2019+ RAM HD with failed CP4-2 IP to get CP3's

double post

It's possible a Ram endorsed CP4 to CP3 conversion is fake news, but what about the failures themselves? Have seen several reports of CP4 failures on Cumminsforum. One involved a 2020 Ram with 1,500 miles. BTW, there is some mention of a factory endorsed CP4/CP3 conversion in this thread. More fake news? I don't know.

cummins2014 wrote:

Flan wrote:
Sounds like Fake News to me. That being said there have been people who have put on a CP3 and have had no driveability issues, or codes set for that matter.

On the 2019-20 Ram 6.7 ???

correct. One company already has a retrofit kit out, another is not too far behind them.

BTW, you can still get the 2018 Cummins in the 2020. I think this is awesome and my dealer is equipping his trucks w the 2018 motor until he’s comfortable that the new Cummins has the bugs worked out.

Also I’m confident that Cummins will work this problem out in the best interests of the customer.

^ Whatthe heck are you talking about?

I call BS.....

While the CP3 pump has much greater volume, it cannot pump the fuel at as high of pressures as the CP4. This means that Cummins cannot increase horsepower and meet emissions at the same time. The CP3 can easily get you up to 500 rwhp all day every day, but it cannot do it and meet emissions.

In order for Cummins to increase horsepower and meet emissions, they had to go with a higher pressure pump. This is one reason why I which that Ram stop this pissing match with Ford, because I would much rather the engine be reliable than tow some number than I will never tow. If I want to increase power, I can do it after I buy the truck. The CP4 is is what you get for wanting Ram to continue this pissing match instead of focusing on reliability. So blame yourself for the CP4 if you are one that believes that "Ike times matter".

MikeRP wrote:
BTW, you can still get the 2018 Cummins in the 2020. I think this is awesome and my dealer is equipping his trucks w the 2018 motor until he’s comfortable that the new Cummins has the bugs worked out.

Also I’m confident that Cummins will work this problem out in the best interests of the customer.

You cannot get a 2018 CP3 motor in a 2019 or 2020. Whoever told you this is misinformed or lying to your face.

ShinerBock wrote:
I call BS.....

While the CP3 pump has much greater volume, it cannot pump the fuel at as high of pressures as the CP4. This means that Cummins cannot increase horsepower and meet emissions at the same time. The CP3 can easily get you up to 500 rwhp all day every day, but it cannot do it and meet emissions.

In order for Cummins to increase horsepower and meet emissions, they had to go with a higher pressure pump. This is one reason why I which that Ram stop this pissing match with Ford, because I would much rather the engine be reliable than tow some number than I will never tow. If I want to increase power, I can do it after I buy the truck. The CP4 is is what you get for wanting Ram to continue this pissing match instead of focusing on reliability. So blame yourself for the CP4 if you are one that believes that "Ike times matter".

industrial injection has a 10mm CP3 that comes with their conversion kit, and has EPA approval. Why wouldn’t Cummins be able to do it?

I’ve always thought a part of the change for Ram/Cummins is that the CP 4 requires less HP to drive at the higher pressures.

Flan wrote:

ShinerBock wrote:
I call BS.....

While the CP3 pump has much greater volume, it cannot pump the fuel at as high of pressures as the CP4. This means that Cummins cannot increase horsepower and meet emissions at the same time. The CP3 can easily get you up to 500 rwhp all day every day, but it cannot do it and meet emissions.

In order for Cummins to increase horsepower and meet emissions, they had to go with a higher pressure pump. This is one reason why I which that Ram stop this pissing match with Ford, because I would much rather the engine be reliable than tow some number than I will never tow. If I want to increase power, I can do it after I buy the truck. The CP4 is is what you get for wanting Ram to continue this pissing match instead of focusing on reliability. So blame yourself for the CP4 if you are one that believes that "Ike times matter".

industrial injection has a 10mm CP3 that comes with their conversion kit, and has EPA approval. Why wouldn’t Cummins be able to do it?

I seriously doubt the 10mm CP3 is EPA approved and can pass the same emissions certifications that a new truck does. In fact, I bet somewhere in a link to their CP3 conversion it says for "Closed Circuit Competition Only" just like this Industrial Injection LML CP3 conversion does....

LML Duramax CP4 to CP3 conversion kit with pump

I don't believe the standard (non-10mm) CP3 pump kit is EPA approved. Just because it works with factory fuel maps does not mean it is EPA approved. The CP3 is more than capable to reach the power numbers and fueling requirements of the CP4, it just can't do it and meet emissions like the CP4.