2020 X15 400 SA

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Hauler2020, Jun 10, 2024.

  1. Hauler2020

    Hauler2020 Bobtail Member

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    Jun 2, 2024
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    I'm about to be in a 2020 truck with an X15 Cummins 400 SA. Rated at 400 HP with an automatic transmission. It says peak torque is 1850. I've heard it can't be turned up past 500 safely. I'm just trying to make sure before I go to spending money. 500 is fine with me, I just want to make sure I'm correct. Thanks.
     
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  3. Goodysnap

    Goodysnap Road Train Member

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    Jul 12, 2017
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    Go directly to a Cummins distributor with the engine serial number to inquire about horsepower increases. A lot of the x15 Economy engines are limited on uprates due to internal parts. There are also high uprate prices to cover any warranties that may remain. Get it in writing from an authorized Cummins distributor before you purchase.
     
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