Finally got around to putting a Issopro EGT gauge on my truck (2003) and I'm curious about what is a safe max operating range?

I'm running an old Bully Dog PUP usually in tow or performance mode. I have a 4" upgraded exhaust and a low restriction intake. Upgraded tranny as well....


Thanks

Ron W.

 

on a 03 to early 04 that has only two injection pulses I use 1250 sustained with 1300 max for shift. the 04.5 up has so many variables depending on mods you can not set just one point.

 

1250 it is...

Thanks

Ron W.

 

I always shut down at 1250. If your probe is after the turbo just think about what the temps are before that 100-300 degrees more.

I just like to be extra careful. that's just my 2 cents. I want my truck to last.

 

My truck would hit 1250-1300 stock easily. This is pre-turbo temp. I have a friend that was a Cummins field troubleshooter and he told me that the later trucks the maximum safe sustained egt is 1350.

 

You must realize stock EGTs vs altered timing EGTs lead to very different in cylinder temps. We use EGT becuse it is easy and cost effective, but what you really are trying to monitor is in cylinder temps. After all its your pistons that melt or you cause valve issues when you get it wrong and melt down.

So realize 1300 stock vs 1300 added timing are different. In laymans terms adding timing ussualy leads to lower EGTs but realize all you have done is moved the heat cycle sooner/earlier in the cycle therby reducing EGT yet increasing cylinder temp. Then you add more fuel and it compounds things even more. (again this is very simple terms)

Just know its not apples to apples, and add a saftey factor in a truck with added fuel and timing vs a stock truck. Temp for Temp its not the same.

 

Great info!! This is one thing I didn't understand when I first got into diesels. The above is very layman's as he has noted. but somewhere on here someone has gone into a lot more detail on how stock vs modded EGTs really compare. It's a good read.

 

304 that is why I specifically addressed his 03. a stock 06 can sustain 1600* and have lower peak cylinder temp than a stock 03 at 1250*. if you get rid of the third injection event on the 06 and advance the timing you get a more efficient burn that has a lot lower egt but the peak cylinder is higher, if you try to sustain run the 06 at 1600 after the mod you melt the engine. I think the post you were talking about is one where we were talking about the in-cylinder egr

 

Could be. I know it was pretty detailed and taught me a lot!!

I know my 06 stock will hit 1200 on a particular small mountain pass here in El Paso and with the Smarty on I can not get it over 1000 on the same drive. I just moved the "Location" of the heat.