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Vladislav

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Posts posted by Vladislav

  1. My guess is the outside plate is aftermarket (repair-reinforcement). I saw many Superliner chassis and also R-models with Neway and have never seen any arranged that way. The inner plate (spicer) is the most probably factory. To compensate possible use of the inner rail. My 1988 R-model Neway arranged particulary. Single frame rail with two holes for the rod bracket attachment and 1/4" plate at the inside. ...With hard cracking near the bolt holes. So I'm looking for options for a "nice" fix. Probably will also fabricate an outer plate but less in size to look smoother. And I don't plan to carry loads by the truck.

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  2. Pre-war Mack BG (or BJ or so) was interesting and in restorable condition. At least as it seemed to me by the pics. Sure you can restore the most any truck no matter how hard it was ruined, just depending on the efforts and expences. But particulary that rig is quite rare and of not very complicated design.

  3. Mack changed the crank and other heavy loaded parts when they went to Maxidyne from ENDT673. Which was of Thermodyne family which was introduced to the market in 1938. Much higher torques produced by Maxidyne required much more strength of the engine components. I don't know when Econodyne was put on the scene, probably is was a kind of mod of Maxidyne engines but with more common fuel settings. 

    The difference was mostly achieved by different governing in the injection pump. Thinking about the shapes of the governor inside parts it looked to me like the governor had ability to push fuel rack at low revs so the engine would pull. Ok, I'm not almost sure on the physics but if you want torque, actually - forse, for a vehicle to pull load you need fuel to be burned. There's no magic in the world. So that fuel must be delivered into the cylinders. And if you don't tread the gas pedal hard but the truck pulls well it means fuel is supplied in sufficient quantity some how. To me it seems the governor is making the trick while you hold the go pedal relatively steady.

    The second big point (mentioned in discussions regarding Maxidyne engines) is the turbo. Definitely if you want to burn fuel you need air. More fuel - more air. So turbo must do its job. It was said Maxidynes had different turbo than Econodynes. Possibly. As of me I'd like to know what was principally different in them and how big that difference was. Since I read someone's posts from time to time when a certain common turbo was installed onto Maxi engine and against expectations of experts of the community the truck gets driving fine.

    Injectors could be different (and they're different) since the combustion process goes at different revs so optimal spray pattern is different too. Which could be achieved by different crack pressure. There also could be difference in the shape of cams of the pump cam shaft. Initial plunger speed may be different in different engines and the injection stroke may be longer or shorter providing different intensity of combustion. Timing angles are items from the same basket. So when you want a certain engine to be set for a certain specific performance many aspects may be performed. 

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  4. Just now, cruiseliner64 said:

    Our Cruiseliner has an EM6 300 HP.  I thought I read somewhere on BMT they went to 350HP or am I mistaken?

    Paul

    Mack went up to 2 valve E6-350 indeed. But those were not Maxidynes. Low torque curve was sacrificed for higher HP. And a bit higher highway fuel efficiency. I have that kind of engine in a MH of 1984.

  5. 21 hours ago, Mackman686 said:

    Hi Vladislav,

    Yeah not much we can do about the people in the world who stuff it up for the rest of us!! yes the twin steer axles and tandem drive axles (8x4) is very very common here and has been for a lot of years in every part of road transport with being able to get a decent payload with axle weights. that MH was on logs and towed a 3 axle and or a 4 axle trailer pull trailer which is still a combination that is still an everyday use and in the last 10 or so years they've added a 5th axle to the trailers for more payload.

    cheers Keegan  

    ultraliner 2.jpeg

    ultraliner.jpeg

    Two thumbs up!

    • Like 1
  6. 23 minutes ago, BOBWhite said:

    I see the jumper wires now, who knows what I was thinking! And everything would be 12 volt since both battery banks are grounded. The two solenoids are for key on and start. I've never been very good with these diagrams, at least there are no Diode or Resister alien symbols. 

     image.thumb.png.48817ffa4574933606b22ffd984c9a3f.png

    Two groups of batteries in parallel. Each one conteins two batts in series. If they're 6V two bring twelve V. Almost as Geoff said.

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