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Fired up my rebuilt flattie.

Discussion in 'The Hokey Ass Message Board' started by bobscogin, Mar 19, 2011.

  1. bobscogin
    Joined: Feb 8, 2007
    Posts: 1,761


    My freshly rebuilt '42 Merc.

    <iframe title="YouTube video player" src="" allowfullscreen="" width="640" frameborder="0" height="390"></iframe>

  2. RAF
    Joined: Sep 13, 2008
    Posts: 432

    from MA.

    Looks and sounds great!!
  3. Sweet, sounds great what cam are you running in it?
  4. Killer! It's weird to see a Rochester on a flatty!

  5. Stukka
    Joined: Feb 13, 2007
    Posts: 64

    from SoCal

    Nice! I wanna put that on my ipod and just listen to it all day.
  6. bobscogin
    Joined: Feb 8, 2007
    Posts: 1,761


    Schneider cam. Here's the details:
    1942 Mercury 239, bored .060" over (249 cu. in.), Stcok 29A heads, Schneider 260º duration / .355" lift cam, Johnson type hollow adjustable lifter, Lincoln Zephyr valve springs, '49-'53 Mercury intake with Rochester 2GC carb, full flow oil filtration modification with spin on filter, and PCV system.
    Last edited: Mar 19, 2011
  7. Great stuff, I dream of the day. How about a break down on the ingredients and such.

    Attached Files:

  8. bobscogin
    Joined: Feb 8, 2007
    Posts: 1,761


    Thanks! Yeah, I feel guilty about the Rochester. They came on small block Chevys, and everybody's got one of those.:D However, the Rochester is a great carb -- traditional, cheap, easy to tune, doesn't leak, and bolts right up to the Merc intake.

  9. bobscogin
    Joined: Feb 8, 2007
    Posts: 1,761


    See post #6. Looks like you got a good start. I've built lots of engines in the past 45 years, but the flathead was a new experience, and none have given me a woodie on start up like this one has.:D It really makes you experience the essence of old time hot rods like nothing else. Good luck on yours --

  10. stude_trucks
    Joined: Sep 13, 2007
    Posts: 4,755


    Very cool. But remember, if your woodie lasts for more than 4 hours, consult your physician.
  11. Rickybop
    Joined: May 23, 2008
    Posts: 7,033

    from Michigan

    Congrats! Looks and sounds good. Hey...rev that sucker up! lol
  12. fab32
    Joined: May 14, 2002
    Posts: 13,985

    Member Emeritus

    Don't feel guilty about the Rochester. Like was stated it's one of the finest simplest, most versatile carbs ever built. They come from the factory (in different cfm ratings) on just about every GM product ever built at one time or another. I've used them on BBC's (in multiple arrangements) Chrysler and Ford engines and VW's. I held the hill climb record for 1200 and 1600 cc Vw's with them adapted to single port VW heads for over 3 years at the Ogema Sport and Trail hill climbs in northern Michigan with 2 different sized Rochesters competing against Webers and fuel injected rail buggies. A small one on a 283 will net you over 20 mpg in a sanely driven A body GM offering.

  13. bobscogin
    Joined: Feb 8, 2007
    Posts: 1,761


    The one on my flattie began it's career on a '66 Buick 340. Small base with the 1 7/16" throttle bores. Bolts right on the late Merc intake.

  14. cruzr
    Joined: Jan 19, 2006
    Posts: 3,125


  15. HambBurglar
    Joined: Feb 22, 2011
    Posts: 35

    from Cincinnati

    Now that's motivational! I hope hear that same beautiful sound later this year. Thanks for posting.
  16. Road Oiler
    Joined: May 31, 2010
    Posts: 146

    Road Oiler

    Very nice. I'd love that sound as a ring tone..
  17. t-rod
    Joined: Feb 7, 2009
    Posts: 423


    It's always great to see and hear vintage lungs breathing again. Thanks for sharing!
  18. capten icon
    Joined: Oct 28, 2010
    Posts: 54

    capten icon
    from Lodi

    love the video. inspires me to find a better job to make the money to rebuild my 21 stud. is that an alternator i see on there? if so, what kind from what motor? also, what fan are you using to cool it? thanks for the info. great motor!
  19. hasty
    Joined: Jul 5, 2009
    Posts: 1,409


  20. Damn that sounds sweet. As has been said, it is music!
  21. ironandsteele
    Joined: Apr 25, 2006
    Posts: 5,334


    awesome! nothing quite like the sound of a flathead v8
  22. bobscogin
    Joined: Feb 8, 2007
    Posts: 1,761


    Yes, it's an alternator. It's one of the small Denso style such as used on Toyota fork lifts. I wanted to use a mechanical fan. Fan height with a central mounted alt/gen can be a problem in an AV8, so I built a combination fan carrier and alternator bracket. That lets me get the fan down much lower than if mounted to the alt/gen. If you look closely, you can see that there's no flange on the fan shaft. I'm not going to cut the shaft to final length and weld the flange on until the engine and radiator are mounted in the chassis.

  23. yblock292
    Joined: Oct 10, 2006
    Posts: 2,937


  24. rustyford40
    Joined: Nov 20, 2007
    Posts: 2,168

    from Mass Bay

    I'm going to record that sound and play it a night to go to sleep by.

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