D13 Variable HP, adjusting HP

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by JPS1, Jan 1, 2021.

  1. JPS1

    JPS1 Bobtail Member

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    From what I've read, it appears that engines can be reprogrammed to various HP/torque ratings.

    If one were in the market for a used truck, would a used truck set at the lowest HP/torque mean that the engine has been "under powered" and a better alternative than the same engine at full HP/torque?
     
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  3. AModelCat

    AModelCat Road Train Member

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    Generally speaking, company trucks are castrated because many drivers would destroy the truck if given 500-600 ponies to play with.
     
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  4. 86scotty

    86scotty Road Train Member

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    That's arguable, it all depends on who owned the truck and how it was used.

    Mine was a fleet truck for 500k at a 425/1500. They day I bought it I had it turned up to 500/1750. Cost me a grand at the Volvo dealer. I know that my fleet truck was an OTR truck hauling the same stuff I am, up to 80k dry van. So, the truck was certainly driven harder because it had less power.

    Make sense?
     
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  5. 6cuda6

    6cuda6 Light Load Member

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    Sometimes they also detune them in order to save fuel and/or parts....i've even seen different tunes for when on cruise control verses not...
    Personally i dont think it matters if its detuned or not but what i would be more concerned about is if it was over tuned [ie: motor sticker rated for 450/1500 and is hopped up to 600/2000 when the max OEM spec available for that motor variant was 500/1800]
     
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