Hauling 34,500 with an f350 p24v - Dodge Cummins Diesel Forum
98.5-02 24V P-Pump Conversion Discussion of converting 24V trucks from the VP44 stock pump to a P-Pump powered 24V No Advertising ...NO ADVERTISING

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post #1 of 5 (permalink) Old 06-07-2019, 08:27 AM Thread Starter
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Hauling 34,500 with an f350 p24v

Hey all, first post long time reader. Started up a forestry mulching and land clearing business and the skid steer is huge, T-Rex Rt350 with a 120 hp Cummins that weighs 13,5 with the mulching head. To tow it currently have a 96 f350 p pump 24 valve swapped truck with 3.55s on 35" toyo mt's load range F tires. Absolutely not ideal for towing 34,5k I know but i was wondering if anyone has any experience towing this kind of weight with something like this. Planning on an f550 as soon as money allows

I bought the parts truck already built and it was setup for race by a crazy hillbilly that thought all the fuel was best. It had 150 horse ddp injectors, full cut delivery valves and all afc adjustments set for max fuel with some weird 66/65/12 turbo. I didnt realize how maxed the fuel was and actually hauled the whole load 3 hrs home from where we bought it, with the 3.55s and 35s it hauled 70mph in 4th with about 975egts. I've since taken out the full cuts and yesterday started tuning the Afc down and it runs 100 times better empty, turbo spools way better and i actually hit 40psi, smoke actually clears up, still need to take out some pre boost fuel I think.

My question is can i tune this pump down enough to haul this load without smoking out all of Missouri down low, or do i need to either swap 4.10s in or get compound turbos? Will compound turbos tear my truck apart towing that much weight? perfectly fine driving conservatively while hauling that much.

I dont want to bore anyone with a much longer post but other truck specs include hydroboost brakes, 01 nv4500 with a 3250 dual disc, all alumunium 6.0 intercooler, quad motor mounts, superduty icon leave springs that actually haul the load awesomely, dual North star AGM batteries, fass pump set to 38 psi and custom filters. Thanks for reading and any input

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post #2 of 5 (permalink) Old 06-07-2019, 11:54 AM
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That's some tall gearing.... roll out of it slow that's all I can say. Maybe trying pulling a bit of fuel down low, then let it ramp up hard in the mid range to keep momentum up.
I assume it was set up to be a monster up top?

2002 ram 2500 quad cab shortbed ST. Red, 4x4, nv4500 swap 24v, 66mm silver bullet, 100hp injectors , fass titanium 150, 4" exhaust, guages. 190k miles.
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post #3 of 5 (permalink) Old 06-07-2019, 12:18 PM
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You need to figure out what size pump it is, what fuel plate ect. so the guys can help with tuning info. maybe also look into the afc live?

01 Sport QCSB, 55 block, nv5600 w/Fast coolers, valair org dd, fass 150,studded,dap 7x.013vco, ps62/475, Quadzilla Iquad, Timbo APPS, AFE blade runner, PacBrake PXRB, 5" exh, leveled, 285s,neon valve springs, 08.5 steering, fox stabilizer, redhead box
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post #4 of 5 (permalink) Old 06-12-2019, 01:19 AM
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You can setup the Cummins to deal with that kind of weight but's the only thing built hd enough for that kind task imo. Nv4500 wont like it either, heat will kill it eventually.
I use to tow 10~20k with a 94 f350 (4.10's) and it got sketchy. It was a good truck but you could feel it wasn't up to the task. Eventually retired it after the rear end blew up.

99 Ram 3500 SLT 4x4, P24v, ZF6-750, s362/475, 7x0.014, supporting mods.
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post #5 of 5 (permalink) Old 06-12-2019, 07:31 PM Thread Starter
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Haha yes "Monster up top" perfectly describes how it was set up

The pump was a 180 pump with an 8 plate ground to a 100 profile, .93 lines and crossover tubes. It had full cut dvs in it but i put in some cpp hot street delivery valves in. With the full cuts I had what i think may have been pre detontation rattle in higher rpms, the cpp hot street valves made it run so much better and got rid of the high rpm rattle. The star wheel was turned in so far i had to reach up under the plug after i took it off with a 90 degree pick to turn it back to where i could see it, turned it out about 30 clicks, runs way better and i can hit 40 psi boost, which is what it seems like the wastegate must be set at, fairly easy now. Never even saw over 30 psi when the truck was set up for full fuel. Lol

I think youre right that that kind of weight is too much for the truck and things will likely break, hopefully i wont have to use it too long as the tow rig. We did decide to swap in some 4.10 gears and detroit truetrac for the rear. After a few bid runs on jobs, it was pretty clear we needed lower gears just for the crazy hills and technical back woods road driving we're gonna be doing.

Thanks for the replies so far! Does anyone have any experience hauling loads with the nv4500 in 5th gear? I was doing a lot of reading and it seems like a split decision between "dont do it" and "its ok on a flat road with no lugging under 1500 rpms"
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