EZ Level 6 and towing?

[zari]

I asked this question elsewhere, but with no takers, so I'm trying again here...



I used to run my EZ with the boost elbow on lvl 4 with no problems towing my 5er (11,500lbs approx, GCW 20,000 lbs approx. ). After reading about the "non-documented" lvl 6 setting, I just had to try it.



Empty, my EGTs, at highway/Interstate speeds (up to 75mph or so) run right around 700*F (taken <b>pre-turbo</b>). When I push it, I can get 34-35PSI of boost, and temps around 900-1000*F.



I had to get horse feed, and was towing my flatbed bumper hitch, total weight approx. 6000lbs (GCW around 14,500lbs), and w/o 'gunning' it, I saw temps go up to 1100*F (or at least close to it) on some of the hills.



My question: Has anybody pulled a 5er with the EZ on lvl 6? If so, what have been your experiences? Given that the temps got up to 1100*F pulling only 6000#, I guess there's a good chance of temps going over 1250*F with the 5er? Would it be prudent to back the EZ off to lvl 4 when pulling the 5er?

 

[RustyJC]

Are your EGT readings taken pre-turbo or post-turbo?



Rusty

 

[Barry]

Rusty, I think he said he is pre-turbo. How do you get an EZ to level 6 and what is suppose to be the HP gain. I installed my EZ just like it came out of the box... ... ... ... . and, I would like a "little more".

 

[RustyJC]

Originally posted by Barry

Rusty, I think he said he is pre-turbo.

You're right, Barry, he did - when he edited his post 2 minutes after I posted the question. That's the problem with being able to edit a post after someone has responded - it makes our questions look pretty stupid at times.



Rusty

 

[Barry]

How 'bout we call it "sometimers disease"? My memory is still excellant, just short.

 

[zari]

If "::: :XX" is lvl 4 on the EZ, "::: XX:" is lvl 6.



And yes, I did edit my post, <em>and</em> added the pertinent info to my signature...



Anybody up to answer the questions?

 

[KLockliear]

Those temps sound way low for an 03 HO. Are you sure the gauge is reading right?

 

[zari]

Am I <b>sure</b> the gauge is 'right'? How could I be...



But they seem consistent. And revving her up to 34-35PSI does increase the EGTs pretty fast to the 1000*F+ range; although I haven't tried going beyond 75-80mph yet...



On the Interstate, around 70mph and 1950RPM, I am running around 5-8PSI of boost, and the temps are pretty much within the 650*F to 800*F range. Remember, I <em>am</em> running with the elbow that came with the EZ installed...

 

[KLockliear]

Sounds very low for an HO. Our 03 HO stock would make almost 1350 pre turbo.

 

[Barry]

I wished I could get mine to go down the road at 70 mph at 7 to 8 lbs. of boost. Mine take 12 to 15 on a good day... ... ... .

 

[lmills]

My stock HO doesn't go over 1000* pre turbo.

 

[Prairie Dog]

It's funny, some folks say they get 1200F with a stock motor and some (like me) can only hit 1000F. I wonder if it's the trucks that are different or the gages?

It seems odd that Cummins would allow them to run that hot.

 

[MUDDY]

mosyt get over 1300 stock. wonder if some guages be wrong. i had 1 guage then decided i wanted a 2nd to measure all 6,,,,,,,the 1st would go to 1350 and the 2nd guage i added would be at 1050 or so when the 1st guage be at 1350. took out the 2nd one and replace w/ new and both are within 20 to 40 degrees diff. one reason to have a backup

 

[pwr2tow]

Originally posted by Barry

I wished I could get mine to go down the road at 70 mph at 7 to 8 lbs. of boost. Mine take 12 to 15 on a good day... ... ... .

Mine use to be the same way, but now after 60,000 miles it will cruise at 6-8 lbs. of boost at 70 MPH, if there is a head wind then the boost will climb to 8-10. Things just need to break-in.

 

[DIESELMAN]

?? I could get my Stock '03 over 1100 POST turbo towing 7400lbs up a 6% at 4000' at 65MPH in 70 degree temps.



I can easily get to 1300+ PRE and 1100 POST pulling 13000lbs at 75MPH with my EZ on any setting. Of course I can pull some pretty steep grades doing so.



Mine seems happiest with EZ on 3, and the Boost elbow installed. The extra boost cools the EGT by 150 - 200 degrees at any given loaded speed, as near as I can tell.



In other words, without the elbow with a given load and hill I would back off at say 55 MPH, I would see at 55 with the extra boost lower EGT temps, and would be able to press on to 70 or more before needing to back out of it.

 

[zari]

Took the EZ off for my morning drive to work; elbow stayed on. Here's what I saw this way.



Truck empty (5er hitch in bed) with only me (175#) in it.



Interstate at 70mph, 1950RPM, OAT66*F.



Boost around 11PSI (btw. 10 and 12PSI).



EGT around 700*F.



Hitting her from 0 to 70mph, I got a max boost of 29PSI, and a max EGT of just under 1000*F.



Will reinstall the EZ and do the same tomorrow morning (maybe tonight on my way home).

 

[zari]

Numbers <b>with</b> <em>EZ lvl 6</em> (and of course elbow).



Interstate 70mph, 1950RPM, OAT81*F.



Boost around 7PSI (6-8PSI).



EGT around 625*F.



Hitting her from 0 to 70mph, max boost 34-35PSI, max EGT 1200*F.