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just saw a cp4 tear down video and the author indicates it was reported to him that there is a new style co4 indicated by one large dot where in the photo you see 6 small ones.
it’s not clear what the improvement is....we would hope that the roller bearing cup is keyed so that it does not rotate ....but don’t know.
apparently 2019’s and earlier have the old style co4 , and depending on supply exhaustion , 2020, could have the new style. But so far, no one has advertised a cp4 change in 2020 in actual production builds.
unless you do a cp4 bypass or an energy metering valve upgrade, it is unlikely that you would be able to see the location that has the small dots vs the large one.
something for us to watch out for as we do our tear downs for co4 by pass or metering valve upgrade.
does anyone have and details on this possible cp4 upgrade?
I know in 2017 the strike of the roller bearing slider was changed and the cam lobe is more aggressive...could be a misunderstanding on what these dots represent and may actually indicate stroke differences.
So the changes they are talking about in the other thread is a less aggressive cam lobe.
which is interesting becuase the love change was to keep up with power needs
might have been better to go the route of something line the 55 kit, which is a pump head plunger replacement that gives you 55 percent more fuel flow.....vs s reving around with the csm which already has problems.
was hoping for a keyed roller housing so that the roller would stop spinning off axis.
I think my roller do some axis spinning when I first power up the truck and after a few minutes the fuel pump gets quiet.
Do you know if anyone has checked with a machine shop and see if a key and slot can be added to the CP4?
Originally Posted by speakerfritz
i wonderd the same
@speakerfritz as I asked on one of your other threads, it really seems like the aftermarket would come up with something if it is really as big of an issue as the internet makes it out to be. Ford has been using the CP4 for 10 years now, and generally, if there is a real need for something the aftermarket is pretty quick to figure something out and run with it. As @sPickins asked, it seems like a good machine shop could do this relatively easy. IDK, maybe it can’t be done. In my world, the world *can’t* was just a challenge..........oh, yeah? Let’s see about that!
Seems to me the pistons and bore should not be round to keep the roller bearing from spinning to a 90* orientation after watching this AGAIN: https://www.youtube.com/watch?v=nPFPf2EpxkE
that’s a good point
Oval shape would work better than a keyed solution.
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