Which performance tuner should I get?

Discussion in 'Ask An Owner Operator' started by visionarygvp, Jan 15, 2022.

  1. visionarygvp

    visionarygvp Light Load Member

    Mar 21, 2018
    Atlanta, GA
    I’m currently leasing a brand new 2022 KW T680, it came governed at 70mph, the company I am contracted and leasing through doesn’t care if I tune up the speed, the manufacturer had the speed set to 70 and they’re just not paying for it to be bumped up.

    Does anyone know which tuner will work for a Paccar MX-13 engine on a 2022 KW T680? From what I researched Big Bully won’t work because the truck model and year doesn’t fall within the covered specs for the tuner.
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  3. blairandgretchen

    blairandgretchen Road Train Member

    Dec 9, 2011
    South west Missouri
    Is there any issues with warranty if a tuner is installed?
  4. Capacity

    Capacity Road Train Member

    Jul 28, 2019
    Neenah Wi
    Who did you lease it from , my last brand new lease unit would walk the dog , all the megas used to whine , out west.
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  5. 062

    062 Road Train Member

    Oct 20, 2013
    If they don’t care, then take it to a dealer.
    Manufacturers are making the computers harder to alter now.
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  6. ibcalm19

    ibcalm19 Road Train Member

    Nov 30, 2015
    You don't need a tuner to adjust the speed. You just need KW T680 software program any KW dealership can do that for I say $100+
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  7. NYStarcar

    NYStarcar Light Load Member

    Oct 6, 2020
    If the ECM is password locked and you don't have the password a tuner or power programmer won't do anything for the truck. Needs to be unlocked and uprated by a qualified shop.
    visionarygvp and JoeyJunk Thank this.
  8. AModelCat

    AModelCat Road Train Member

    Jul 7, 2015
    Sounds like a great way to void your warranty.

    Better off getting written permission from the truck's owner and getting the governor changed at the dealership. Probably cheaper too.
  9. Arctic_fox

    Arctic_fox Road Train Member

    Sep 16, 2016
    Yup not to mention a lot of so called "tuners" arent all that great. Ive seen lots of people here mad their truck blew up after a tune. And MX13s are even more picky then most engines to begin with which makes things even harder to futz with. With the truck being a 22 just see the dealer and uprate it.

    If your trying to boost the horses thata a whole new can-o-worms and there is a LOT more to it then a custom tune.
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  10. Long FLD

    Long FLD Road Train Member

    Mar 4, 2015
    If it’s a 2022 then it’s the latest round of greenhouse gas motors and from what I’ve been told there’s not much you can do to them once they leave the factory. When I got my new 579 the dealer set the speed, I’m not sure if they’re allowed to change it once it’s set on these new ones.
    visionarygvp, Oxbow and JoeyJunk Thank this.
  11. JoeyJunk

    JoeyJunk Road Train Member

    Dec 31, 2010
    Washington, PA
    My buddy bought a used 2018 or 2019 579 last year. MX13. He was disappointed with the power. The dealer never changed the parameters that the previous tanker company had set. It was an easy fix and everything improved with performance, power, MPG, etc. Maybe just have this checked first and see if you are happy with it.
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