Thinking on a New T680

Discussion in 'Kenworth Forum' started by cgarys, Apr 21, 2019.

  1. BCV

    BCV Light Load Member

    Joined:
    May 26, 2018
    Messages:
    233
    Thanks Received:
    436
    0
    Get it loaded. Those trucks have a ton of storage. The fridge pays for itself by not eating all that fast food crap. They got a upgrade stereo system that rocks too... It's the little things that make it more enjoyable throughout the daily grind.
     
    x1Heavy, KB3MMX and cgarys Thank this.
  2. Kshaw0960

    Kshaw0960 Road Train Member

    Joined:
    Jun 17, 2018
    Messages:
    1,581
    Thanks Received:
    5,023
    0
    I would get lowpro tires. Proven better fuel economy since there’s less tire mass and the side wall is thinner so it doesn’t flex as much which means it has lower rolling resistance. I wouldn’t get the swivel seat either but the table is pretty awesome.
     
    cgarys Thanks this.
  3. KB3MMX

    KB3MMX Road Train Member

    Joined:
    Dec 29, 2014
    Messages:
    3,069
    Thanks Received:
    2,589
    Location:
    Orrstown, PA
    0
    I'd go 500/1850@1000rpm X15-E , better fuel economy and pulls down farther than the "Performance" version with same Tq but at higher rpm.
     
    x1Heavy Thanks this.
  4. x1Heavy

    x1Heavy Road Train Member

    Joined:
    Mar 5, 2016
    Messages:
    34,017
    Thanks Received:
    42,135
    Location:
    White County, Arkansas
    0
    I would be very cautious asking for horsies or in this case Oxen to keep moving at 1000 RPM. There has been only two engines in my time that would not quit until around 900 give or take 50 depending on which of us was driving them.

    It's hard on the pistons to burn at 1000 or lower. It's also too close to a point at which it must reject moving forward and change to stalling/bucking you.

    Maybe a slightly higher range gearing at 3.55 will help you here. Less strain on a engine that can lug down to 1000. Particularly if you plan on mountain work.

    I am trying hard not to flip flop here. Everything has a sweet spot in trucks if they are built right for the job you intend to do with them. I cannot imagine 3.55 or so gearing will allow you to cruise at say 75, maybe that is where your transmission fits in this picture, two or more overdrive gears. I loved my 13's an 15's but for you I think you might want to consider 18. And if you can get several od's out of them maybe go with 3.45 or a touch lower So you can when on the flat get up and run without gulping all of your fuel tanks.
     
  5. KB3MMX

    KB3MMX Road Train Member

    Joined:
    Dec 29, 2014
    Messages:
    3,069
    Thanks Received:
    2,589
    Location:
    Orrstown, PA
    0
    After my experience with paccar recently...

    I would certainly not recommend any right now.... at least until the plant production slows down a little bit and they pay attention to what they're doing !!!