98. 5 would be at 1400 up all the passes when it was pullin heavy and it was fine when I sold it at 100k.

 

[RodneyNichols]

So bacically If I'm pulling a heavy load all day long keep the EGT's under 1250????????

 

[CLAYTON]

I've hit 1425 breifly pulling a long hill going 85 with a 10k 5th wheel testing the truck out. That was before the intake so I am excited to see how it will effect it.

 

[rashwor]

Yes, cummins-man.

That is what I would recommend. For safety sake, I try to keep my '99 1200* or below which has not bee a problem for me. This gives me a little room for error on the hot side with the gauge.



Keep in mind that the EGT placed pre-turbo is a average of the EGT coming out of the 6 cylinders. It is not uncommon for #6 to be considerably hotter than what you see on your pyro when it is placed in the middle of the exhaust manifold, but before the turbo.



Never run post turbo pyro if you push the truck at all. These new trucks run hotter and I expect we will see some post turbo people melting pistons in the new trucks before too long.



JMO; worth less than $0. 02, no cash value, void where prohibited.

 

[InThinAir]

Melting piston! I think that whether you have the probe mounted pre or post doesn't have anything to do with melting your pistons. It is just more reponsive in the pre location, pre location guys can ignore the numbers just like post guys could.



I have maintained a 1100 post turbo temp for 10 minutes. I am approaching 100k and maybe I have done damage to my 01, but the last emission test I had, the dyno read that I have 550 ft/lbs of torque with a mostly stock motor. just a BHAF and 4" exhaust at 6000ft of elevation.



I think that either location is acceptable for any truck it is just a personal preference. As I have said before I think that a pre probe leaves you open for the more likely damage during shut downs. A lot of times your guage says 300 but the turbo is holding the heat a little longer and is 400 post turbo, lot of metal in that turbo housing.



The guage is a monitoring tool, doesn't replace common sense, at 1400 pre or 1100 post or whatever temp you know when you are pushing and you know what the consequences will be.



---Doug

 

[Gary - K7GLD]

IF you worry or think yer Ford/GM buddies will laff if they pass ya on a grade, what do ya think they'll do when you scatter yer engine on the same hill cuz of high EGT?

 

[Crunch]

Re: Yes, cummins-man.

Originally posted by rashwor

Keep in mind that the EGT placed pre-turbo is a average of the EGT coming out of the 6 cylinders. It is not uncommon for #6 to be considerably hotter than what you see on your pyro when it is placed in the middle of the exhaust manifold, but before the turbo.



Never run post turbo pyro if you push the truck at all. These new trucks run hotter and I expect we will see some post turbo people melting pistons in the new trucks before too long.

Would it be a waste of time and money to measure EGTs at both locations, pre and post, and can good information be obtained by doing that? Or is there no value in post-turbo measurements at all?

 

[SRadke]

There is very little value in post turbo temp measurements.



A good intake system with large filter will usually drop egt's a fair bit on a bombed engine.



-Scott

 

[rashwor]

I can't say on post turbo. I have only run pre turbo. I like being as close to the heat source as possible.

 

[FJfonda]

I just installed my guages in the new truck and empty, WOT, uphill my pre turbo reading is 1250 deg !!!!! This is bone stock. The guage is a DiProcal.

FYI -- the post turbo installation is usefull in determing turbo cool down times as the reading is greatly affected by the residual heat in the turbo. Of course, this is why this position is not good for peak combustion temp measurements as the turbo also acts like a great big heat sink . . the reason for the 2-400 deg delta pre-post turbo. Towing hard will heat the turbo up quite a bit and this requires sufficient idling time to cool down so the oil doesn't cook in the bearings and coke the surfaces. On my '99 this took 5-7 minutes of idling after pulling the big hill by my house. Pre turbo EGT measurements would not have shown this.

I plan on adding a second T/C post turbo and switch between the two with an underhood relay (DPDT) and a switch by the guage.

Will be towing the boat again this weekend with the new guages..... I'm curious to see if the EGT's go much over the 1250 empty reading.

 

[bpenrod]

I would be interested in how you hook up the relay and switch. I had my probe post turbo and moved it pre-turbo so i have the post turbo fitting. Should be prety easy to mount another probe if I get the switch wiring correct.