Cummins PT pump is at the pump shop.

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by mile marker 27, Jun 29, 2022.

  1. mile marker 27

    mile marker 27 Medium Load Member

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    Ok, the pump and injectors are at the shop. I went over with the guy what I’m trying to do, as far as the 290 CPL 217 build, to a 350 CPL 160 and a timing up grade from -.50 to -.35. He was familiar with what I was talking about and he had a CPL manual as well. I asked him if I could safely go 10% more than 350hp, he said “10-15% more would be fine”. It currently has a #22 button in the pump. What do you guys think?
     
    OLDSKOOLERnWV Thanks this.
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  3. mile marker 27

    mile marker 27 Medium Load Member

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    One more thing can I or should I reuse the exhaust, intake and injector push tubes? They all look good.
     
    OLDSKOOLERnWV Thanks this.
  4. Inderjit

    Inderjit Medium Load Member

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    Use a small hammer and give each push tube a light tap. It should make a ringing sound they should all sound the same. If any make a dull thud they are full of oil and one of the ends is loose or they are cracked. If they pass the ringing test use them over again.
     
  5. OLDSKOOLERnWV

    OLDSKOOLERnWV Captain Redbeard

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    This…… ^^^^^
     
  6. OLDSKOOLERnWV

    OLDSKOOLERnWV Captain Redbeard

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    If it’s setup properly you should not have any issue. But still pay attention to your gauges.

    My engine is built to CPL 625 (400) horse, but the pump is set to X 100%. Plus other little modifications, but the key is watching those gauges….!
     
    AModelCat, Catmando and mile marker 27 Thank this.
  7. mile marker 27

    mile marker 27 Medium Load Member

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    He stated that, “a 17 or 15 button would probably be sufficient”.
     
  8. OLDSKOOLERnWV

    OLDSKOOLERnWV Captain Redbeard

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    What is being done to the injectors? Rebuild or….?
     
  9. mile marker 27

    mile marker 27 Medium Load Member

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    Built to the injector that the 160 CPL suggests.
     
  10. OLDSKOOLERnWV

    OLDSKOOLERnWV Captain Redbeard

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    So install a different button and build injectors to stock specs of the CPL 160….?
     
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  11. Inderjit

    Inderjit Medium Load Member

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    If you are going with CPL 160 injectors and pistons I would recommend timing it at .041"
     
    mile marker 27 Thanks this.
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