Engine/Transmission (1998.5 - 2002) What are you EGT's like ?

[csutton7]

1300* is the so called magic #--over this for extended periods could mean trouble--I've touched 1740* many times during sled pulls and just flooring it---basically if you keep your 1300* & over temps for under 10-15 seconds you should have no problem--the higher the temps and the longer you keep them there the chance for something going wrong increases--but for 1/4 mile drags and sled pulling so far so good---chris

 

[mules4me]

I have a new 02 HO 6spd and I can get 1200 real easy empty on a short 6% grade. I have hit 1450 pulling my 24ft 5er. I always back out of it when it hits these numbers. I am completely stock except for guages.

 

[KatDiesel]

Should have made a catagory = "Pegged"



My gauge only goes to 1600°



Depending on which turbo I have on the truck I can peg it if I want to... . (racing and dynoing).

 

[mopars1]

When I first purchased my current truck I put the gauges in within a few days. I could hit 1300 stock. At this time and with the mods I very seldom see 1300.

 

[carson6]

1500+ on my bank's gauge only twice!

it will go right up to 1000 in town with a heavy foot and higher just keeping it floored... how do I keep it cooler???biger exaust... two piece manifold... bigger turbo??

 

[Rob Thomas]

Re: 1500+ on my bank's gauge only twice!

Originally posted by carson6

it will go right up to 1000 in town with a heavy foot and higher just keeping it floored... how do I keep it cooler???biger exaust... two piece manifold... bigger turbo??

Yea, a turbo would help fer sure, also a BHAF is good fer about -100*.



Later, Rob

 

[Joseph Donnelly]

I spent the last year on air system upgrades, not fueling. Finally got the egt's down to the bottom "button" of your survey Oo.

 

[jimnance]

Although my pre-turbo EGT never goes above 1100 degrees I suspect that as high as 1500 degrees could be sustained if all other temps are in the green. I'll tell you why I think this.



I operate an aircraft with a turbocharged aircooled 310 HP engine. Being all aluminum except for the cylinder barrels, crank, cam, etc. these engines require great care with respect to operating temps. Surprisingly, the allowable values given the aluminum heads are quite high:



Cylinder head temp - 460 degrees max. Normal 350-380 degrees

Tubine inlet temperature (pre-turbo EGT) - 1650 degrees max



Normal operating EGT runs about 1500 degrees.



Anything above 1650 degrees and you are at the point where the metal begins to literally sag. You don't want to go there.



I realize there are some differences between a Turbo charged liquid cooled diesel and a gasoline powered aircraft engine, but the basic metalurgy of the turbocahrgers is the same.



Personally, I subscribe to the theory that cooler is better. Engine components will last longer. If you want to get 300,000 miles out of your Cummins I would suggest that the 1250 degree EGT limit is a safe conservative limit.

 

[Partyat33]

T T T

 

[JJW_ND]

Tell us what works!

Joe:



You care to share what has helped and what has not.



I notice a big difference in Towing EGT's and running empty racing EGT's. Towing are much lower because if never have to run over 2400 RPMs in 4th and 5th.



But racing empty I like many here can peg a 1600 degree EGT gauge once RPMs go over 2800. The GSK kit has raised the previsous EGT high because the extra RPMs are all HOT.



jjw

 

[carson6]

what is the next step..

... and don't say back off the throttle!(which is what i do)would a bigger exaust work?there is a 12% grade on the way up to these mountian's and it's not hard to get my egt's up there. What's next

 

[csutton7]

carson6----you need a turbo--the B1 from www.performancediesel.net or one of Piers' turbos... chris

 

[Bigsaint]

I very seldom see anything above 1200-1250. Even with the TST on KILL, maybe 1300. Guess that I'm not staying in it long enough, but, at that point, I'm going so damn fast I have to let off .



Scott W.

 

[_MACKIN]

I would suspect better breathing, and exhaling ......

Resident ALLOY checking in ... .....



I'm usually stay within highs of under 1200*under carpet mashing conditions... ...



I myself have only seen a 1300* spike climbing a decent grade ... ... . Modified airbox,JUICE full blast, what else, still stock exhaust ..... My assumption is it will cool off some, once I free flow (or all most) my exhaust..... I'd like to stay within 1200* limit if possible, under duress ... ... All though when testing of the D-max a sustained 1400* temp was felt to be in the comfort zone ... ..... Well, Well, Well ... ... Some like it HOT ... .....



TALLY HOE ... ... .



MAC

 

[The patriot]

sorry, I didnt make the cut either....

These are post turbo numbers:

After the 370 injectors, 900-950 tops.

Adjusted wastegate to 39 psi, I cant get it past 700 now!!!

When I spoke to Piers, he said to add about 400 to these figures to get the (ballpark)pre turbo number.

Eric



PS What Scott said. I need a whole lotta open road to get these numbers. I usuially use the Parkway for "tests".