ShinerBock wrote:
FishOnOne wrote:
ShinerBock wrote:
LOL, that is all new CP4 pumps and is one reason why it puts out higher pressure than the CP3 and even gen 1 CP4's on the older Ford's and GM's. I know Lavon(he actually made one of my tunes for my truck) and I know he hasn't had a 2020 PSD in his shop yet to even compare the two to know whether or not it turn more than the new 2020 PSD. So he is comparing to older CP4's which maxed out at 29,000 psi and Ford used every bit of that pressure(to make more power). The old CP3 Cummins maxed out at 29,000 psi, but Cummins only used 26,000 psi.
It also appears that I was incorrect on it being a CP4-27. From the looks at it from Bosch's website, the Ford and Cummins is the CP4-25 variant which maxes out at 2,500 bar or 36,000 psi. However, Cummins only utilizes 29,000 psi from the pump and Ford uses all 36,000 psi of it's max pressure. The CP4-27 is for larger engines.
LINK
Cummins increased the rpm of the CP4.2 to increase fuel volume in a 29k psi configuration compared to the Ford and GM which ran at a lower rpm. Also I'm pretty sure the 2020 Power Stroke didn't increase the rpm of the CP4.2.
So you are basing on this assumptions(aka blind faith) from what Lavon stated in his video, and not verified facts. You are assuming that Lavon is talking about all CP4 pumps from 2011-2020, and not just the gen one that both GM and Ford shared. I am willing to bet that he is only comparing the gen 2 CP4 on the Cummins to the gen 1 versions of of the CP4 found in the 2011-2014 Fords and 2011-2016 GMs. The Gen 2 had a longer stroke (which requires it to spin faster) which Ford went to in 2015. In fact, I needed to call him about a shift revision for my tune anyways so I can verify tomorrow.
Good grief... spin it however you like.
