Detroit 8v92 with allison automatic

Discussion in 'Trucks [ Eighteen Wheelers ]' started by turboguy, Aug 21, 2016.

  1. AModelCat

    AModelCat Road Train Member

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    A 4-53T in a slammed Chevy S10 would be awesome.
     
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  3. Rocking 4M

    Rocking 4M Bobtail Member

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    Used to drive a Prevost bus with an 8V92 and an Allison 755 automatic transmission (5 speed). It weighed in at 45,000 lbs. The powertrain did fine and was very smooth. I don't know what it would be pulling a gross weight of 80k. The biggest lesson I learned with the 8V was they don't like to get hot. If you are serious spend the money to have the radiator looked at and make sure the cooling system is in good shape. I learned the lesson the hard way and blew an 8V pulling hills in New Mexico. It was because someone had run regular antifreeze in the radiator and it was about 70% clogged.
     
  4. Rocking 4M

    Rocking 4M Bobtail Member

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    Mtoo is right. The jakes are not the greatest in the world, but manageable if you drive reasonably. Mileage was about 4.7 to 5.5 depending on speed and the wind. Nothing like driving a brick into a stiff headwind.
     
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  5. Yves kanevil

    Yves kanevil Medium Load Member

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    Silver 92s my dad had were terrible on fuel. But never slobbered much oil. I think the key to keeping the oil in the pan was to drive the thing like it was the red headed step child. If you weren't mad at it. You weren't driving it right
     
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  6. swaan

    swaan Road Train Member

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    Silver 92 was a great engine.
    I had a 475hp silver when i first started driving. Yeah it was not great on fuel but ran nice . Very smooth engine .
     
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  7. Yves kanevil

    Yves kanevil Medium Load Member

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    And nothing sounds sweeter than a silver at 2200 rpm
     
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  8. mtoo

    mtoo Road Train Member

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    Yes and no engine fan clutch back in the day. Lots of noise @2200 rpm
     
  9. Aking

    Aking Bobtail Member

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    Jun 17, 2018
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    Detroit diesels were a two stroke diesel and designed to work hard from the start, and cannot stand excessive idling which will glaze up the crosshatch grooves in cylinder liners. That will then lead to slight overheating and loss off oil control, seals will get cooked and the engine will start to leak oil all over.
    An 8v92 should get about 1.75 km per liter or 5 miles per gallon in australian terms as a US gallon is a smaller quantity. I've known guys that have run them in trucks and buses and don't leak any oil and be good on fuel. It's these idiots that don't take the time to understand how the engine should be run and operated that's the problem always was.
     
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  10. Aking

    Aking Bobtail Member

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    Detroit diesels in australia were very popular in trucks and buses they were an engine designed to work hard from the start. An 8v92 can get 5 miles per gallon as a semi grossing about 42 ton or 90 000 pounds
    with exceptional performance great trip times. A 6-71 can do 6.5 mpg with 35 or 38 ton gross semi. The US gallon is smaller 3.8 against 4.55 Many Detroits did a million miles before an overhaul.These engines cannot stand excessive idling,light loading and will glaze up the crosshatch grooves with thickened oil which will result in all sorts of oil slobbering problems because they never ran the engine correctly in the first place.
     
  11. Slowmover1

    Slowmover1 Road Train Member

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    Yeah, you never really think about interstate motor coaches being “fast”, but that 8V92/Allison combo could really move. And it sounded right.

    So long as I was allowed to to shoot the passengers who aggravated me, I could see running one of those.
     
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