Truckers Report Jobs

Find Trucking Jobs

Company Driver Company Driver Dry Van Dry Van Flatbed Flatbed Refrigerated Refrigerated Specialized Specialized Owner Operator Owner Operator
More Trucking Job Searches ⌄ Fewer Trucking Job Searches
⌃

C15 acert 625

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by E.P., Mar 8, 2023.

  1. Mar 8, 2023 #1
    E.P.

    E.P. Bobtail Member

    5
    0
    Dec 28, 2021
    Georgia
    0
    I had my c15 acert rebuilt by caterpillar. It was a 550 hp and they rebuilt it as a factory 625 hp. That was around 850,000 miles ago! Now it is time to rebuild it again. I know that it has 17:1 compression now instead of 18:1. The turbos are a little bigger also from what I understand. I want to go to 16:1 compression. My question is ... are the pistons in a 625 bigger? Is the stroke different? Or is the difference between the two just in compression and tuning? I want to put the IPD piston kit in it and the IPD fire ringed head on it also. Any info would be greatly appreciated!! Thank you in advance!!
     
    E.P., Mar 8, 2023
    E.P., Mar 8, 2023
    #1
  2. Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.

  3. Mar 8, 2023 #2
    HoundDog7

    HoundDog7 Light Load Member

    185
    957
    Oct 7, 2022
    Kansas
    0
    To get the 16:1 pistons, you need the Cat industrial cylinder pack num er OR7172. If you're wanting just the Cat 16:1 piston number itself, it is 3466616. You will also need to change the piston cooling jet for the 16:1 to Cat number 2791152. Good luck
     
    HoundDog7, Mar 8, 2023
    HoundDog7, Mar 8, 2023
    #2
    Jubal Early Times Thanks this.
  4. Mar 8, 2023 #3
    ‘Olhand

    ‘Olhand Cantankerous Crusty

    6,647
    15,955
    Jan 18, 2011
    0
    IMHO if you’re doin another complete rebuild....single turbo it
    You’ll be a lot happier
     
    ‘Olhand, Mar 8, 2023
    ‘Olhand, Mar 8, 2023
    #3
  5. Mar 8, 2023 #4
    Magoo1968

    Magoo1968 Road Train Member

    2,017
    5,395
    Mar 18, 2021
    St Malo mb
    0
    Sounds like last rebuild was good if a high horsepower lasted that long .
     
    Magoo1968, Mar 8, 2023
    Magoo1968, Mar 8, 2023
    #4
    Oxbow and BoxCarKidd Thank this.
  7. Mar 27, 2023 #5
    E model Cat man

    E model Cat man Light Load Member

    79
    72
    Jun 10, 2014
    Northern Maine
    0
    Unless you plan to delete the VVA'S And get it returned I wouldn't change the compression ratio... You will loose a good bit of power and economy if you just drop the compression ratio without deleting the VVA'S. The effect they have on the dynamic compression ratio is equivalent to 2 points of compression and that's the reason the accerts have a higher compression ratio to start with. If you drop it to 16:1 and leave the VVA's intact your going to hate it .. now if you would like to retune and it for sure was updated to a 625 the right way which requires a camshaft and 10r3261 injectors then I could hook you up with a nice VVA OFF file for your 16:1 625 and keep your compounds.. just putting a 550 brake saver file in it with the 625 cam and injectors work excellent without deleting the VVA'S.
     
    E model Cat man, Mar 27, 2023
    E model Cat man, Mar 27, 2023
    #5
    bjytech Thanks this.
  • Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.