Where Do EGTs Turn Into $$$

jfoose · #1 12-09-2009, 02:09 PM

Just got my EGT, Boost, and Trans temp gauges in last weekend. My question is, with my pyro situated between cylinders 3 and 4 what does everyone think my safe EGT limit should be? I'm seeing some 1000 to 1200s right now during short WOT bursts, 600-900 normal around town and highway driving??

What is a safe trans temperature?

Thanks.

RAM CR 24V · #2 12-09-2009, 02:11 PM

Same as I'm seeing stock. 1350 and under for an extended period.

Dr. Evil · #3 12-09-2009, 02:24 PM

Ive always thought it was 1250F sustained.

The melting point of aluminum is 1250F. You also have account for measuring error. Id rather err on the side of caution when it comes to a piston meltdown.

jfoose · #4 12-09-2009, 02:29 PM

What are everyones thoughts on the trans temperature? I am using a genos garage acu temp adapter that wraps around the trans line so I'm looking for a baseline. It's running around 130-140 around town, and 120-130 open highway??

cerberus60 · #5 12-09-2009, 06:59 PM

Originally Posted by jfoose

What are everyones thoughts on the trans temperature? I am using a genos garage acu temp adapter that wraps around the trans line so I'm looking for a baseline. It's running around 130-140 around town, and 120-130 open highway??

Cummins claims they tested the +04.5 trucks at 1450 degrees EGT's and they are rated to run there. Keep it at or under 1300 sustained and you should be good. FYI, that is with stock timing. Once you modify the timing all bets are off.

Trans temps in the hot line generally run 160-180, on mine at least. As low as 140 when it gets really cold. Operating temp is 140-230 degrees, if your in that range its good.

The Accu-Temp is not so Accu from what I have seen. Most seem to run 20-30 percent cooler than actual from posted temps.

RAM CR 24V · #6 12-09-2009, 07:02 PM

On days like today, my trans temps never went over 110, and the sensor is in the pan.

2500HeavyDuty · #7 12-09-2009, 07:07 PM

different motor, but dmax are rated for 1350 sustained. they do have aluminum heads, but it dissapates heat very well.

i have burried my pyro on many occasions ive considered getting a 2000* one before cause ive kept it hammerd for a while.

id be more concerned about the wheter the turbo can take it or not not the block.

jfoose · #8 12-09-2009, 08:04 PM

Thanks for all the good information. Does anyone know what the timing advance on the different smarty levels are? I'm not running anything stacked on the smarty, but I also only run level three due to my stocker tranny. Anyone know.

2500HeavyDuty · #9 12-09-2009, 08:09 PM

well bassically adding timing will lower egt's and increase fuel economy. theres alot of playing around though to get it the way you want.

cerberus60 · #10 12-09-2009, 08:10 PM

Originally Posted by wildbill

On days like today, my trans temps never went over 110, and the sensor is in the pan.

Jeez, thats not even av alid comparison considering the day and where you are. "Days like today" indeed!!

Originally Posted by jfoose

Thanks for all the good information. Does anyone know what the timing advance on the different smarty levels are? I'm not running anything stacked on the smarty, but I also only run level three due to my stocker tranny. Anyone know.

I think this is the non-TNT version but it has slipped my mind.

#1 12*

#4 16*

#3 18*

#2 21*

jfoose · #11 12-09-2009, 08:13 PM

Does everyone else run the added timing or should I be running the programming without timing?

cerberus60 · #12 12-09-2009, 08:15 PM

Originally Posted by 2500HeavyDuty

id be more concerned about the wheter the turbo can take it or not not the block.

You had BETTER be concerned if your pistons will take it, forget the turbo. Its gonna toss one soon at those temps.

Be CAREFUL with advanced timing and lots of fuel on the +04.5 trucks, the 3rd event and piston design causes some issues when you push the envelope.

Its not all about EGT's when you throw timing in the equation. It quite possible to melt a piston at under 1300 degrees with the right conditions. You have to be aware of the cylinder pressures and temp create by the timing and duration of the tune or it will not be a good day.

jfoose · #13 12-09-2009, 08:15 PM

I guess I forgot to mention I'm not trying to run what everyone else is running, but is the added timing safe considering my mild mods?

12vcummins96 · #14 12-09-2009, 08:24 PM

the trans temp should run 40 degress lower than your coolant temp

cerberus60 · #15 12-09-2009, 09:51 PM

Originally Posted by hotcummins

the trans temp should run 40 degress lower than your coolant temp

Depends on where you measure it at. Measured in the pan 20-30 degrees less, in the cooler return line 30-40 degrees less, in the hot line with the TC locked 10 degrees less, unlocked TC anywhere from 180-220. There is no hard figure for how much the temp should vary from coolant.

The only range that makes sense is 140-230 degrees because of the variations in use.

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