Cummins NTC 290 inframe build

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

  1. OLDSKOOLERnWV

    OLDSKOOLERnWV Captain Redbeard

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  3. OLDSKOOLERnWV

    OLDSKOOLERnWV Captain Redbeard

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    Have you thought of building it back to a 335? My 1st truck had a warm 335, it did pretty good….
     
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  4. mile marker 27

    mile marker 27 Medium Load Member

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    Yes, a 335 is definitely a consideration. There’s CPL’s, 0174, 0197 and 0318. Those are all 335’s with matching cam and non aftercooled.
     
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  5. OLDSKOOLERnWV

    OLDSKOOLERnWV Captain Redbeard

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    If my memory is correct….. the 350 came to be from add ons to a 335….
     
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  6. mile marker 27

    mile marker 27 Medium Load Member

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    So, it seems I need to pull the cam followers off to see what gasket is used?
     
  7. mile marker 27

    mile marker 27 Medium Load Member

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    I’ve got a guy a couple miles from me who has a big truck salvage yard. Been in the business his whole life and actually put this 290 in the truck years ago, in replacement of a 8v71. He told me that he wouldn’t mess with adding an aftercooler, as I wouldn’t gain much. He stated the cam is the limiting factor on those engines. Any truth to that?
     
  8. mile marker 27

    mile marker 27 Medium Load Member

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    You point me to what CPL I need and can I go 10% above that?
     
  9. mile marker 27

    mile marker 27 Medium Load Member

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    DC6B1472-2ECE-453C-8961-3A91ADBA01E9.jpeg D943F511-17F6-49D0-8C07-219372B413AD.jpeg
    Here’s a pic of the cam follower.
     
  10. Inderjit

    Inderjit Medium Load Member

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    CPL #s 0021 and 0160 were good small cam NTC 350 engines. Timed at -.041"
     
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