Replacement for the CP4 pump?
FTE Legend
Joined: Mar 2017
Posts: 31,874
Likes: 9,170
From: Western NY
I agree that I've never seen a pressure drop, I always keep about half a tank of fuel in it also. For me I just like to see what's in the lower bowl. Helps me validate the stations I've been using and would allow me to make a correction sooner rather than later if I were to see something alarming.
Hopefully this DCR is a drop in reliable solution. I'd rather spend an additional $1600 and eliminate the problem forever versus put a bandaid on it that hopefully cathes all the debris if it fails.
Hopefully we start hearing some feedback soon!
Hopefully this DCR is a drop in reliable solution. I'd rather spend an additional $1600 and eliminate the problem forever versus put a bandaid on it that hopefully cathes all the debris if it fails.
Hopefully we start hearing some feedback soon!
As to the DPK kit being a band aide, sure it doesn't stop the pump from failing, but it does stop the debris from contaminating the rest of the fuel system so you don't have to spend more money when the CP4.2 fails.
Watch
Going to stick with the Gen2 DPK.
Reason being that it DOES work, there appears to still be a lot of misunderstanding on how the DPK functions. The way it is designed there is absolutely no way a failed pump can contaminate the rest of the system.
The ability to drive the truck with a failing pump and increased pump flow at 3000rpm+ is an added bonus.
It is also great for someone who doesnt use a fuel additive and buys fuel from rural fuel stations.
Reason being that it DOES work, there appears to still be a lot of misunderstanding on how the DPK functions. The way it is designed there is absolutely no way a failed pump can contaminate the rest of the system.
The ability to drive the truck with a failing pump and increased pump flow at 3000rpm+ is an added bonus.
It is also great for someone who doesnt use a fuel additive and buys fuel from rural fuel stations.
Man, haven't heard "spiel" in a long time... yep, I've pretty much mastered the spiel. And anytime I can throw in a gun reference, I'll take it...
S&S is the Glock of the DPK kits... they were the originator.
And like a Glock, that loves to run when dirty (but I do recommend cleaning them) the truck will keep running when the pump goes out with a DPK Gen 2 kit.
Apparently dealers are taking pre-orders on the DCR.
https://www.accuratediesel.com/s-s-d...onversion.html
DURABLE DCR HIGH-PRESSURE FUEL PUMP
The two-piston DCR pump is based on a compact and modular design for easy integration, has low hydraulic and acoustical noise, features ultra-fast response times, and is biofuel and low-lubricity fuel compatible. It uses a patented eccentric drive pumping technology, with pressure-lubricated cam and bushings, for increased performance, efficiency, and benchmark durability. The Fuel Control Actuator (FCA) uses high-quality corrosion-resistant components and proprietary features to prevent large debris from entering the actuator, providing exceptional robustness for longevity and durability in harsh environmental conditions. The DCR can provide a max fuel delivery of 1,250 mm3 per revolution (25% more than a CP4.2), producing plenty of flow for worn injectors that have high return.Last edited by Overkill2; Feb 19, 2023 at 08:16 PM. Reason: add to my spiel/ add more to post
Cargo Master
Joined: Feb 2015
Posts: 2,338
Likes: 255
From: Livermore Ca.
My understanding is, if the CP4 fails, everything from the pump to the injectors needs to be replaced, so yes, the FCA should be replaced as well. It does make me wonder as with 247kmiles, the FCA screens looked very clean. Maybe the filters have been doing a fantastic job! The vacuum pump was leaking, so there was a bit of oil all over the front of the engine. Hard to tell if it was the original or if the CP4 had been replaced. Oh, and I found a broken piece of plastic from the cold side turbo hose laying on the top of the engine (below the intake), so I'm guessing that one already failed and was replaced with another factory ford hose.
FTE Legend
Joined: Mar 2017
Posts: 31,874
Likes: 9,170
From: Western NY
Fleet Mechanic
Joined: Oct 2022
Posts: 1,821
Likes: 898
From: Dallas Metroplex
Thanks for the link, but it just seems like another press release article, to me. I was hoping that it was going to be a more in-depth review of the new pump.
It's going to be interesting to hear reports from those that purchase and install the pump, over the course of the year. That should be informative.
It's going to be interesting to hear reports from those that purchase and install the pump, over the course of the year. That should be informative.
FTE Legend
Joined: Mar 2017
Posts: 31,874
Likes: 9,170
From: Western NY
Thanks for the link, but it just seems like another press release article, to me. I was hoping that it was going to be a more in-depth review of the new pump.
It's going to be interesting to hear reports from those that purchase and install the pump, over the course of the year. That should be informative.
It's going to be interesting to hear reports from those that purchase and install the pump, over the course of the year. That should be informative.
Cargo Master
Joined: Feb 2020
Posts: 2,277
Likes: 949
A-Rod has one of the DCR pumps. I assume he will be installing in a truck.
Lead Driver
Joined: Feb 2022
Posts: 7,965
Likes: 4,042
Need one in a long term high miles setup like a hot shot truck. Same with the filter kit from SPE. Window dressing, or worth the cash?
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FTE Legend
Joined: Mar 2017
Posts: 31,874
Likes: 9,170
From: Western NY
Fleet Mechanic
Joined: Oct 2022
Posts: 1,821
Likes: 898
From: Dallas Metroplex
Thanks for the video. Sounds to me like in the final minutes of the video he explains that the pump simply supplies the rails with fuel, and the rails maintain the pressure. If that's indeed the case, then as long as the pump consistently provides fuel to the rails when demanded, the inference is that this DCR should suffice to replace the CP4 (and perhaps in later model SD's that have higher-pressure rails, although not explicitly stated).
Or, am I misunderstanding what he's inferring?
Or, am I misunderstanding what he's inferring?
FTE Legend
Joined: Mar 2017
Posts: 31,874
Likes: 9,170
From: Western NY
Thanks for the video. Sounds to me like in the final minutes of the video he explains that the pump simply supplies the rails with fuel, and the rails maintain the pressure. If that's indeed the case, then as long as the pump consistently provides fuel to the rails when demanded, the inference is that this DCR should suffice to replace the CP4 (and perhaps in later model SD's that have higher-pressure rails, although not explicitly stated).
Or, am I misunderstanding what he's inferring?
Or, am I misunderstanding what he's inferring?
I'll watch the end again and see if I can add anything more here.
Lead Driver
Joined: Feb 2022
Posts: 7,965
Likes: 4,042
The pump provides volume, Volume creates pressure when plugged up. So in a way, the injectors do provide pressure since they are only open for brief moments. The fuel pressure regulator bleeds off the pressure while the volume control on the pump provides flow.
The way it works, the lift pump provides a steady GPH flow rate of fuel to the pump, more than the pump can consume at max throttle, but at a low pressure. The pump then gets fed the fuel through the volume control, it regulates how much fuel can be pumped into the HP side based on fuel use through the injectors and fuel bleed off by the HP regulator. The larger the pump heads are, the more volume of fuel per stroke can be fed into the HP rails. So the larger the heads, the more volume, the more pressure can be created. Its like capping off a 1/2" garden hose compared to a 1" garden hose. The higher volume can create higher pressures.
The way it works, the lift pump provides a steady GPH flow rate of fuel to the pump, more than the pump can consume at max throttle, but at a low pressure. The pump then gets fed the fuel through the volume control, it regulates how much fuel can be pumped into the HP side based on fuel use through the injectors and fuel bleed off by the HP regulator. The larger the pump heads are, the more volume of fuel per stroke can be fed into the HP rails. So the larger the heads, the more volume, the more pressure can be created. Its like capping off a 1/2" garden hose compared to a 1" garden hose. The higher volume can create higher pressures.