24 V cummins or 12 V cummins?

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logan1

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Aug 13, 2017
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I come to your from the world of Powerstroke Diesels. I've owner ford truck my entire adult life and my last truck as a 1995 F350 CCLB with a 7.3L PSD with 180CC injectors, S336 turbo, and a ZF 5 speed transmission with a Southbend dual disk clutch.


In in the market for a fun lil truck that I can modify over the winter and I want to work on something other than a powerstroke. I know I want a manual transmission and I know i want a 2WD truck.

My Goals:
Fun daily driver. Compound turbos S300/S400. 5x14 or 5x16 injectors. Head studs and a Southbend dual disk clutch and the usual gauges and programmers etc.


So my questions is should i go for a 24V or a 12V cummins? Also what truck would give me the best bang for my buck.

There are 4 truck on my local craigslist that are on interest to me but i cant decide if i want to build a 24V or a 12V.

The 24 V trucks:
Dodge Ram 2500 Cummins/5speed - cars trucks - by dealer - vehicle automotive sale

2002 Dodge Ram 2500 Cummins - cars trucks - by owner - vehicle automotive sale

The 12 V trucks:
Dodge Ram 2500 Diesel 12 Valve - cars trucks - by owner - vehicle automotive sale

1998 dodge ram cummins diesel 2500 - cars trucks - by owner - vehicle automotive sale
 
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Anyone have any constructive advice about my query?

I understand that in the world of keyboard warriors it’s customary to berate the new guy for asking questions but if anyone with experience with these motors could provide some constructive advice it would be much appreciated.
 
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What's your power goals? Both can be built relatively cheap. 24v you have to deal with vp44 and more electronics, 12v can be done somewhat cheaper to a certain amount of power, but then you have to deal with static timing
 
Cool thanks guys I'm leaning towards the 12V but I really like the idea of turning down the motor for better MPG while driving around town at the press of a button. But as mentioned I do like the reliability of a P-pump. Would a VP44 pump be reliable if I added a FASS 150GPH titanium lift pump?

I don't really have any power goals. I just really want to own a compound turbo setup since I've never really had one before. but o guess I would say around 600HP would be good.

I was just giving the 5 hole injectors as an example of size but im open to a similar injector on the 24V side.
 
If you can live with a 7.3 you won't have any problems with VP reliability.

Your list of desires and reasoning makes very little sense, but it's your money.
 
To ever daily drive a 600hp truck and actually trust it to get you from A to B you will have a fortune in supporting mods.
 
Ya gonna disagree completely with that statement. Both a 24v and 12v bottom end will take 600 hp easy. Heads would be simple as valve springs, push rods, and head studs. Maybe rod bolts. 600hp daily isn't hard or expensive at all
 
Justappumped24v said:
Ya gonna disagree completely with that statement. Both a 24v and 12v bottom end will take 600 hp easy. Heads would be simple as valve springs, push rods, and head studs. Maybe rod bolts. 600hp daily isn't hard or expensive at all
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Exactly.
 
Awesome... this is going to make an awesome winter build for me.

Will i need fire/ o-rings machined into the heads?
 
Also ive been doing some research and it would appear that going with a 2002 24v would give me disk brakes on all corners.
 
displacedtexan said:
If you can live with a 7.3 you won't have any problems with VP reliability. .
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Or just read Gary's dead petal thread and that should help make your decision.

I'd lean towards a 12v based on your goals. Less wires, more mechanical linkage. In the end, wires = headaches for the above average shade mechanic.
 
logan1 said:
Awesome... this is going to make an awesome winter build for me.

Will i need fire/ o-rings machined into the heads?
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Depends on your turbos, torque down low kills headgaskets. s300/400 I wouldn't bother in the 600hp range.
 
roost said:
Depends on your turbos, torque down low kills headgaskets. s300/400 I wouldn't bother in the 600hp range.
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Or run a s300 and s400 and properly tune it to keep the power out of it down low and make the turbos reliable nice 362sxe over a budget beater 475 will do great
 
Keep power out of it down low? Wtf is the point of owning a diesel truck at that point then!?
 
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