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98.5-02 Performance Parts Discussion Discussion of Performance Parts For the 98-02 Trucks No Advertising ...NO ADVERTISING

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post #1 of 59 (permalink) Old 12-02-2019, 03:23 PM Thread Starter
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I know this question has been asked a million times, but everyone's situation is different, so I will ask again. Please bear with me.

I have a 98.5 24v Dodge 3500 2WD. 5 speed manual trans, 110k miles. Stock except for a 4" exhaust. I just bought a 38' fifth wheel that fully loaded checks in at about 15,000 lbs. My truck is woefully underpowered for towing this behemoth, and needs help.

I've already bought a Raptor 150gph lift pump, and know I need to replace the clutch. Looks like South Bend makes a 350-400 hp one that's good for towing. But I need to boost power and don't know what is enough vs too much. Reliability is more important to me than max performance. My goal is to be able to go over interstate hwy passes in the west at 50mph in 4th gear. That's all I ask...

My current thoughts are to start with bigger injectors - but how much bigger? Then a cold air intake. Will I need a tuner? I've looked at the Quadzilla and like it, but there are lots of options. Other things I'm over looking? Things to avoid? I know I will need gauges as well. Thanks for the help.

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post #2 of 59 (permalink) Old 12-02-2019, 04:24 PM
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I would get a good organic single disk clutch and quadzilla adrenaline. Check out moparman1973 forum, they have a ton of quad knowledge and custom tunes too.
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1998 P-Pumped 24v, 4x4, NV4500 swap
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post #3 of 59 (permalink) Old 12-02-2019, 05:26 PM
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7 x .010's and a quadzilla would be a good fit. Skip the intake as it isn't really an issue.

Assuming your turbo is in good shape it should be happy with the 7 x .010's and the quad on lvl 3 towing. The tuning will make it run good / control smoke.

2018 3500 CCLB G56
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post #4 of 59 (permalink) Old 12-02-2019, 08:24 PM Thread Starter
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Thanks. I will go there and check it out. Yes, I think a single disk clutch is the way to go. My wife will be driving the truck occasionally and neither one of us need anything too aggressive.
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post #5 of 59 (permalink) Old 12-02-2019, 08:38 PM Thread Starter
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Thanks! 7x.010 is bigger than I thought I would need, but considering the serious lack of power I experienced towing the new 5W home, it may well be exactly what I need. On every mountain pass I was down to 3rd gear at 30mph with the flashers going. Am I going to need to be concerned about EG Temps?
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post #6 of 59 (permalink) Old 12-02-2019, 08:42 PM
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If you get a quad, you can tune the temps down to your liking but a bigger turbo would help with temps and power.

1998 12v, 4x4, Club Cab, Carli, Thuren, BlueTop, Core 4x4, BD Diesel, PDD 5x.012, South Bend
2012 Laramie Longhorn, EFI by Ryan, Carli, Thuren
1995 Dually, Weston's 5x.016, 4k GSK, 5" FloPro, 255/85r16 Toyo M/T, Goerend, ARP, 60# Springs, BW 62/65/14, BW 75/96/1.10, Isspro, Fass 125, BDP Sump, 7mm DV's, 751 HP 1883 FP Torque on NOS
1998 P-Pumped 24v, 4x4, NV4500 swap
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post #7 of 59 (permalink) Old 12-02-2019, 11:01 PM
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7 x.010's give you the power you need while keeping duration low.

This gives a nice power band with cool egts provided your tuning is right.
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post #8 of 59 (permalink) Old 12-02-2019, 11:06 PM
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The 275 horse RV injectors used to be the rage in those first 24 valve engines and they were cheap. I put bigger towing turbos on my 5.9's and I firmly believe that the stock turbos on the cummins are all too small… The towing turbos alone made a huge difference.
I had a 9712 valve five-speed with 3.54 gears and it was way way too high geared even when I worked my way up to a 10,000 pound RV. I don't know what gears you have but if they're 354s I definitely go to 4.10s, at least. FWIW, when I went from the 10,000 pound RV to my current 15,000 pound RV I also went from SRW to DRW and I would never go back. Craig

2012 CCLB 4wd dually, 3.73, 68rfe, Fass, BD IH and E-brake kits. DD and towing machine.
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post #9 of 59 (permalink) Old 12-03-2019, 12:57 AM
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Take a look at my sig because I tow a 39' 14k toy hauler.
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post #10 of 59 (permalink) Old 12-03-2019, 08:44 AM
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Take a look at my sig because I tow a 39' 14k toy hauler.
I agree. I ran that combo for 12 years on my '01. Not one ounce of trouble and it gave me 335hp/800tq to the ground. I don't think I would want any more than that, towing heavy with the NV4500. I would not go with 4.10's, they will give you too much power in 5th. 3.55's will force a down shift to 4th, a good thing.

For simplicity, reliability, power made for money spent, the above combo is hard to beat. Keep in mind, RV 275 injectors are new Bosch, not rebuilt. They will last a long time.

The quadzilla is fine if you are computer literate, I am not.
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post #11 of 59 (permalink) Old 12-03-2019, 04:14 PM Thread Starter
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Thanks everyone for the great info! Sounds like I'll start with the bigger injectors and the Adrenaline. Regarding final drive ratios, I know I don't have the 4.11. But I don't think I have the 3.55. Did Dodge make something in between? A 3.78 or 3.84??? I'm running right at 65mph at 2000 rpm in 5th - which seems about right to me. I know that 5th gear is the weak point on that NV4500 trans, and I'm happy to go to 4th on the steep hills. I'm seldom in a hurry.

One additional question: While I have no reason to believe that my injection pump is going bad, is there a way to test this before going forward with the engine mods? Or would testing with different tuner settings tell me?
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post #12 of 59 (permalink) Old 12-04-2019, 02:17 PM
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Quote:
Originally Posted by Greysquirrel View Post
Thanks everyone for the great info! Sounds like I'll start with the bigger injectors and the Adrenaline. Regarding final drive ratios, I know I don't have the 4.11. But I don't think I have the 3.55. Did Dodge make something in between? A 3.78 or 3.84??? I'm running right at 65mph at 2000 rpm in 5th - which seems about right to me. I know that 5th gear is the weak point on that NV4500 trans, and I'm happy to go to 4th on the steep hills. I'm seldom in a hurry.

One additional question: While I have no reason to believe that my injection pump is going bad, is there a way to test this before going forward with the engine mods? Or would testing with different tuner settings tell me?
If you're concerned with reliability and drive-ability then I would stay away from any tuner which taps the fuel solenoid wire on the VP. You dont need all that power the Adrenaline will give and all you're going to do is force yourself to get a very aggressive clutch to hold all that power, which will eventually make driving it no fun. As I mentioned before, I only have an EZ and RV275 for power (not including the aFe and exhaust) and my truck is a towing monster. The ONLY limiting factor for my trucks tow-ability is the 5-speed. If I had a few more gears spread out across the RPM gap this truck could tow a house straight up. So dont make the mistake some have by thinking you need a 500 hp truck.

That said, the NV4500 has a weak 5th gear so DONT tow heavy in OD. Not only will it generate tons of internal heat which causes the fluid to run excessively hot, but it also will eventually give out. Tow heavy in 4th gear because its 1:1 drive ratio and will keep RPM's up for adequate boost, oil pressure, and allow great hill climbing. I rarely have to downshift into 3rd on the open freeways when towing our gigantic glamp trailer.

Lastly, here's an RPM/tire/gear ratio chart for you to understand what gears you have. Remember, tire size will affect the speedo too. http://dodgeram.org/tech/specs/axle/rpm_vs_mph.htm

'01 2500 Sport 4x4 5spd w/Fastcoolers, Mag-Hytec, EZ, RV275's, 4" w/o muffler, South Bend, Steering brace, aFe, 2 lo kit, Isspro Boost, FP, and EGT on pillar, Westach Trans/Diff temp gauge in dash pod, Raptor 100 w/ 1/2" line, Pac Brake, Rancho 9000, 285's
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