CP4 to CP-ISB21S3 (revised CP3) change for 2021 6.7L Diesel Trucks -- Merged Threads

[NordicNevs]

What is the average installation time for someone with decent mechanical skills?

Also, how does this compare with S&S conversion? How is the pump modified, etc?

If you prefer to discuss in PM please send me a message

Thanks

We can discuss over PM but my kit just shipped. I have been watching and reading the instructions but I’ll start a thread as well not to detail this one. Sound good?


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[NordicNevs]

Here is the thread for those who which to follow

My industrial injection CP3 shipped!!!

Industrial Injection CP3 pump and installation and follow on use!

NOTE: CP3 write up ends at post 90. Beyond that it’s conversation and follow on reporting for use. Hey everyone!!! So there has been a lot of talk about the CP4s and the CP3 release for 21 model year but instead of getting all wrapped around the axles and the risk of all the headaches, I...

r.tapatalk.com

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[Relentless]

We can discuss over PM but my kit just shipped. I have been watching and reading the instructions but I’ll start a thread as well not to detail this one. Sound good?


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Awesome! Thank you, I'll be looking forward to following along

 

[saltman]

How does that 21 HO drive!?

 

[g00fy]

Don't know if this was posted yet, but here's the links to the new injector pump and adapter on allmoparparts.com

2021-2024 Ram Fuel Injection Pump 68533241AA | All Mopar Parts

2021-2024 Ram part # 68533241AA - Fuel Injection Pump

parts.allmoparparts.com

2019-2024 Ram Adapter 68444260AA | All Mopar Parts

2019-2024 Ram part # 68444260AA - Adapter

parts.allmoparparts.com

Somebody posted the part numbers on a cummins Facebook group a little while ago.

 

[red]

Thanks for the links to the parts,
I wonder if these parts are plug and play or if the truck would need to be re-flashed after installation.

 

[mostcorey95]

Thanks for the links to the parts,
I wonder if these parts are plug and play or if the truck would need to be re-flashed after installation.

The connector is different and I think the gear is different also. Since cp3 is not a timed pump and the cp4.2 is and they used a key way to align it. So you may need the other little pieces to so the gear is a tighter fit. The cp3 conversion kits are plug and play.

 

[Brutal_HO]

Don't know if this was posted yet, but the here's links to the new injector pump and adapter on allmoparparts.com

2021-2024 Ram Fuel Injection Pump 68533241AA | All Mopar Parts

2021-2024 Ram part # 68533241AA - Fuel Injection Pump

parts.allmoparparts.com

2019-2024 Ram Adapter 68444260AA | All Mopar Parts

2019-2024 Ram part # 68444260AA - Adapter

parts.allmoparparts.com

Somebody posted the part numbers on a cummins Facebook group a little while ago.

Was this supposed to be some attempt to show a direct swap option?

That part is just the pilot adapter.

The bolt pattern to mount the CP3 is different which is why the II & SS conversion kits include a front cover adapter.



The injection pump gear part numbers are also different 2020 to 2021.

 

[Ostracize]

Has anyone found a direct spec comparison between the "new" Cp3 and the Cp4(.2)?

 

[g00fy]

Was this supposed to be some attempt to show a direct swap option?

That part is just the pilot adapter.

The bolt pattern to mount the CP3 is different which is why the II & SS conversion kits include a front cover adapter.

View attachment 9939

The injection pump gear part numbers are also different 2020 to 2021.

Just posting the part numbers for everyone's information, what they do with that information is their business.

 

[delmoniCO]

Correct


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No tune for both the original asym CP4 and the replacement dimpled symmetrical CP4? Mopar has two tunes depending on the pump.

 

[NordicNevs]

No tune for both the original asym CP4 and the replacement dimpled symmetrical CP4? Mopar has two tunes depending on the pump.

I was referring to the CP3s by S&S or II


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[mostcorey95]

I was referring to the CP3s by S&S or II


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No tune is required

 

[NordicNevs]

No tune is required

SMH yes this is what I was saying

There is No tune required if you purchase the drop in (both S&S and II) CP3 conversions.


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[mostcorey95]

SMH yes this is what I was saying

No tune, drop in for both S&S and II CP3 conversions.


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Sorry It’s been a long day so far. I wonder what it would take to use a factory cp3. And not have any lights or anything

 

[NordicNevs]

Sorry It’s been a long day so far. I wonder what it would take to use a factory cp3. And not have any lights or anything

All good bud no worries here.

Honestly it would probably be an ECM flash at most. The factory CP3s down require timing but there might be requirements for fuel demand that would be different than the CP4. That said, the current aftermarket options are drop in so it must be minor.


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[delmoniCO]

SMH yes this is what I was saying

There is No tune required if you purchase the drop in (both S&S and II) CP3 conversions.


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Yeah I got that. Mopar has two tunes for the CP4, depending on if your truck has the symmetrical or asymmetrical I pump. Are the "no tune required" drop in CP3 kits made compatible with both factory mopar tunes? One might think that they designed these drop in kits for the initial asymetrical tunes and possibly the trucks with the symmetrical CP4 MIGHT actually need a tune...

 

[Epsilon Plus]

Yeah I got that. Mopar has two tunes for the CP4, depending on if your truck has the symmetrical or asymmetrical I pump. Are the "no tune required" drop in CP3 kits made compatible with both factory mopar tunes? One might think that they designed these drop in kits for the initial asymetrical tunes and possibly the trucks with the symmetrical CP4 MIGHT actually need a tune...

Interesting point. The tunes are said to address "NVH". I wonder what, electronically, would contribute to a mechanically driven pump increasing NVH. NVH is also the concern of OEMs and not aftermarket though. Remember that thread on here about a tick from a CP3 converted truck? Maybe it's related.

 

[NordicNevs]

Interesting point. The tunes are said to address "NVH". I wonder what, electronically, would contribute to a mechanically driven pump increasing NVH. NVH is also the concern of OEMs and not aftermarket though. Remember that thread on here about a tick from a CP3 converted truck? Maybe it's related.

The ticking was due to a faulty FCA and once replaced they have been solid.


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[regal2800]

The ticking was due to a faulty FCA and once replaced they have been solid.


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Is the FCA part of the TSB? If the pump has the ticking, does it qualify for the TSB fix?