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Open Roads Forum  >  Fifth-Wheels

 > 5.9 Cummins Diesel Towing capacity

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Cummins12V98

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Posted: 06/19/20 01:10pm Link  |  Quote  |  Print  |  Notify Moderator

Cummins12V98 wrote:

I know bags technically don’t add capacity. BUT as an example my 15 RAM only has two thin full leaf springs with two short ones to control axle wrap. My rear axle weight is at least 9,750# with 6k pin. Truck is rock solid.

So take it for what it’s worth!

2000-2002 it’s easy to upgrade to 2003-2009 3rd gen front brakes. Insane braking difference!!!


Above with 4.10’s and exhaust brake good to go IMHO.


2015 RAM LongHorn 3500 Dually CrewCab 4X4 CUMMINS/AISIN RearAir 385HP/865TQ 4:10's
37,800# GCVWR "Towing Beast"

"HeavyWeight" B&W RVK3600

2016 MobileSuites 39TKSB3 highly "Elited" In the stable

2007.5 Mobile Suites 36 SB3 29,000# Combined SOLD

94-D2

Sutter Creek ca

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Posted: 06/25/20 02:49pm Link  |  Quote  |  Print  |  Notify Moderator

Had my 99 2500 over a 7 mile 3500’ pass (6% I think). Trailer is a 16k bighorn. 5.9 had a power puck, 100 hp injectors, 4” turbo back, upgraded cooling, pack brake, And built 47re and 4:10’s.

55 mph, l/o overdrive, 1900 rpm 1ooo-1100* f on egt’s. 1/4 throttle all the way over. Never even bogged down. On flat ground tow at 65, 16 mpg. Ran really good.


2018 Ram 3500 Crew Cab Laramie 6.7L, Aisin, air ride, Ram puck prep, SuperGlide 20K auto slide.
2018 Bighorn Traveler 4 slide w/Apt.



It’s not what you’ve done that commands respect, it’s what you do.

Happy Campin’

noteven

Turtle Island

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Posted: 06/25/20 07:16pm Link  |  Quote  |  Print  |  Notify Moderator

The cooling system in a pickup truck ginerally limits the engine to full power output for a 20% ish duty cycle at stock output settings.

If you have an old school manual trans you want to settle in and pull long grades in a gear at a rpm the engine will accelerate from part throttle, not cane it for all its worth then try grabbing a gear then nope downshift and cane it some more...

A modern pickup with auto trans should protect itself from unskilled drivers that don't know how to get a heavy vehicle up a long grade with analog controls.

vs a class 8 truck which has a 100% throttle on the rug duty cycle if you want.

rjsurfer

North Carolina

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Posted: 06/27/20 03:03am Link  |  Quote  |  Print  |  Notify Moderator

What would you guys call a safe max EGT temperature?

My 03 Cummins 5.9 is equipped with heavy duty (triple disc/solid billit shaft) 47RE tranny, 4" exhaust, modified air intake and tuner.

Thanks

Ron W


03 Dodge 2500 SRW,SB,EC
2018 Keystone 25RES
DRZ-400SM
DL-650

ferndaleflyer

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Posted: 06/27/20 07:32am Link  |  Quote  |  Print  |  Notify Moderator

Poor ol Durb. So we haul a little extra weight. My truck is a 15 year old DRW and I don't know what weight is where but it runs level and has about 165,000 mi on it towing. Total weight is right at 23,000lbs. This thing tows sweet at 70 or up the grades. 4.10 gears and automatic.

Durb

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Posted: 06/27/20 07:47am Link  |  Quote  |  Print  |  Notify Moderator

ferndaleflyer wrote:

Poor ol Durb. So we haul a little extra weight. My truck is a 15 year old DRW and I don't know what weight is where but it runs level and has about 165,000 mi on it towing. Total weight is right at 23,000lbs. This thing tows sweet at 70 or up the grades. 4.10 gears and automatic.


Hey Billy Davis, there is your answer, "So we haul a little extra weight." Just disregard vehicle ratings and engineered manufacturer specifications. They did it so you should be fine.

By the way, just tow that trailer at 70 MPH even though your tires will probably be rated for 65 MPH maximum. Ferndaleflyer does it so you should be fine.

* This post was edited 06/27/20 08:03am by Durb *

fj12ryder

Platte City, MO

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Posted: 06/27/20 07:49am Link  |  Quote  |  Print  |  Notify Moderator

rjsurfer wrote:

What would you guys call a safe max EGT temperature?

My 03 Cummins 5.9 is equipped with heavy duty (triple disc/solid billit shaft) 47RE tranny, 4" exhaust, modified air intake and tuner.

Thanks

Ron W
Personally I try to avoid being over 1200° if I can help it. I have hit that a few times when I wasn't paying attention, but it's not something I do on a regular basis. Some people have said not over 1400°, but that just seems to be pushing it too much for me. Generally dropping a gear and increasing the RPM will get the temps back down.


Howard and Peggy

"Don't Panic"

rjsurfer

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Posted: 06/27/20 09:32am Link  |  Quote  |  Print  |  Notify Moderator

I agree with 1200 as the max. Sometimes I wish I had a manual to make it easier to switch to a particular gear rather than playing with the overdrive button.

Ron

ferndaleflyer

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Posted: 06/27/20 07:24pm Link  |  Quote  |  Print  |  Notify Moderator

Sorry Burb didn't mean to ruffle your feathers----I in no way suggested what the OP should do only what I have done....But when you reach my age and have towed as much as I have with no accidents, tickets, etc I feel I can relate a fact---right or wrong.....And my 10 ply tires are fine at 70, did I say my trailer has 3 axels also if that means anything

Cummins12V98

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Posted: 06/27/20 07:49pm Link  |  Quote  |  Print  |  Notify Moderator

12 valve 1,250

24 valve 1,300

Pyro in exhaust manifold

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