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Mark T

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Everything posted by Mark T

  1. Mark T
    I could be wrong on this, but I think some of the old Thermodynes had hollow crank throws. (along with no oilers) As the Maxidyne evolved and horsepower went up there was some kind of update that added bracing from main cap to main cap. So much got better and better over time. Another thing that was huge in accomplishing all this was higher injection pressure (made by a pump that could have a life)
  2. Mark T
    659
  3. Mark T
    (lol) I have a '21 Peterbilt with the same set up, except I use a 10 speed
  4. Mark T
    I had 2 MP7s one was a Maxidyne and one Econodyne. Far as I know it was only a software difference One was a 395 and the other a 405. Those little engines were sorta like you suggested about the V8 using everything for power. In my opinion ???? cubic inch for cubic inch ...not many run like them. (and yes I know they don't leave a trail of fire, but they're a tiny engine compared to even a 13 liter) and they're actually fairly close to the same displacement as a 237
  5. Mark T
    Live tandem twin screw. Little 34000 pound Eatons with the round housing I believe
  6. Mark T
    Multi speed transmissions gained popularity as axle ratios became faster. A truck with a 3.7 axle grossing 80K would have a hard time starting out on black top even with a 6 to 1 first gear in the transmission. Newer engines all made much more torque than engines common in the mid '60s
  7. Mark T
    Back to original question. Maxidynes didn't get their grunt from some mystery valves . 50 years ago, they engineered away lots of shifting, and now they do that with the M drive .
  8. Mark T
    Fuller jumped in on the concept. A PowerTorque Cummins worked with a five speed Fuller. Husky Drives and TO 95ALLs were made just for that. Of course that was years after Mack had a good foothold on the less shifting idea
  9. Mark T
    We all know the guy with the 3 year old truck that looks 30 😂 and they're getting more popular than ever cause that's about when good warranty runs out
  10. Mark T
    I think see'n how as that pickup is all dolled up and ready to go ? Might be a good vehicle to try a low altitude girl in a car picture
  11. Mark T
    IDK ??? I don't have to put much thought into a few old ten wheelers from NJ that were in pretty nice shape. Lots of those old big DMs and Autocars ? they weren't exactly a rarity , and some were pretty well preserved.
  12. Mark T
    All the work is done on top of the piston ( timing injection pressure , matching of turbo cam and fuel delivery ) and more important than any of it ? Someone figured out how to do it for a reasonable amount of money . Think many people realize one of those old constant torque Maxidynes were never anything bigger than what would be called an 11 liter today ?
  13. Mark T
    Years ago , an old fella by where I live had a truck similar to this . I was way to young to understand ( or appreciate ) what I was looking at. I'm amazed at how much has changed on trucks, and how much really hasn't.
  14. Mark T
    I can't believe how much the front springs look like something so much newer .
  15. Mark T
    It kinda looks like the same red as the tractor you drove ??
  16. Mark T
    That probably was a dump truck at one time.
  17. Mark T
    Timmy set you right up. 👍
  18. Mark T
    If the spring in it is that busted, it likely doesn't have much fight left in it. !!! but still gotta be careful !!!
  19. Mark T
    Now I feel like a pecker head (lol) Thanks for posting. It's an interesting truck, and I doubt it's only me who thinks that.
  20. Mark T
    This guy's a tease....he's making us wait way too long for more info and pictures of this truck
  21. Mark T
    vent line is all
  22. Mark T
    They'd make it much easier to get the weight on the steering axle if used in dump application.
  23. Mark T
    Congratulations , you scored a nice Superliner there.
  24. Mark T
    Something's fishy about that truck. Title says it's 2 axle . It really doesn't look to be in the worst of shape ??? Maybe it was a glider
  25. Mark T
    The truck's power divider could just be worn ?? I think on older Mack rears only the 200 series could be made with a cam and wedge type locker (like the power divider) in the center section.

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