Existing 12v to 24v - Competition Diesel.Com

Penni · 12-15-2012, 09:48 PM

I have researched this is inside of this forum and found that most all of these threads are aimed at taking a vp44 to a p-pump but what about taking an existing p-pump and putting a 24v head on it, i believe this to be the same in concept as p-pumping a 24v but with subtle differences? obviously needing new fuel lines, pistons, and I'm sure many other things... but anybody's thoughts and/or opinions on this? This is general question and I expect general answers, my ultimate goal is making a dedicated 2.6 truck with this set-up.... Are there any major issues im not considering or majorly overlooking? And this might be "dumb" of me but i did search before posting... just saying... lol

little6cylinder · 12-15-2012, 10:40 PM

I did this. CR head on a 97 block. I like it for drag racing but just for simplicity and durability I'd stick to a 12V head for sled pulling. The 12v head is good for big rpm's.

9724VF350 · 12-15-2012, 10:46 PM

I've done it twice. Sort of. More like started with a large selection of parts and put together 2 ppump 24V's with 12V blocks.

I'm going 12V from here on out.

Penni · 12-15-2012, 10:52 PM

i thought a 24v (CR or vp44) head flowed better than a 12v regardless? With equal amount of time/money put into each respectively...

WhiteKnight · 12-15-2012, 11:07 PM

A 24v head will flow more stock to stock. But even with minor exhaust porting on a 12v you can make some difference. Ive always like 24vs over 12vs but they are definatly a little more pricey; valve springs, injectors, cross over tubes, head work, etc.

little6cylinder · 12-16-2012, 12:29 AM

Quote:

Originally Posted by Penni

i thought a 24v (CR or vp44) head flowed better than a 12v regardless? With equal amount of time/money put into each respectively...

The CR head flows quite a bit more.

Penni · 12-16-2012, 12:36 AM

ok could you give a small break-down of running a common rail head with a p-pump... i.e. go over the general steps (pistons, custom fuel lines im guessing??)

and then from a cost stand point, since you (little6cyliner) have already done this, would the money i might spend switching to a 24v head be better spent at the machine shop in my motor/head i already have?? Pros/Cons??

DISTURBED · 12-16-2012, 07:47 AM

On a 24v valve you are limited to the size cam you can run. You can't run as much lift do to the valve train. .500 lift is all you can run with out spending a lot of money in a head girdle and new rockers/springs

little6cylinder · 12-16-2012, 12:33 PM

Swapping heads - Competition Diesel.Com - Bringing The BEST Together

This might help.

Penni · 12-16-2012, 11:38 PM

Quote:

Originally Posted by little6cylinder

Swapping heads - Competition Diesel.Com - Bringing The BEST Together

This might help.

Helps greatly!! after reading that, i dont think its worth tackling for what im aiming for, just a fun work-stock puller, much appreciated little6 !!! Probably gonna end up putting a few bills in my 12v head and calling it good... Thanks again....

12-15-2012, 09:48 PM	#1
Penni Name: Penni Title: Too Much Time Status: Not Here Join Date: Oct 2010 Location: Southwest MO Member`s Gallery Posts: 1,351	Existing 12v to 24v I have researched this is inside of this forum and found that most all of these threads are aimed at taking a vp44 to a p-pump but what about taking an existing p-pump and putting a 24v head on it, i believe this to be the same in concept as p-pumping a 24v but with subtle differences? obviously needing new fuel lines, pistons, and I'm sure many other things... but anybody's thoughts and/or opinions on this? This is general question and I expect general answers, my ultimate goal is making a dedicated 2.6 truck with this set-up.... Are there any major issues im not considering or majorly overlooking? And this might be "dumb" of me but i did search before posting... just saying... lol __________________ Mike 98 - 12v, under construction now, eventually a dedicated 2.5 puller 06 - QCSB - G56, 3250 SB DD, Fass 150, Arson III, 90hp DDP, EFI Live by Done Right Diesel Performance, CTS Insight, S&B CAI, Full Audio System 1972 - Chevy C-10 longbed, also rebuilding slowly

12-15-2012, 10:40 PM	#2
little6cylinder Name: little6cylinder Title: Everything is "fixable" Status: Not Here Join Date: Mar 2011 Location: Colorado Member`s Gallery Posts: 1,218	I did this. CR head on a 97 block. I like it for drag racing but just for simplicity and durability I'd stick to a 12V head for sled pulling. The 12v head is good for big rpm's. __________________ 97 Dodge ECLB, Super Street Built at Granby Truck Shop

12-15-2012, 10:46 PM	#3
9724VF350 Name: 9724VF350 Title: Tractor Guy Status: Not Here Join Date: Mar 2010 Location: Northeast Ohio Member`s Gallery Posts: 2,784	I've done it twice. Sort of. More like started with a large selection of parts and put together 2 ppump 24V's with 12V blocks. I'm going 12V from here on out. __________________ 97 F350 4X4 CC Dually 5spd 24V 913 S300/HT3B Ranch Hand. Playtoy-Oliver 1655. 12V now, 13mm, S475 Wife's ride-03 Excursion 12V swap in the works.

12-15-2012, 10:52 PM	#4
Penni Name: Penni Title: Too Much Time Status: Not Here Join Date: Oct 2010 Location: Southwest MO Member`s Gallery Posts: 1,351	i thought a 24v (CR or vp44) head flowed better than a 12v regardless? With equal amount of time/money put into each respectively... __________________ Mike 98 - 12v, under construction now, eventually a dedicated 2.5 puller 06 - QCSB - G56, 3250 SB DD, Fass 150, Arson III, 90hp DDP, EFI Live by Done Right Diesel Performance, CTS Insight, S&B CAI, Full Audio System 1972 - Chevy C-10 longbed, also rebuilding slowly

12-15-2012, 11:07 PM	#5
WhiteKnight Name: WhiteKnight Title: Too Much Time Status: Not Here Join Date: May 2009 Location: Brewster, MA Member`s Gallery Posts: 645	A 24v head will flow more stock to stock. But even with minor exhaust porting on a 12v you can make some difference. Ive always like 24vs over 12vs but they are definatly a little more pricey; valve springs, injectors, cross over tubes, head work, etc. __________________ 98.5 24v P7100, s485 Last edited by WhiteKnight; 12-15-2012 at 11:08 PM.

12-16-2012, 12:36 AM	#7
Penni Name: Penni Title: Too Much Time Status: Not Here Join Date: Oct 2010 Location: Southwest MO Member`s Gallery Posts: 1,351	ok could you give a small break-down of running a common rail head with a p-pump... i.e. go over the general steps (pistons, custom fuel lines im guessing??) and then from a cost stand point, since you (little6cyliner) have already done this, would the money i might spend switching to a 24v head be better spent at the machine shop in my motor/head i already have?? Pros/Cons?? __________________ Mike 98 - 12v, under construction now, eventually a dedicated 2.5 puller 06 - QCSB - G56, 3250 SB DD, Fass 150, Arson III, 90hp DDP, EFI Live by Done Right Diesel Performance, CTS Insight, S&B CAI, Full Audio System 1972 - Chevy C-10 longbed, also rebuilding slowly

12-16-2012, 07:47 AM	#8
DISTURBED Name: DISTURBED Title: YEA WE RIDE THE SHORT BUS Status: Not Here Join Date: Nov 2007 Location: Winchester, Va Member`s Gallery Posts: 6,417	On a 24v valve you are limited to the size cam you can run. You can't run as much lift do to the valve train. .500 lift is all you can run with out spending a lot of money in a head girdle and new rockers/springs __________________ Thanks, Jeremy 01 CTD Retired sled puller, dedicated "Twin Turbo" tow rig 96 CTD "TOO" Disturbed 3.0 - Built by Disturbed Diesel Performance 96 CTD "The Sickness" 2.6/2.8- Built by Disturbed Diesel Performance

12-16-2012, 12:33 PM	#9
little6cylinder Name: little6cylinder Title: Everything is "fixable" Status: Not Here Join Date: Mar 2011 Location: Colorado Member`s Gallery Posts: 1,218	Swapping heads - Competition Diesel.Com - Bringing The BEST Together This might help. __________________ 97 Dodge ECLB, Super Street Built at Granby Truck Shop