Engine/Transmission (1998.5 - 2002) 2002 Boost & EGT

[DWest]

So far I've added an Edge EZ, K& N filter and 275 RV injectors to my 2002. Boost tops out at 20 lbs and EGT runs at 750 to 800 degees post turbo pulling a 5000 lb trailor at 70 mph on level ground. The EGT seems consistant with other post here but the boost seems a little on the low side. Does not seem to be a problem as I get no smoke on hard throttle and there is plenty of power to get up and go. The trip mileage to the shop before the injectors was 20. 3 and on the way home it was 21. 5. Have not run a long hill yet to see how high the EGT will go and am wondering what are the safe temps post turbo for this motor?

 

[KatDiesel]

Have you touched the turbo wastegate at all? You have the auto... therefore you can't swap out the "elbow" like some people can. You'll have to use a spring and or a turnbuckle to slow the wastegate down. some people disable it.



Basically you have "defeated" the computer on allowing more boost but you still have to address the "physcal" side of it... . the wastegate is opening and dumping at stock settings... ... so all your extra boost is going out the wastegate.



Once you address the physical side of it you'll see 27 to 30lbs on most ocasions... . which in turn will lower your EGT's.



Do a search on HY35 and or turnbuckle.



On your fuel milage, is that using the overhead computer or is that calculating by hand? With your mods your overhead computer will be wrong. You flowing more fuel then the computer "sees".



Safe EGT? Well post turbo everyone generally adds 300° to the post turbo reading..... but in some cause thats just a guess... ... and is sometimes not "enough". Again use the search feature and you'll find some info regarding this, and make your opinion.

 

[Sky]

So the 2002's have the hy turbo??? And they are hardlined? I thought it was just a 2001 thing?

 

[DWest]

diesel: As you know I can't use the boost elbow on my 2002 and this truck is still pretty new to me so it's all a learning experience for me. The mileage was on the computer so I thought it would be accurate to compare with out the injectors. Will try a long run this weekend and post actual trip mileage.

 

[KatDiesel]

Originally posted by Sky

I thought it was just a 2001 thing?

Nope!



They (Dodge and or Cummins) like that turbo so much I believe its the only turbo available on the 03's! Kinda sucks don't it?

 

[KatDiesel]

Originally posted by DWest

As you know I can't use the boost elbow on my 2002 and this truck is still pretty new to me so it's all a learning experience for me. The mileage was on the computer so I thought it would be accurate to compare with out the injectors. Will try a long run this weekend and post actual trip mileage.

If you have trouble using the search feature, lemmie know. Theres a couple of posts with pictures that show what I am refering to on the wastegate thing.



Don't worry bout it, we all had to learn sometime.



It won't be off as much without injectors. But it will still be inaacurate because of the addtional fuel flow. After the injectors your flowing even more fuel then the computer "sees"... . my overhead reads 19. 5 to 20mpg most of the time... . yet my actual milage is 16. 0 to 16. 5 mpg. That was better then I was getting when it was stock tho

 

[Sky]

So let me get this straight. In 2001 they used the hy35 and in 2001. 5 they used the hx35 and in 2002 they went back to hy35? Unbelievable... ... ... ... ..... and they are keeping it for 2003?

 

[KatDiesel]

Originally posted by Sky

So let me get this straight. In 2001 they used the hy35 and in 2001. 5 they used the hx35 and in 2002 they went back to hy35? Unbelievable... ... ... ... ..... and they are keeping it for 2003?

01. 5 Autos have the HY35 as well... ... and yes its my understanding that is the turbo that will be on the 03's.

 

[Jeff Knight]

According to the guy at Glen Burnie thats involved with the dodge-cummins program the HO will still have the HX35 on them. They are going to use both the HY & the HX on the 03's. Jeff

 

[DWest]

turnbuckle

KatDiesel: What is a turnbuckle and how does it affect the wastegate? Can't find much on the search that I can understand. On my GM the wastegate was vacume operated, The earlier non electronic 6. 5s were mechanical wastegates, is this somewhere in between or what?

 

[zimman20]

DWest: Try this link for starters:



https://www.turbodieselregister.com/forums/showthread.php?s=&threadid=11627



Unfortunately the link to the pictures is no longer there. You could try an e-mail or PM to ZMAN (the OTHER zman, not me), the

originator of the thread above, to see if he could e-mail you the pictures. It's simple once you see it.



You can try a search on userid 'zman' or word 'turnbuckle' and find lots of info on this. Good luck.





zman (the OTHER zman)

 

[TORQUS MAXIMUS]

DWest

If you want a cleaner looking installation than the unsightly looking turnbuckle, then I suggest you go with the . 22 lr shell route. Like I said it's a cleaner install and nobody(dealer) can't see it. Just disconnect the hardline from the wastegate and push the . 22 shell in the opening of the hard line to plug it up. You should put a little crimp on the open end of the . 22 shell to make it easier to push it in the hardline. You'll probably need pliers to push it in. Before you start though, you'll have to remove you're air filter housing. Hope this helps. -Ray-

 

[DWest]

Disable Wastegate

Okay guys how about this one. What if I tried to put a slight crimp in the hard-line where it comes out of the turbo with a vise grip pliers to hold the wastegate back a little? It sounds low tech but no more so than putting a turn buckle on it. If not the spring Idea sounds good too. Just am not real sure I want to totally disable the wastegate. DW

 

[M Evan]

Re: Disable Wastegate

Originally posted by DWest

Okay guys how about this one. What if I tried to put a slight crimp in the hard-line where it comes out of the turbo with a vise grip pliers to hold the wastegate back a little? It sounds low tech but no more so than putting a turn buckle on it. If not the spring Idea sounds good too. Just am not real sure I want to totally disable the wastegate. DW

I think you will damage the hard-line, and for sure mark to see you tampered with it. If you put turnbuckle is very easy to take it off and don't leave any trace. If you want wastegate to work little, use this 22 shell to block hard-line and drill small hole in it, to let wastegate work when pressure is bigger.

M

 

[Mallory]

The turn buckle needs to be about 7 inches long and you will need an "s" hook. it takes five min. to install if you have done it before. Put one hook on the short arm directly under the exhaust side of the turbo, it is on one end of the rod that runs from the arm to the boost acuator (looks like a small canister about 2 inch. in diameter). that canister attaches to the intake side of the turbo, the other hook attaches to the bracket that holds the canister. The rod I mentioned runs under the turbo parallel to the wheel base of the truck. One good thing about the hy turbo is how fast it comes on boost, with your setup it will be quick. Good luck.

 

[zimman20]

The other problem with the . 22 shell is that it will be semi-permanent; if you have a fueling box and want to take it off for a trip to the dealer or other you'll have to take the hardline off of the wastegate again and remove the shell, if you forget or don't take it out you'll set an overboost code which I believe (someone correct me if I'm wrong) will have to be cleared by the dealer and they'll know something fishy is going on.



With the turbuckle set up it's external and can be removed easily if the truck needs to go in for service. Just something to think about.



Also, not all of us have access to spent . 22 shells (I don't!)





zman

 

[KKaiser]

Glad this topic came up. I'm running an EZ, with the turnbuckle on my HY35 and while trailering, am seeing up to 30 lbs of boost. My compressor section is now a nice golden color. Is 30 lbs too much for the baby turbo to handle or am I OK??



Kent

 

[zimman20]

Kent- 30 lbs of boost is about right. Anywhere from 30-35 psi with your setup is what you're looking for.

 

[DWest]

Wastegate still opening

Tried the 22 shell yesterday, same results. This truck won't boost over 20 lbs. Can't figure this out, the EZ box should take care of any over boost codes and the 22 should stop the wastegate from dumping boost but it shoots up to 20 lbs and stops there. This is with 5000 lbs behind the truck so the load is plenty to test the turbo. I think I'll try Zman's turnbuckle next, any other ideas. DW