Engine/Transmission (1998.5 - 2002) EGTs to high!

[SCox]

Went and picked up my 15k fifth wheel. Place was in WV, alot of 9-11% grades @ 2000 to 3000 ft. Had a heck of a time keeping my egts below 1300. (Injectors still not installed). Had to keep the tst on 3-4 and foot out of it.

- are the injectors going to make this problem worse

- what can I do to cool the temps down. . will 4" exhaust help? I tow 2-3 times a month while racing, so towing is the most important aspect of the mods.



Any ideas or thoughts are appreciated guys,



Thanks

SteveOo.

 

[Bob Wagner]

use the injectors for towing and keep the box off



4" exhaust will help.



I tow a 30' 10k+ 5er with just DD3's and the box off, it works great and the injectors dont push the VP44 like the box does.

 

[OTRPU]

Having a similar problem. Have heard opening the exhaust will help. I'll let you know if it really does or not, Reliance Truck & Auto is installing mine today. If this don't do it I guess I'm looking at a larger turbo. Course, you can always just go slower.

#ad


Tow Safe,

Steve J.

 

[IWeiny]

What!!! Go Slower!!!

Now you're just talking KRAZY!!!!

 

[CFAR]

Are you talking about the II's in your signature?

You will probably still be pretty hot with just injectors?

I have the same problem, high elevations don't help, it sucks not being able to go up those hills as fast as you want doesn't it.



Bigger turbo?

 

[RHARVEY]

From the signatures that I am seeing... I dont see anything about the turbo. There is a lot of fuel going in but you are still from what I am seeing running stock chargers.

My wifes 2k was built for towing a 30' fifth wheel. I have listed the items that the orginal owner done to it.



Edge EZ

DD II's

PDR HX35/12cm (he lived @ 5000' elevation)

BHAF

Carter push pump

DTT transmission w/ smart controller

Pac Brake



The truck was dyno'd @353hp to the ground. . and would pull his trailer with NO problems with EGT's. .



Rick

 

[RustyJC]

Originally posted by OTRPU

Having a similar problem. Have heard opening the exhaust will help. I'll let you know if it really does or not, Reliance Truck & Auto is installing mine today. If this don't do it I guess I'm looking at a larger turbo.

Steve,



I'm serious as a heart attack. Since you already have an HX35-W, a boost elbow will do wonders for EGT's if, as I believe you've said before, you're running stock boost pressures. I would certainly go that route before I changed out a turbo. Besides, a new turbo won't help that much if it can't run any more than stock boost, and that requires a boost fooler (which you already have if you have an Edge EZ per your signature) to keep from throwing codes.



Rusty

 

[OTRPU]

Hi Rusty, I talked with Dan, he says I already got the fooler and elbow. I'm running 36 lbs boost without trying very hard with a load. I don't normally tow anything over 65 MPH. Had a situation arrise where I didn't have any tail lights on the trailer so was trying to get from GJ Colo to Richfield Flying J before sundown. So I ran 75 & 80. Didn't make it. . . but didn't get caught. Had to wait till 8:00 the next day to deliver in Salt Lake City cause I didn't have lighting. But pushing it over 60 resulted in 1,500* + EGTs. Had to drop out of OD and run 60 or less on the severe grades to keep it managable.



Thanks,

Steve J.

 

[RustyJC]

OK, I stand corrected.



Rusty

 

[KLockliear]

The ETH trucks notoriously run hot stock, then you have a non-timing major fueling box... it should run hot with that setup. Start with an exhaust. When you do the 2's, you'll need a turbo if you want to continue to use the box.

 

[OTRPU]

God Rusty, I haven't heard that statement since I was in the Navy. . . bout hunnert years ago.



Thanks again,

Steve J.

 

[jrandol]

Originally posted by OTRPU

Hi Rusty, I talked with Dan, he says I already got the fooler and elbow. I'm running 36 lbs boost without trying very hard with a load. I don't normally tow anything over 65 MPH. Had a situation arrise where I didn't have any tail lights on the trailer so was trying to get from GJ Colo to Richfield Flying J before sundown. So I ran 75 & 80. Didn't make it. . . but didn't get caught. Had to wait till 8:00 the next day to deliver in Salt Lake City cause I didn't have lighting. But pushing it over 60 resulted in 1,500* + EGTs. Had to drop out of OD and run 60 or less on the severe grades to keep it managable.



Thanks,

Steve J.

Dang, OTRPU, your poor turbo must be have melted by now!! Guess it just goes to show how tough these CTD's really are!!



Jeff

 

[OTRPU]

Wasn't the dang Turbo I wasa worrin about, (should I be?), long as some of those climbs were I was afraid I'd turn the pistons to liquid. DOC says I'll probably blow a head gasket affore that happens, this true?



Cheers,

Steve J.

 

[jrandol]

Originally posted by OTRPU

Wasn't the dang Turbo I wasa worrin about, (should I be?), long as some of those climbs were I was afraid I'd turn the pistons to liquid. DOC says I'll probably blow a head gasket affore that happens, this true?



Cheers,

Steve J.

Well your turbo will say bye bye but your right, those pistons will be liquid too. Turbo: $650... ..... Rebuild on a CTD: OUCH!!



Those temps will get ya!! I am fighting the same battle right now empty



Jeff

 

[LSMITH]

Originally posted by Bob Wagner

use the injectors for towing and keep the box off



4" exhaust will help.



I tow a 30' 10k+ 5er with just DD3's and the box off, it works great and the injectors dont push the VP44 like the box does.

It is not that complicated guys. Bob is right ^^^^.

 

[Cliffman]

I'm pullen 6% grades, 60mph, 1300 egt's, box on 2 at Sea level. good enough! Check sig Oh yah 130k on the speedo.

 

[rweis]

Isn't the concept to basically "over-air" to keep it all together smoothly?



Lots and lots of air then add fuel? Watch the temps to see if you have too much fuel?



Air in and air out. Then rpm's up (2500) to really move it through as fast as you can.



I liken them to a turbine engine. Good air good temps, not enough air high temps, poor air temps melt it.



XX fuel + xx air at 2500 rpms temp ok,

XX fuel (same) + xx (minus because of lower rpms) air at 2000 rpms temps not ok.



Keith - could you comment on the "non timing box" please. Is a EZ, Comp, who ever elses box, a timing box? Do you have to have the pump wire to have a timing box?



Bob Weis

 

[RustyJC]

Originally posted by rweis

Isn't the concept to basically "over-air" to keep it all together smoothly?



Lots and lots of air then add fuel? Watch the temps to see if you have too much fuel?

Bob,



That's certainly the route I've taken. My current mods (see signature) have dropped maximum pre-turbo EGT's from 1300 degF @ 22 PSIG boost to 1100 degF @ 30 PSIG boost - these temps when towing our 13,500 lb 36' 5th wheel RV. Since I have some thermal "wiggle room" in my present "over-aired" configuration, I have a set of DD2's sitting in the garage ready to go in this weekend. If that brings maximum EGT's back to the 1250-1300 degF range of the stock truck and adds the BHP it should, I'll be one happy camper (literally). Oo. If I overfuel it, I'll probably have to look at a hybrid HX35 type turbocharger upgrade (I have a turbo-mounted exhaust brake).



Rusty

 

[Car_nut57]

4" exhaust will help and if you need more use an Aeroturbine to help lower EGTs even further. We have 4" systems available in aluminzed steel and Banks Monster Exhaust in stainless steel.

 

[isb360]

DD vs TST

I'm not clear from reading the thread: The DD UFM box alters timing AND pump duty cycle but the TST PM3 only alters duty cycle and not timing?



I'd appreciate a clearer explanation from anyone "in the know". I'm swaying between a DDUFM and a TST PM3 box and am looking for advantanges/disadvantages, etc.



My planned bombs are:

gauges

DD UFM or TST PM3

DDII injectors

more air in, more air out.



Thanks

Tim