Recomended flex plate and torque converter for my 5.9 magnum engine

Discussion in 'Magnum Engine Swaps' started by stingerdart1972, Feb 13, 2018.

  1. stingerdart1972

    stingerdart1972 Well-Known Member

    Messages:
    150
    Likes Received:
    25
    Joined:
    Nov 8, 2015
    Location:
    Area 508
    Local Time:
    4:19 PM
    decided to go automatic trans for my mini magnum stroker engine !

    Need some good combo/matched suggestions...

    2500 stall would be perfect

    And part numbers too would be a great help

    Thank you
     
    Last edited: Feb 13, 2018
  2. stingerdart1972

    stingerdart1972 Well-Known Member

    Messages:
    150
    Likes Received:
    25
    Joined:
    Nov 8, 2015
    Location:
    Area 508
    Local Time:
    4:19 PM
    904 transmission
     
  3. rumblefish360

    rumblefish360 so close yet so far away

    Messages:
    30,779
    Likes Received:
    3352
    Joined:
    Jun 21, 2005
    Location:
    New York, on a Island
    View My Photos
    Local Time:
    5:19 PM
    B&M makes flexplates (sfi approved) that makes the use of a neutral balanced converter OK

    The converter itself is something that needs a ton of information behind it in order to get the correct stall speed for its intended useage.

    All aspects of the car should be know to make a choice.
     
  4. stingerdart1972

    stingerdart1972 Well-Known Member

    Messages:
    150
    Likes Received:
    25
    Joined:
    Nov 8, 2015
    Location:
    Area 508
    Local Time:
    4:19 PM
    What do you need to know
     
  5. Shainesboostin

    Shainesboostin Well-Known Member

    Messages:
    360
    Likes Received:
    35
    Joined:
    Apr 2, 2016
    Location:
    Lincoln
    Local Time:
    4:19 PM
    All the converter companys will have a sspc sheet. Its in depth. Tire size, rear gear, vehicle weight, camshaft, use of vehicle, ect. Or you can buy an off the shelf converter. Which are cheap and generic. Which is tje results youll get. I just got a custom ptc converter. Best thing ive done to the car.
     
  6. rumblefish360

    rumblefish360 so close yet so far away

    Messages:
    30,779
    Likes Received:
    3352
    Joined:
    Jun 21, 2005
    Location:
    New York, on a Island
    View My Photos
    Local Time:
    5:19 PM
    Back in posting hell

    This took almost 40 minutes to post
     
  7. rumblefish360

    rumblefish360 so close yet so far away

    Messages:
    30,779
    Likes Received:
    3352
    Joined:
    Jun 21, 2005
    Location:
    New York, on a Island
    View My Photos
    Local Time:
    5:19 PM
    Sorry if I sound like a dick when I say this... again...

    Everything

    Go to a torque converters website and be shocked at the amount of info they ask to get the best converter for your cars application and what you want out of it.
    IMO, my home town guys rock, click below on Pro Torque;
    ProTorque High Performance Drag Racing Torque Converters
    And Pro Torques converter order form;
    ProTorque | Free Torque Converter Technical Analysis Service
    There is also some very good places below and more not listed;
    Dynamic Converters // Pro-Formance Transmissions
    Torque Converters for Drag Racing - Ultimate Converter Concepts

    Of course you can just go to Summit racing and order a off the shelf 2500 converter.
     
  8. stingerdart1972

    stingerdart1972 Well-Known Member

    Messages:
    150
    Likes Received:
    25
    Joined:
    Nov 8, 2015
    Location:
    Area 508
    Local Time:
    4:19 PM
    The motor is a MRL BUILT : 318 mini stroker 356hp/426tq
    5.9l crate 360 magnum engine ( external balance ) is what he told me is the parts source I needed for my drive train
    I was going to go 4 speed, but decided I'm going automatic transmission.

    No race application just around town fun car so a 2400 stall converter would I'm sure be perfect
    I've got a stock 904 transmission

    Just looking for the right combo and some part numbers to help in ordering

    Somebody got to have something like I have?
     
    Last edited: Feb 13, 2018
  9. replicaracer43

    replicaracer43 Old school member

    Messages:
    3,238
    Likes Received:
    1229
    Joined:
    Oct 10, 2008
    View My Photos
    Local Time:
    4:19 PM
    The FIRST thing I will mention, is you need to know HOW your engine was ballanced, was it internal? Was it external? If external, how much weight is needed on the flex plate. The factory 5.9 magnum and the 360 LA version have DIFFERENT offset weight... 318s, steel crank 340s were internal, aka "neutral" if you don't know how it was ballanced, your making a mistake!
     
  10. RustyRatRod

    RustyRatRod Just another dumbass. FABO Gold Member Technical Editor

    Messages:
    44,975
    Likes Received:
    8713
    Joined:
    Jun 7, 2010
    Location:
    Georgia
    View My Photos
    Local Time:
    5:19 PM
    A stock 340 high stall converter balanced to a 5.9 would be perfect then.
     
  11. stingerdart1972

    stingerdart1972 Well-Known Member

    Messages:
    150
    Likes Received:
    25
    Joined:
    Nov 8, 2015
    Location:
    Area 508
    Local Time:
    4:19 PM
    It's External balanced as all 1993 and later 5.9 360 magnum crate motors are
     
  12. replicaracer43

    replicaracer43 Old school member

    Messages:
    3,238
    Likes Received:
    1229
    Joined:
    Oct 10, 2008
    View My Photos
    Local Time:
    4:19 PM
    So...it's a stroker 318, with with a smaller bore and different weight pistons than a 5.9 magnum, but uses the same external weight as a magnum 5.9?
     
  13. replicaracer43

    replicaracer43 Old school member

    Messages:
    3,238
    Likes Received:
    1229
    Joined:
    Oct 10, 2008
    View My Photos
    Local Time:
    4:19 PM
    Also your thread title says you have a 5.9 magnum, which you don't have....just trying to help ya out here, so you dont make hasty, improper choices....
     
  14. stingerdart1972

    stingerdart1972 Well-Known Member

    Messages:
    150
    Likes Received:
    25
    Joined:
    Nov 8, 2015
    Location:
    Area 508
    Local Time:
    4:19 PM
    Yes same external balance as a 5.9 magnum

    This is the 318 mini stroker motor that FABO member MRL Built
     
  15. rumblefish360

    rumblefish360 so close yet so far away

    Messages:
    30,779
    Likes Received:
    3352
    Joined:
    Jun 21, 2005
    Location:
    New York, on a Island
    View My Photos
    Local Time:
    5:19 PM
    But we do t know how he balanced it.
    Where is that build thread?
     
    • Like Like x 1
    • mullinax95

      mullinax95 Well-Known Member

      Messages:
      12,820
      Likes Received:
      251
      Joined:
      Oct 25, 2006
      Location:
      Anderson, SC
      View My Photos
      Local Time:
      5:19 PM
      You got my hopes up but then let me down Rob!:D

      I need a SFI Flexplate for a 03 Dodge Ram with a 5.9 Magnum

      The engine will be INTERNAL balanced.

      The flexplate must be neutral balanced and work with crank sensor tone ring

      I repeat.. it must be able to work with ECU controlled engine with crank sensor

      I've read that there is no such animal and must be custom made!

      Really.... the flexplate will go on a 408 stroker engine... but just mentioned 5.9 Mag just to keep things simple.:)
       
    • rumblefish360

      rumblefish360 so close yet so far away

      Messages:
      30,779
      Likes Received:
      3352
      Joined:
      Jun 21, 2005
      Location:
      New York, on a Island
      View My Photos
      Local Time:
      5:19 PM
      The crank sensor, can that not be welded on the flexplate somehow?

      How about messing with the OEM part? Rebalancing that?
       
    • stingerdart1972

      stingerdart1972 Well-Known Member

      Messages:
      150
      Likes Received:
      25
      Joined:
      Nov 8, 2015
      Location:
      Area 508
      Local Time:
      4:19 PM
      All I got was a dyno sheet

      Some info off the tread:
      (Mike MRL) "Hello all. I have a 318 Mini stroker we just finished. Its basically a 318 with a 360 crank. Stock Magnum heads, reconditioned with some Minor work done. I used an old school MP flat tappet cam 260/268 duration. Dual plane Air Gap style intake with a Proform 600 mech carb. FBO ignition system. 9 to 1 compression, runs great on 87 fuel."

      "Stock Silvolite 1.741ch. milled the tops down .065(down in hole .008 after deck clean-up) and milled a small 10cc dish. The crown was .325 thick so more than enough for a little removal. Also had to take a bit off the skirt as it interfered with the counterweights, no big deal. Easy Peasy cheap mini stroker and it ran better than expected."

      "The only thing i see that would be an issue is the flywheel. This engine is basically a 360 in a 318 block. It will require a 1993 and later flywheel, external balance as any normal 360 magnum. Other than that everything else will work just fine."

      Rumblefish you have given me lots of help and feed back on this engine when I first purchased it last summer. When I was going to go 4 speed, you seemed to know a lot about this MRL built engine that Mike built.

      Again all I got was a dyno sheet..... when it was sent Mike told me a build sheet would be sent along in the crate with it.
      As most members know this was the last business transaction before Mike closed his shop.

      Thanks for your time and effort much appreciated.
       
    • rumblefish360

      rumblefish360 so close yet so far away

      Messages:
      30,779
      Likes Received:
      3352
      Joined:
      Jun 21, 2005
      Location:
      New York, on a Island
      View My Photos
      Local Time:
      5:19 PM
      Sorry brother, I just don’t remember the particulars of the engine.
       
    • stingerdart1972

      stingerdart1972 Well-Known Member

      Messages:
      150
      Likes Received:
      25
      Joined:
      Nov 8, 2015
      Location:
      Area 508
      Local Time:
      4:19 PM
      That’s all the info I have...
       
    • stingerdart1972

      stingerdart1972 Well-Known Member

      Messages:
      150
      Likes Received:
      25
      Joined:
      Nov 8, 2015
      Location:
      Area 508
      Local Time:
      4:19 PM
      i called Hughes performance
      They will external balance a converter for me and provide the flexplate

      Just need to find out how many spline is on input shaft
       
      Last edited: Feb 14, 2018
    • replicaracer43

      replicaracer43 Old school member

      Messages:
      3,238
      Likes Received:
      1229
      Joined:
      Oct 10, 2008
      View My Photos
      Local Time:
      4:19 PM
      If you just want to bolt it together, you can use a magnum 5.9 flex plate, or go to a aftermarket external ballanced one. The spline count depends on the year of transmission, early 904s had different splines
       
    • replicaracer43

      replicaracer43 Old school member

      Messages:
      3,238
      Likes Received:
      1229
      Joined:
      Oct 10, 2008
      View My Photos
      Local Time:
      4:19 PM
      And I keep mentioning the ballance issue because it sucks to install a engine and have vibration. It's also hard on the bearings. It's my gut feeling "that" engine was a throw together deal to use up left over parts, and a seriously doubt it was even ballanced at all.
       
    • stingerdart1972

      stingerdart1972 Well-Known Member

      Messages:
      150
      Likes Received:
      25
      Joined:
      Nov 8, 2015
      Location:
      Area 508
      Local Time:
      4:19 PM
      That's funny as 8 or 9 members on here said how it was a awesome built engine and Mike was the total bomb and members trusted no one else
       
      • Like Like x 1
      • replicaracer43

        replicaracer43 Old school member

        Messages:
        3,238
        Likes Received:
        1229
        Joined:
        Oct 10, 2008
        View My Photos
        Local Time:
        4:19 PM
        It's just a gut feeling, I'm hoping I'm wrong. Hopefully it is awsome