CP4
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1st Gear
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CP4
I have a 2013 ford f250 6.7 210,000 miles. I’d like opinions on the S & S Diesel CP4 to DCR pump conversion? Ive heard horror stories about the CP4 failures. Is the conversion a DYI? Is it worth the 2 grand plus installation cost? Thanks in advance
Lead Driver
Joined: Jan 2002
Posts: 8,691
Likes: 4,810
From: Itinerant
Only you know your mechanical skills and tools. There are a few of these videos but here is one. Can you handle this?
My 2016 truck is going in for a new turbo today and while it's apart having the DCR conversion done. Nothing wrong with my CP4 "but" why not? I don't get rid of my trucks for a new smelling truck and at 70k miles it should be around for awhile.
My 2016 truck is going in for a new turbo today and while it's apart having the DCR conversion done. Nothing wrong with my CP4 "but" why not? I don't get rid of my trucks for a new smelling truck and at 70k miles it should be around for awhile.
Fleet Mechanic
Joined: Oct 2022
Posts: 1,823
Likes: 898
From: Dallas Metroplex
For me, the DCR is simply peace-of-mind. No more worries about whether the CP4 decides to go south, especially when I'm 20 miles into the boonies at the ranch property. Nor, having to replace the entire fuel system should the DCR decide to fail.
I had planned to install the SPE DPK that I purchased long ago, but no need for it now. I'll be putting that up for sale in the forum marketplace soon.
I had planned to install the SPE DPK that I purchased long ago, but no need for it now. I'll be putting that up for sale in the forum marketplace soon.
More Turbo
Joined: Jun 2023
Posts: 622
Likes: 264
Outside of timing the crank and fan shroud removal it looks to be the same as a DPK (minus the new lines) install for the most part.
FTE Legend
Joined: Mar 2017
Posts: 31,962
Likes: 9,194
From: Western NY
Only you know your mechanical skills and tools. There are a few of these videos but here is one. Can you handle this?
https://youtu.be/KoRZTgGOdBw?si=zwtlqZxduRdhb9zy
My 2016 truck is going in for a new turbo today and while it's apart having the DCR conversion done. Nothing wrong with my CP4 "but" why not? I don't get rid of my trucks for a new smelling truck and at 70k miles it should be around for awhile.
https://youtu.be/KoRZTgGOdBw?si=zwtlqZxduRdhb9zy
My 2016 truck is going in for a new turbo today and while it's apart having the DCR conversion done. Nothing wrong with my CP4 "but" why not? I don't get rid of my trucks for a new smelling truck and at 70k miles it should be around for awhile.
FTE Legend
Joined: Mar 2017
Posts: 31,962
Likes: 9,194
From: Western NY
If my pump goes, i will probably have my buddy's shop, where I take my stuff, install a DCR. I'd probably take off and want to be involved as I'm learning as I go.
If you're not going to have a disaster kit installed, 400 dollars, and you're keeping your truck, IMO, the DCR is well worth it because with the DCR, there's no longer a worry about the high pressure pump going out and taking everything else on the system with it.
S&S had one of their many test trucks come in with water laden fuel, which rusted the metal cans of the aftermarket fuel pump the truck had and the DCR took it and kept pumping...
Last edited by Overkill2; Nov 4, 2024 at 07:11 PM. Reason: Correct post
Lead Driver
Joined: Jan 2002
Posts: 8,691
Likes: 4,810
From: Itinerant
I'm just a shade tree mechanic and jack of all trades. I.installed my S&S kit last year, the disaster prevention kit, myself after watching videos and taking notes.
If my pump goes, i will probably have my buddy's shop, where is take my stuff, install a DCR. I'd probably take off and want to be involved as I'm learning as I go.
If you're not going to have a disaster kit installed, 400 dollars, and you're keeping your truck, IMO, the DCR is well worth it because with the DCR, there's no longer a worry about the high pressure pump going out and taking everything else on the system with it.
S&S had one of their many test trucks come in with water laden fuel, which rusted the metal cans of the aftermarket fuel pump the truck had and the DCR took it and kept pumping...
If my pump goes, i will probably have my buddy's shop, where is take my stuff, install a DCR. I'd probably take off and want to be involved as I'm learning as I go.
If you're not going to have a disaster kit installed, 400 dollars, and you're keeping your truck, IMO, the DCR is well worth it because with the DCR, there's no longer a worry about the high pressure pump going out and taking everything else on the system with it.
S&S had one of their many test trucks come in with water laden fuel, which rusted the metal cans of the aftermarket fuel pump the truck had and the DCR took it and kept pumping...
I forgot the owner of truck had aftermarket filtering system but DCR kept on going.
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FTE Legend
Joined: Mar 2017
Posts: 31,962
Likes: 9,194
From: Western NY
I believe you're talking of this video...
https://youtu.be/HHC4hM-w-Hk?si=cQlZOVfRtCvBSqUj
I forgot the owner of truck had aftermarket filtering system but DCR kept on going.
https://youtu.be/HHC4hM-w-Hk?si=cQlZOVfRtCvBSqUj
I forgot the owner of truck had aftermarket filtering system but DCR kept on going.
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Hotshot
Joined: Jul 2013
Posts: 14,301
Likes: 2,197
More Turbo
Joined: Jun 2023
Posts: 622
Likes: 264
Scroll to 11:50 in the video.
More Turbo
Joined: Jun 2023
Posts: 622
Likes: 264
Just seems to make more sense to go with the DCR rather than the DPK unless I am missing something. From your earlier post above it appears you have had the DCR installed? If so how long have you had it? What differences have you noticed and how do you like it?
Fleet Mechanic
Joined: Oct 2022
Posts: 1,823
Likes: 898
From: Dallas Metroplex
I've had the DCR for almost a month now, and no issues at all. Other than the pump being a little quieter than the CP4, no difference in pressure performance that I can tell. If someone snuck a DCR under my hood without telling me, I would've never known it was replaced.
I didn't realize that the cam shaft was lubricated like it is (and cam surface floats on oil, like an engine crank or piston rod bearing), without watching that video. That's terrific, means no metal-to-metal contact under operation, so the pump should last forever (compared to the bucket and cam design of the CP4, which almost seems primitive in comparison).
I didn't realize that the cam shaft was lubricated like it is (and cam surface floats on oil, like an engine crank or piston rod bearing), without watching that video. That's terrific, means no metal-to-metal contact under operation, so the pump should last forever (compared to the bucket and cam design of the CP4, which almost seems primitive in comparison).
Hotshot
Joined: Jul 2013
Posts: 14,301
Likes: 2,197
. In their latest video - while their pump is sitting on the bench next to Bosch's CP4 that fella says that the crank can still lock up and run the valves into the top of the pistons.
Scroll to 11:50 in the video.
https://www.youtube.com/watch?v=P_tSKiq53LQ
Scroll to 11:50 in the video.
https://www.youtube.com/watch?v=P_tSKiq53LQ
Which crank are you talking about