Another CP4 solution
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Cargo Master
Joined: Oct 2019
Posts: 2,853
Likes: 1,199
From: Southeast MO
Yep, totally different setup.
Laughing Gas
Joined: Jul 2020
Posts: 1,070
Likes: 283
Interesting idea, I would defiantly wait this one out if it were me.
I think the cp3 has traditionally been used in lower pressure applications than the 6.7 so the verdict is still out on reliability at this higher pressure.
Also not big on the belt driven idea either but if the pump itself is reliable then I could get past the belt drive.
I think the cp3 has traditionally been used in lower pressure applications than the 6.7 so the verdict is still out on reliability at this higher pressure.
Also not big on the belt driven idea either but if the pump itself is reliable then I could get past the belt drive.
Cargo Master
Joined: Aug 2002
Posts: 2,117
Likes: 8
From: Over Yonder, MN
This piece seems to replace the CP4, I think. Looks like a manifold so the factory lines stay in place and the two lines in the picture run to this manifold. I'm just not sure what the purpose of the shaft is unless it runs to something on the front side of the engine? I'm not familiar with that area so not sure.
Cargo Master
Joined: Jul 2011
Posts: 2,675
Likes: 979
From: Walpole, MA
Dual high pressure pumps is pretty common on high performance set ups (Drag racers, sled pullers, etc), if your running garden hose flow injectors a stock pump has no chance of keeping up and a heavily modded pump can have reliability issues so dual pumps is your best option. Loads of kits made for Duramax and CR Cummins applications over the years.
Yeah GM and Ford went to the CP4 due to the higher pressure requirements of their fuel systems. Out of the box the CP4 doesn't flow as much as the CP3 but can generate higher pressures. CP3 swaps were common on LML duramax and most kits are no tune required so there is a precedent for CP3s operating in an elevated pressure environment. Will be very interesting to see how SPE prices this and how the execution shakes out.
Thus far, the DCR seems to be a pretty solid success. That said the CP3 is the gold standard of light duty high pressure injection pumps, coming from a CR Cummins back in the day I do have a soft spot for them. Worst case, nice to know there are multiple CP4 alternatives on the market now.
Interesting idea, I would defiantly wait this one out if it were me.
I think the cp3 has traditionally been used in lower pressure applications than the 6.7 so the verdict is still out on reliability at this higher pressure.
Also not big on the belt driven idea either but if the pump itself is reliable then I could get past the belt drive.
I think the cp3 has traditionally been used in lower pressure applications than the 6.7 so the verdict is still out on reliability at this higher pressure.
Also not big on the belt driven idea either but if the pump itself is reliable then I could get past the belt drive.
Thus far, the DCR seems to be a pretty solid success. That said the CP3 is the gold standard of light duty high pressure injection pumps, coming from a CR Cummins back in the day I do have a soft spot for them. Worst case, nice to know there are multiple CP4 alternatives on the market now.
Tuned
Joined: Nov 2016
Posts: 385
Likes: 116
From: Full time RVer
Ha ha ha, well said sir. FTE needs more of this.
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