Hello and good morning, I recently bought a 33' toy hauler. and I quickly found out that my rig is not set up for towing that kind of weight. wondering if I can get some recommendations for solving this dilemma. truck is all but stock with a juice with attitude programmer. set up is as follows, 01 3500 dually HO 5.9, 6 sp man NV5600,  front axle dana M60 f/ 248mmFBI, rear Dana 80 (hybrid) ( not quite sure what that means ) with 3.55 gear ratio, currently running LT 245/75R17 tire n rims. I work this truck 6 days week as a union pipeline welder, time is precious and I only want to have to do this once. does anyone have experience with the gear vender product? Anyways it time to burn rod, thank you in advance for any and all help.

As you see all 2nd gen list 245s for tires on the 2500 series. Even though most 4WD were 265s.

Edited June 27, 20177 yr by Mopar1973Man

I don't have a door sticker on mine but it definitely came with 265's as my speedo will attest.

I always wondered why the truck had a 265/75/R16 spare if it supposedly came stock with 245's.  The LSD sure wouldn't like that combo if the original tires were 245's..

Edited June 27, 20177 yr by trreed

My 96 had 245's on it and they always looked small. I did discuss that with the dealer when I bought the 02. Thats how it came to pass I got the 265's, they offered it as an option. It is all coming back to me now. Funny what 16 years will do to your memory. 

 

I did find out that the turbo is a Holset  HX35W, couldn't find out what size in MM thou. and the toy hauler is just under 10K with one bike in it. Thanks again for all the input, PS does anyone know what injectors come on the HO 5.9 ?

The stock HX35 is a 54mm turbo.  54/60/12 are the full specs.  I'm fairly certain injectors found in the HO are 7x0.0071, but correct me if I'm wrong.  I've been told the SO injectors are 7x0.0075, and that's the difference between the HO and SO injectors.

Edited June 28, 20177 yr by trreed

I've confirm the turbo specs on the HX35 is correct. Just the injector sizes don't seem right though. I know the injectors I've got are 7 x 0.0085 for +75 HP. 

 

Here is what I stole off of DAP site...

 

 

An exhaust is another great addition. They worth a look. One of the best mods I have made to my truck for towing and DD'ing.

4" is fine... No reason for 5". Even stock 3" will not hamper performance being after 15 years of stock 3" exhaust I've done very well at setting high MPG numbers in the past and performance is still awesome.

HX35W turbo too small for the 275 injectors ? exhaust is 4" turbo to muffler, dual 4" back.

on a side note, brake booster sprung a leak. looks to be from the flange closest to the fire wall. wet under side. are they rebuildable ?

I ran RV275 and +50HP injectors with a stock HX35W turbo. You can go up to +100HP injectors on a stock HX35W.

Mike where'd you get your 50hp injectors from again?

Vulcan Performance.

6 hours ago, Mopar1973Man said:

I ran RV275 and +50HP injectors with a stock HX35W turbo. You can go up to +100HP injectors on a stock HX35W.

 

I've seen guys run 250's on the stock turbo, but it's not a setup I'd reccommend or run for towing. 

 

RV275/50's with a boost elbow and 28-30 psi is about as much fuel as I would add on a HX35 and tow with... but I also prefer tow setups that allow WOT at 1600+ rpms below 8K feet without having to watch the pyro all the time. 

1 hour ago, AH64ID said:

 

I've seen guys run 250's on the stock turbo, but it's not a setup I'd reccommend or run for towing. 

 

RV275/50's with a boost elbow and 28-30 psi is about as much fuel as I would add on a HX35 and tow with... but I also prefer tow setups that allow WOT at 1600+ rpms below 8K feet without having to watch the pyro all the time. 

 

I thought that the RVs or 50s would allow any WOT runs without worry of EGTs?

Edited June 29, 20177 yr by notlimah

Depends on the tuning.  

Tuning is a big factor, as is the wastegate setting. Altitude and weight will also play a role. 

Lets say with a true stock truck and heavy trailer on a steep grade you can get rather wild EGTs without any mods at all. Let say one off my first towing trips with gauges I could pass the 1400 mark as I said truly stock.

39 minutes ago, Mopar1973Man said:

Lets say with a true stock truck and heavy trailer on a steep grade you can get rather wild EGTs without any mods at all. Let say one off my first towing trips with gauges I could pass the 1400 mark as I said truly stock.

 

But that's a stock tune, and those EGTs may be 100% acceptable for continuous operations. It's really hard to compare stock EGTs to tuned EGTs.