12.7 Detroit need a new turbo (upgrade?), hauling light and best mpg?

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Green461, Mar 24, 2020.

  1. Rideandrepair

    Rideandrepair Road Train Member

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    I believe it’s 4912. I’d have to check 1999 BK engine
     
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  3. DDguy

    DDguy Light Load Member

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    If you had the Serial number and providing the engine has the cam from stock i can look it up
     
  4. allisonisatranny

    allisonisatranny Light Load Member

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    You don't have to drag race, but at least accelerate reasonably. There's nothing worse then getting behind a driver doing 30 MPH on the on ramp, because he is either eating a sandwich, or just driving like a fool and accelerating super slow for either fuel economy or....


     
    Rideandrepair Thanks this.
  5. Rideandrepair

    Rideandrepair Road Train Member

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    You have to consider, being Loaded heavy, hitting every gear just right, not tearing up things. Big difference from being light, and with an automatic. They pass Me all the time coming out of the scale. Takes a while to get mine wound up. Then I pass them. Lol
     
    nikmirbre and Brettj3876 Thank this.
  6. Brettj3876

    Brettj3876 Road Train Member

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    I take off slow and steady like James if im light or heavy. Macks were never fast off the line to being with. Once i get moving you won't see me again
     
    Rideandrepair Thanks this.
  7. ihc4b

    ihc4b Bobtail Member

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  8. Alanbuure

    Alanbuure Bobtail Member

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  9. Alanbuure

    Alanbuure Bobtail Member

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    Hey guys need some help i just installed turbo from k31 to 171702 do i need tune or just fine thanks
     
  10. DDguy

    DDguy Light Load Member

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    did this engine have a previous tune or is it stock program ?
     
  11. Alanbuure

    Alanbuure Bobtail Member

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    I just bought the truck three months ago and ididnt know
     
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