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History Valve in head conversions for Flathead V8

Discussion in 'The Hokey Ass Message Board' started by porknbeaner, Jan 25, 2016.

  1. Hnstray
    Joined: Aug 23, 2009
    Posts: 10,584

    Hnstray
    ALLIANCE MEMBER
    from Quincy, IL

    Seb,
    If you count the rockers on the upper shaft, there are eight......only four on the lower. Half of the upper rockers are 'relay' rockers, transferring action across the top of the head, via a pushrod, into an arm on the lower rocker that then operates the valve.

    Ray
     
  2. moefuzz
    Joined: Jul 16, 2005
    Posts: 4,951

    moefuzz
    Member

    .



    ..I found this pic years ago on a cutaway art forum and it was listed as "an overhead valve"
    (on a Mercury Flathead block)

    ...It was in fact a very nice cutaway diagram of the Adams-Moeller rocker-arm heads
    Which were a marvel of early technology..
    .."inclined valves, doomed pistons, transverse pushrods on the exhaust side"
    and even a Quadletteral capti-nomplate to boot!

    OHV%20Merc.JPG



    Adams-Moeller rocker-arm heads as per the above cutaway.



    Adams-Moeller rocker-arm heads.jpg





    .
     
    Texas Webb and rmcroadster like this.
  3. falcongeorge
    Joined: Aug 26, 2010
    Posts: 18,341

    falcongeorge
    Member
    from BC

    This kinda looks like a 351 Cleveland!:D Beautiful car by the looks of it too.[​IMG]
     
    Last edited: Jan 25, 2016
    Texas Webb likes this.
  4. moefuzz
    Joined: Jul 16, 2005
    Posts: 4,951

    moefuzz
    Member

    .



    I had to dig but I found an article regarding C-T Engineering
    and their modified Ardun Heads.
    (Which would go on win the CRA Sprintcar Championship in 1957)


    ardunstry1.jpg



    ardunstry2.jpg



    ardunstry3.jpg




    .
     
    Last edited: Feb 1, 2016
  5. moefuzz
    Joined: Jul 16, 2005
    Posts: 4,951

    moefuzz
    Member

    .


    Surprise! SOHC mounted in the boot.


    FLATHEAD SOHC.jpg
     
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  6. rusty rocket
    Joined: Oct 30, 2011
    Posts: 3,415

    rusty rocket
    Member

    This was at Goodguys Colorado this year, Sounds like it was one of three made IMG_0013.JPG
     
  7. moefuzz
    Joined: Jul 16, 2005
    Posts: 4,951

    moefuzz
    Member

    .


    The famous Jiggler..
    (Ford V8-60)

    Cover-492x742.jpg


    Page13-493x753.jpg


    Page23-495x767.jpg



    Page33-499x765.jpg



    Page43-494x759.jpg


    Page52-493x760.jpg




    Page7-492x745.jpg



    Page8-491x736.jpg



    .
     
    Ned Ludd, AmishMike and hipster like this.
  8. Bruce Lancaster
    Joined: Oct 9, 2001
    Posts: 21,681

    Bruce Lancaster
    ALLIANCE MEMBER

    Pretty sure there was a one-off dual overhead cam conversion shown in one of the early books (Huntington or Fisher, most likely). I think there was one grainy pic showing V shafts coming up from former distributor location to gear drives upstairs for all the cams. I'm not able to lookitup right now, but I think it was a book as noted that half the HAMB would own. I believe it was an abortive Indy project.
    The flathead and its conversions had one hopeless disadvantage in the ealry OHV days, no matter what went upstairs:
    The flathead started life as a liter or more smaller than any of the early OHV's that had serious competition applications...and the main ones, Olds and Chrysler, had just as much room for extra bore and stroke as the flathead did, so catching up wasn't possible. A maxed-out flathead just reached the starting point for the big engines.
    The last year a flathead took top eliminator at the national drags was '55 (or 6?? Need to go lookitup.), and it barely smoked a hemi to do the job.
    The Chevy was at a different level, roughly flatheadable size, but it was immediately breaking new ground in the power per inch department as a second-generation development of the American OHV.
     
    hipster likes this.
  9. moefuzz
    Joined: Jul 16, 2005
    Posts: 4,951

    moefuzz
    Member

    .


    Smith Jitterbug


    IMG_0205_zps773ea6aa.jpg



    Smith2Smith Jitterbug.jpg


    Smith3Smith Jitterbug.jpg


    Smith1Smith Jitterbug.jpg


    Smith4Smith Jitterbug.jpg




    .
     
    kadillackid likes this.
  10. Cool - Tatra aircooled V8, a really interesting powerplant.

    Steve
     
    moefuzz likes this.
  11. moefuzz
    Joined: Jul 16, 2005
    Posts: 4,951

    moefuzz
    Member

    .



    This one blows me away,
    Not sure what to think..
    Motorcycle cylinders mounted up onto a Flathead?
    (there was no description when the original poster up'td the pic)


    ?


    TrumpedFlat.jpg






    .
     
  12. moefuzz
    Joined: Jul 16, 2005
    Posts: 4,951

    moefuzz
    Member

    .

    The underside of a Dixon head.


    FLATHEAD SPEED COLLECTION 055.jpg







    And Under the cover...

    untitled31.jpg



    untitled30.jpg



    .
     
    kadillackid likes this.
  13. moefuzz
    Joined: Jul 16, 2005
    Posts: 4,951

    moefuzz
    Member

    .



    Europeans will more easily recognize these V8-60 Factory offerings..

    EmiSul V8-60.jpg



    DOTSBE-SimcaEsplanada-5.jpg


    DOTSBE-SimcaEsplanada-2 redux 900.jpg

    .
     
    Last edited: Jan 25, 2016
  14. moefuzz
    Joined: Jul 16, 2005
    Posts: 4,951

    moefuzz
    Member

    .



    Arnold Birner..

    birner1.jpg



    Birner birner2.jpg


    asdf017.jpg



    asdf019.jpg


    AJ Bruner OHV heads.JPG



    .
     
    Last edited: Jan 25, 2016
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  15. moefuzz
    Joined: Jul 16, 2005
    Posts: 4,951

    moefuzz
    Member

  16. moefuzz
    Joined: Jul 16, 2005
    Posts: 4,951

    moefuzz
    Member

    .



    IskyMaxi.jpg

    .
     
    Last edited: Jan 26, 2016
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  17. moefuzz
    Joined: Jul 16, 2005
    Posts: 4,951

    moefuzz
    Member

    ..

    I wish

    LINCOLN V12 ARDUN.jpg

    Shhhh!
    .
     
  18. moefuzz
    Joined: Jul 16, 2005
    Posts: 4,951

    moefuzz
    Member

    .

    Stephens

    Stephens Ford.jpg



    Stephens Ford  IMG8158.jpg



    Stephens Ford  IMG8155.jpg





    .
     
    Last edited: Jan 25, 2016
    kadillackid likes this.
  19. moefuzz
    Joined: Jul 16, 2005
    Posts: 4,951

    moefuzz
    Member

    .

    The real deal, Davis Conversion hiding somewhere in western Europe;)


    DAVIS.JPG

    .
     
  20. belair
    Joined: Jul 10, 2006
    Posts: 8,039

    belair
    Member

    Unbelievable.
     
  21. moefuzz
    Joined: Jul 16, 2005
    Posts: 4,951

    moefuzz
    Member

    .

    Cummings Flathead overhead valve conversion


    cummings1.jpg



    cummings20motor.jpg




    Cummings22.jpg


    .
     
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  22. moefuzz
    Joined: Jul 16, 2005
    Posts: 4,951

    moefuzz
    Member

    .

    I wish we still had automotive journalist like Tom McCahill.
    (And magazines like Mechanix Illustrated)

    scan_481 redux1000.jpg



    scan_482 redux 1000.jpg


    scan_485.jpg




    scan_483.jpg






    scan_486.jpg




    Zora

    Zora-Arkus-Duntov.jpg




    .
     
  23. moefuzz
    Joined: Jul 16, 2005
    Posts: 4,951

    moefuzz
    Member

    .



    Blown (McCulloch) Alexander must have really hauled ass even with only 2
    exhaust ports per side.


    AlexanderMcCulloch.jpg



    .
     
  24. fatkoop
    Joined: Nov 17, 2009
    Posts: 711

    fatkoop
    Member

    There was an older gentleman here in Denver that was putting together a flathead with Cadillac Northstar heads on it. Looked like it would be very possible. I saw it in his shop a few years ago. Unfortunately he has passed away and I never got to see if he finished it.
     
  25. quickchangeV8
    Joined: Dec 7, 2010
    Posts: 325

    quickchangeV8
    Member

    This is brand new but it still fits the parameter of this thread. Mike Davidson of Flatattack fame has just completed a SOHC (Hemi) conversion (Nov/Dec 2015) and is selling kits for those so inclined, to add horsepower to their flathead. From what I understand there are a few options available including a Bosch type fuel injection that can be added on an unmachined portion of the head. I got this information when I was looking through the posts on The Flat Spot on Facebook. You will have to scroll down a bit but there are pictures and a lot of information on Mike Davidson's new conversion on this Facebook site. Maybe someone with more computer savvy than what I possess could post a picture on here from this site. Porknbeaner, this was an excellent idea for a thread,(you have made winter just that much shorter for me) and I have really enjoyed reading all the posts that everyone has posted here. I have always been of the opinion that a flathead is still a flathead even though it has been fitted with an overhead valve or similar conversion. Yes I know technically the basic flathead configuration no longer applies but the block is still a flathead and all of the other engine components are still flathead, so what else could it possibly be called.
     
  26. Dave Downs
    Joined: Oct 25, 2005
    Posts: 845

    Dave Downs
    Member
    from S.E. Penna

    All of these engines are fascinating but I can't figure this one out. Where is the intake/induction manifold? It looks like there is some sort of manifold made out of a rectangular billet but the 3-ported tubes on top look more like water passages. And is that a mechanical direct-port fuel injection pump mounted top dead center? And I love the 'zerk' grease fittings on it.
     
  27. seb fontana
    Joined: Sep 1, 2005
    Posts: 5,852

    seb fontana
    Member
    from ct

    You are closer than you think...The blocks that the water tubes are attached to are actually the fuel injection body so there is no "manifold"..Enlarge View attachment 3117234
     
  28. porknbeaner
    Joined: Sep 12, 2003
    Posts: 40,994

    porknbeaner
    Member

    I believe this to be correct, the water exist back to the radiator from the head unless I am mistaken and the tubes conning out of the air box are for air inlet.

    There was an interesting pic earlier that had mechanical injection and drew the air from the cowl area, I'll see if I can find it. I liked the setup really clean not busy like some carbureted motors.

    Here seb this will help a bit so you don't have to look for the attachment. ;)

    [​IMG]

    Nope I was mistaken that is water, they are using the cowl tank for cooling fluid. Sorry

    [​IMG]
     
  29. porknbeaner
    Joined: Sep 12, 2003
    Posts: 40,994

    porknbeaner
    Member

    Here is a question I have had for a while. The last person I could have asked passed in '03 so now I am depending on you guys for an answer. LOL

    I wonder if there was an advantage to an f head configuration over the exhaust located in the head like a more modern valve in head motor. Is it a cost or design simplicity advantage or?
     
  30. RichFox
    Joined: Dec 3, 2006
    Posts: 9,718

    RichFox
    ALLIANCE MEMBER

    If you went to Overhead intake valve, it allowed you to use a much larger valve than you could if you were to put two valves in the chamber. If you went to overhead exhaust valve, you got the exhaust tract out of the block and lowered engine temp. And again you could use larger valves to feed a long stroke small bore engine.
     

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