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Technical Blown flathead - streetable?

Discussion in 'Traditional Hot Rods' started by bhemi, Nov 16, 2018.

  1. Yes! One time I lost the spline on the gear drive in the front blower case and the rotors spun with vacuum, but it was a DOG! I just took the belt off and finished the trip of about 1000 miles home. :eek:
     
    Last edited: Nov 17, 2018
    blowby and mad mikey like this.
  2. 37_Ford
    Joined: Mar 9, 2011
    Posts: 45

    37_Ford
    Member
    from Illinois

    IMG_0022.jpg
    29 roadster on 32 frame with a 286 (8.5 compression), modified 371 blower (5-6 lbs of boost), Harman & Collins dual coil, Stromberg 48’s, 5 speed trans (2.95 fist gear with .73 overdrive), Ford 8 inch rear (4.11 track lock). Over 20,000 care free miles with multiple 300 mile trips (10-12 mpg). Lots of fun.
     
  3. oldsman41
    Joined: Jun 25, 2010
    Posts: 1,556

    oldsman41
    Member

    Don’t take this the wrong way i love mercy and i own a flatty 51 merc but dollar for dollar you can get a lot more horsepower from just about anything else. Olds Buick Ford anything overhead valve. If my flatty ever gives out in my merc i will probably go ford motor.
     
  4. Good point. It will get you home , but thats it.
     
    Montana1 likes this.
  5. olscrounger
    Joined: Feb 23, 2008
    Posts: 4,774

    olscrounger
    ALLIANCE MEMBER

    I have always wanted to put a blown flathead in a 40 coupe but a little out of my area of expertise. We were in Hawaii for Cruise paradise in 03 and there was a local there with a 40 that had a blown flathead-he said it was very reliable and had driven it many miles-he led us on tours all over the island and it moved right along-I was impressed!
     
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  6. Rusty O'Toole
    Joined: Sep 17, 2006
    Posts: 9,660

    Rusty O'Toole
    Member

    Stock engine is 255 cu in and 110HP. That is enough to keep up with modern traffic and take you anyplace you want to go.

    IF the engine is in good shape recently rebuilt you can dress it up with high compression heads, dual exhaust, two carburetors, possibly a cam and lightened flywheel and get it up to 150HP or so.

    If you want more performance than that, best thing to do is replace the engine with a modern OHV V8 trans and rear axle.Think about disc brakes and suspension improvements if you want to use that HP.

    If it was mine I would leave it alone or if it is due for a rebuild consider a mild hop up but to each his own.
     
    Texas Webb likes this.
  7. Ralph Moore
    Joined: May 1, 2007
    Posts: 655

    Ralph Moore
    Member

    My friends flathead with recent blower addition. Very steetable.
    Runs like a bat outta hell![​IMG]


    Sent from my iPhone using The H.A.M.B. mobile app
     
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  8. 19Fordy
    Joined: May 17, 2003
    Posts: 8,056

    19Fordy
    Member

    Answer is................. very driveable.
    DSC06313 (Small).JPG
     
  9. 51 mercules
    Joined: Nov 29, 2008
    Posts: 3,871

    51 mercules
    Member

    My friend has a blown flathead in his 29 roadster and it's streetable.
     

    Attached Files:

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  10. squirrel
    Joined: Sep 23, 2004
    Posts: 56,088

    squirrel
    Member

    Steve put a lot of miles on this car....

    IMG_2218.JPG
     
  11. justabeater37
    Joined: Jan 1, 2009
    Posts: 1,702

    justabeater37
    ALLIANCE MEMBER

    Need more pictures of this please.
     
  12. 37_Ford
    Joined: Mar 9, 2011
    Posts: 45

    37_Ford
    Member
    from Illinois

    8CA91928-B1BC-4B07-8070-4950F471A5A1.jpeg
     
  13. classiccarjack
    Joined: Jun 30, 2009
    Posts: 1,465

    classiccarjack
    Member

    Hmmmm....

    Sent from my Moto Z (2) using The H.A.M.B. mobile app
     
  14. classiccarjack
    Joined: Jun 30, 2009
    Posts: 1,465

    classiccarjack
    Member

  15. classiccarjack
    Joined: Jun 30, 2009
    Posts: 1,465

    classiccarjack
    Member

    X2!!!

    Sent from my Moto Z (2) using The H.A.M.B. mobile app
     
  16. Bandit Billy
    Joined: Sep 16, 2014
    Posts: 12,381

    Bandit Billy
    ALLIANCE MEMBER

    Mine, built by the book. To be honest, I have never driven a flathead without a blower so I have no base line. But I have driven hundreds of V8 OHV cars and this thing kicks ass when all the carbs are squirting.
    upload_2018-11-27_9-56-21.png
    One of you said earlier on this thread something to the extent that there are cheaper ways to make horsepower than building a blown flathead. That is true. BUT that same line of thinking taken to the extreme would have us all driving Subaru WRX's. Now if I was building on a budget...that is another matter entirely. For the cost of this motor I could have paid for my interior, tires, wheels, and quite a bit of the paint job.
     
    Jet96 likes this.
  17. Binger
    Joined: Apr 28, 2008
    Posts: 1,734

    Binger
    Member
    from wyoming

    [​IMG]

    This car was driven from Omaha to the Hot Rod Hill Climb. Super cool car with many one off built parts.


    Sent from my iPhone using H.A.M.B.
     
    Texas Webb and Jet96 like this.

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