1969 383 crankshafts: cast or all forged

Big Block A body Tech

  1. fratzog lover

    fratzog lover Well-Known Member

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    Did any 1969 383 engines come with cast cranks?
     
  2. EL5DEMON340

    EL5DEMON340 Well-Known Member

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    I think all 383's were forged
     
  3. Princess Valiant

    Princess Valiant Duster specialist FABO Gold Member

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    most 71 had cast....one year only They were not usually drilled for a speed and create a huge headache to get them drilled and to get a flywheel balanced to them.

    I ran into this when I pulled a 383 from a 71 Newport. in the end it was just easier to swap the crank out with an older one and that is how I run the engine now with a 69 forged crank that was factory drilled for a 4 speed.

    71 was also an odd year for the 383 because the horsepower ratings took a nose dive and there are a number of small differences. Of course 71 was the final year for them as they disappeared to be replaced by the 400 starting in 72.
     
  4. Rocky_JS

    Rocky_JS 'cuda

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    69 383 should be forged, but if ever changed/rebuilt it could be cast 400. Do you have a casting number from the crank? That will tell you.
     
  5. fratzog lover

    fratzog lover Well-Known Member

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    This is a 69. the casting date is 11-15-68, 24681308. What concerns me is the pad by the distributor is stamped e 383 followed by 11 252.Does the "e" designate a cast crank? I didnt think cast 383 cranks began production till 1971.
     
  6. fratzog lover

    fratzog lover Well-Known Member

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    Mopar1us.com claims 69-71 2 barrel 383's were cast. Its going to be a street build anyway, so its not the end of the world.
     
  7. adriver

    adriver Blazing Apostle

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    Are you sure 69 2 barrel would be cast?
    I've got a 69 2 barrel and I'm counting on it being forged if I rebuild it.
    The dampener seems to indicate it is forged. Mine has a small dampener which appears to me to be a forged dampener.
    71 2 barrel being the exception to 383s with a cast crank.


    http://www.moparts.org/Tech/Archive/motor/36.html
    Big Block Crankshafts Dampers
    Part# Application
    2658457 1958-1971 All B & RB engines
    3512017 1970-1971 440 6BBL and '71 440 High Performance
    3577180 1971 383 2 barrel (cast crank)
    3614371 1972-1973 400 Forged Crank
    3614374 1972-1973 400 Cast Crank
    3614371 1972-1973 440 Standard Performance
    3614372 1972-1973 440 High Performance
    3577785 1974 440 Cast Crank
     
  8. Rocky_JS

    Rocky_JS 'cuda

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    E 383 = C-67, D-68, "E-69", F-70

    So from the numbers you gave E 383 is a 1969 model 383, 11 25 2 is the assembly date 11/25/68 and should proceed the engine casting date 11/15/68 which it does. The last "2" is the shift.
     
  9. fratzog lover

    fratzog lover Well-Known Member

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    With Chrysler you really cant be sure of anything. I just got the engine minus cam, and saw the "E" on the dist. pad and hoped it wasnt the code for a cast crank, but rather 1969. Good call Rocky. Much better, thanks all!
     
  10. Rocky_JS

    Rocky_JS 'cuda

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    If an E came after the date then we would be considering something else, but the letter before the 383 is the model year.
     
  11. femtnmax

    femtnmax Well-Known Member

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    My 69 383 2bbl came with a forged crank. Block was cast 5-69, and main/rod bearings stamped mid-69, it had never been apart.
     
  12. fratzog lover

    fratzog lover Well-Known Member

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    Thats what I always remember, no cast cranks till '71.
     
  13. pishta

    pishta I know I'm right....

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    Everything took a dump in 71-72, it was the first year NET HP was quoted, ie. with full dress accessories, exhaust and rear wheel measurement. 71 was also a smog year too

    "..in 1971 Chrysler published both gross and net HP figures for all of their engines across the board. The most common 440 V8 in their full-size cars was rated 335 gross and 220 net. That's pretty extreme, though... usually it's more like 10-20% lower. There's no reliable conversion because of huge variations in gross testing and reporting methods.."
     
  14. ssba

    ssba Well-Known Member

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    If the pan is off you can tell by looking at the shape of the counter weights.
    Squared off corners for cast. More of a rounded shape for forged due to the metal being hammered/ squished between shaping dies.
    Also the parting line will be wider also on a forged cranke due to it went thru a
    stripper die to trim while it was still hot. Cast steel cranks have a narrow
    parting line. You can always tell if you know what to look for.
    Forged will ring like a bell also when tapped.
     
  15. fratzog lover

    fratzog lover Well-Known Member

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    Probably wont have the pan off, or any other disassembly for a couple of weeks. I remember the parting line ID from Don Taylors B/RB rebuilding book.
     
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