Research on EGTs?

[Georgia Cracker]

The EGT topic has been heavily discussed, but I am in search of information that smacks of systematic research.



For instance, I know that one reliable source held his truck at 1500* degrees on his truck on a dyno for 10 minutes. Something broke at that point, but it was not the motor or the turbo.



I have heard others say that Cummin puts these engines under some rigorous testing at high EGTs for prolonged periods.



I understand the need to watch EGTs carefully when you are towing, but I am not sure whether brief forays into high EGTs on the street are harmful... that is part of my question.



I have a PowerMaxCR with AFE and stock everything else. I hit 1850* on the Xway in 7/7 at about 90 MPH while accelerating. It stayed at that temperature for about 1 second then when I let off it was down to 700* immediately. In pulls and at the strip, competitors hit 2000* degrees for a few seconds without any problems.



An uneducated perspective (mine) is that hitting any temperature for one or two seconds is not harmful.



Does anyone have any reliable information about the testing that Cummin does on EGTs?

 

[BillGotthelf]

How about over 150 1/4 mile passes with egt's over 1800 on each one. Head is off now and pistons, head and valves all look good. I did see a #6 piston come out of a 12v motor (had bigger injectors and plate) that was towing a 5th wheel up a 7% grade for 8 miles that was melted (looked like somebody welded it) on the top of the piston.

 

[Georgia Cracker]

Bill,



Thanks for the response. It sure puts my mind at ease about the few times I have hit 1700-1800*.

 

[swexlin]

I just installed my DiProcal pyro (pre-turbo) yesterday. My truck is completely stock (see sig. ) My buddy, whose truck is identical to mine, except he has 3:73s, also installed the DiProcal.



On a long flat stretches of road, romping on it, WOT, we were able to achieve 30 lbs of boost, and a max EGT of 1250*.



So, I would imagine that you could get into the "danger zone" on these trucks, stock.



Big exhaust manufacturers aren't going to go out of business anytime soon.

 

[nickleinonen]

i sorta finished installing my gauges today [i didn't finish doing the backlighting, weather was bad] on my 04. 0 in 5th gear slightly uphill run WOT i hit 25psi boost and 1100°f pyro. truck has 5" pipes & stock air intake [minus X baffle & 4" hole in air box]

 

[Matt400]

Originally posted by BillGotthelf

I did see a #6 piston come out of a 12v motor (had bigger injectors and plate) that was towing a 5th wheel up a 7% grade for 8 miles that was melted (looked like somebody welded it) on the top of the piston.

Thats interesting info... I bet allot of others would have liked to know what his EGT's were.