Big Cam 400

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Chris M., Apr 7, 2012.

  1. Chris M.

    Chris M. Light Load Member

    119
    75
    May 27, 2010
    Tater State
    0
    Okay so i am not exactly new to the scene but i am slightly stumped. Im looking to buy another truck that has a Big cam 400 cummins. The truck is 80s 359 and a 9 speed. I dont know what the diffs are. I am just a little sceptical on this motor trans combo. Some general input would help. I haul western-midwest states pulling a reefer and maybe jumping into the curtain van world. I do go up White Bird in Idaho a lot so (way cooler than Cabbage and Sherman) pulling power is fairly important. I understand that this in not a fuel efficent motor but general mpg. Im not replacing this truck for the other, just another truck for me. There is tons of information on this motor which is great but most of it is on mods and trick stuff.
     
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  3. DieselDummy

    DieselDummy Light Load Member

    173
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    Apr 1, 2012
    Willet,NY
    0
    Biggest thing you wanna get is the engine serial number, this will tell you alot about the motor. Another is the CPL# which you will find out when looking up serial#. Ususally the CPL will also be stamped on the pump tag on the upper left.
     
  4. DieselDummy

    DieselDummy Light Load Member

    173
    62
    Apr 1, 2012
    Willet,NY
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  5. DieselDummy

    DieselDummy Light Load Member

    173
    62
    Apr 1, 2012
    Willet,NY
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    ImageUploadedByTapatalk1333885185.683371.jpg
    Pump tag


    ImageUploadedByTapatalk1333885209.943840.jpg
    Engine serial number is stamped on block, if tag on front cover is gone.

    You ca sign up on Cummins quick serve for a free account and look at up to 5 serial numbers before you pay.
     
    123456 Thanks this.
  6. rjones56

    rjones56 Heavy Load Member

    824
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    Jul 15, 2008
    staunton va
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    Run under normal conditions-probably 5 t0 5.5 mpg.
     
  7. Chris M.

    Chris M. Light Load Member

    119
    75
    May 27, 2010
    Tater State
    0
    Awesome thanks for the replys. I should be able to get the numbers later today along with the pump
     
  8. ohio_redneck75

    ohio_redneck75 Light Load Member

    128
    51
    Sep 27, 2010
    coshocton,ohio
    0
    i have a 400 bc in my 89 volvo lots of motor mods done to it. the average mpg i have been getting is 6 to 6.5. its a higher rpm motor than the newer cummins 1700 to 2200 is the sweet spot with mine
     
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  9. DieselDummy

    DieselDummy Light Load Member

    173
    62
    Apr 1, 2012
    Willet,NY
    0
    Just finished up my dual feed line and fuel pressure gauge.
     
  10. Crusty

    Crusty <b>Just Plain Crusty</b>

    345
    140
    May 29, 2010
    Canton, GA
    0
    Long ago in a galaxy far away there were cummins diesels fondly refered to as 'shiny 290's'.These motors were high rpm motors that shifted around 2700 rpm. Not a typo. Twenty seven hundred. They got around 4 mpg. Mack low rpm models around the same HP/torque were getting TWICE that. (cut back and dogged out, but they did it) Not to be out done, Cummins cane out with their 'big cam' series with 9 speeds. Much lower power band = fuel savings. That is the extreamly short answer.
     
  11. cjreckart

    cjreckart Bobtail Member

    22
    0
    Dec 3, 2009
    Uniontown Pa
    0
    Any way you could take a pic of ur dual line and your fuel preesure line. Im new to these old motor and not sure were to tap in for either one .
     
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