Engine/Transmission (1998.5 - 2002) 12 Valve vs. 24 Valve

[DieselTorque]

hi guys, i am soon going to be in the market for a used pickup.



ram ctd prefered.



i am having trouble in deciding which engine i want 12V mechanical or 24V electronic. any help would be greatly appreciated.



thanks

 

[Hohn]

hi guys, i am soon going to be in the market for a used pickup.



ram ctd prefered.



i am having trouble in deciding which engine i want 12V mechanical or 24V electronic. any help would be greatly appreciated.



thanks

There are a million ways to answer this for a million reasons... .



But I'll take a stab at it.



For sheer convenience of BOMBing, a 24V is hard to beat-- just plug in and go. A 12V will be cheaper to bomb to modest hp levels, though not as convenient. The P7100 pump is both the blessing and the curse of the 12V-- you have to get into it to make any power changes, but it can make a LOT of power. You'll note that most of the HUGE hp guys run the 12V pump if not a 12V engine...



12V pros:

--simple hp

-- can be tuned to your taste (more mpg, more smoke, etc)

-- can deliver more fuel for big hp

-- heads less prone to crack across valves

-- all mechanical design is simple and reliable (minus kdp)

-- generally, better mpg than 24V

12V cons:

-- comes in an older truck (worse brakes, weaker trans, older interior, etc)

-- KDP- Killer Dowel Pin which can cause a LOT of damage if not addressed

-- Bombing requires pump work- no plug and play

-- heads flow less air

-- "dumb" pump can't vary timing- narrower stock rpm range



24 Cons:

-- LIFT PUMPS want to die

-- restrictive OEM fuel delivery

-- injection pumps are less reliable than 12V trucks, but much cheaper (still pretty reliable when taken care of)

-- louder engine, more clatter (though Cummins claims they're quieter, most 24V are really louder)

-- some 24Vs have a tiny oem turbo that doesn't give much room for HP upgrades (01-02 auto trans trucks)

-- some 24Vs also have KDP vulnerability



24V pros

-- more airflow though head

-- centered fuel injector

-- higher injection pressure

-- comes in newer truck

-- easy bombing of just plug and play

-- availability of NV5600 trans



If you are either going way cheap, or are going for HUGE hp, then a 12V is probably better.



If you're in the middle, a 24V is probably better. I love mine...



Justin



EDIT: Sheer, not sheet, duh!

 

[WhiteGoat]

Is there any way to tell if you have the KDP in your 24V?



Thanks,

Larry

 

[Joseph Donnelly]

White, you have to take off the stamped steel gear case cover to see if you have the updated gear case that retains the dowel.

 

[csevers]

heads less prone to crack across valves..... HUh? They crack alot between valves and injector hole just as bad.



Find a truck you like model,color,trans and such and it will make up your mind for you, if you like a qaud cab or not that narrows it down, if you want a 6spd that also leads you in a direction. Do YOU like the 94 to 97 interior or the 98-02 interior.



Good Luck with YOUR choice



Craig

 

[DieselTorque]

thanks for the info guys.

 

[DieselTorque]

made up my mind,



gonna get a 24 Valve Oo.



but... ... ... ... ... .





a 12 valve is in my future as well, to mod extensively,race, and yet... ... ... ... .





will keep my eyes open for... ... ...





2006-07 3500 LWB DRW 6 SPD MEGA CAB 4x4 CTD PWRD

 

[RSchwarzli]

Quote " will keep my eyes open for... ... ... 2006-07 3500 LWB DRW 6 SPD MEGA CAB 4x4 CTD PWRD"



HELL YA!! I NEED at least one of those to!!! Oo. Oo. But HEAVILY Bombed.