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Can you ID this cam with double lobes?

Discussion in 'The Hokey Ass Message Board' started by outagas, Aug 30, 2010.

  1. outagas
    Joined: Sep 28, 2008
    Posts: 19

    outagas
    Member

    Saw this cam at the Peterson musuem in L.A. Was in a scene from the past of an old Hot Rod Garage of the 40"s and 50's. Look at the lobes on the cam...there are double lobes and it would appear this would open the valves twice as often as a std 4 cycle cam. The cam appears to be a small block chevy, but I'm not positive. Any body out there ever seen a cam with a grind like this??:confused:
     

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    Last edited: Aug 30, 2010
  2. yea the drove the cam at half speed. It was supposed to make them work better less valve deflection or something like that.
     
  3. DD COOPMAN
    Joined: Jul 25, 2009
    Posts: 1,121

    DD COOPMAN
    Member

    Shaller Quarter-Speed cam. DD
     
  4. Phil1934
    Joined: Jun 24, 2001
    Posts: 2,717

    Phil1934
    Member


  5. That actually sounds right. I knew they slowed it down but I couldn't remember how much. But 4 strokes would actually be 1/4 speed to work.
     
  6. Tman
    Joined: Mar 2, 2001
    Posts: 34,945

    Tman
    ALLIANCE MEMBER

    Schaller

    One of the first 3 Hot ROd annuals has a good story on them.
     
  7. batt69nova
    Joined: Nov 4, 2009
    Posts: 225

    batt69nova
    Member
    from OR

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

    bobscogin
    Member

    I remember those well, but never gave any thought to the following: How did they actually drive it? It would take half as many teeth on the crank, or twice as many teeth on the cam. On a SBC, for instance, what did the timing gears look like? Also, the oil pump and distributor would be turning at half the original speeds. What did they do about that?

    Bob
     
  9. I think you replaced the distributer gear with one that meshed with whatever gear they had on the cam to drive the dizzy. Timing gears would be the same thing you probably bought everything from the cam manufacturer.
     
  10. Tman
    Joined: Mar 2, 2001
    Posts: 34,945

    Tman
    ALLIANCE MEMBER

    Yes, it came with timing gears etc. I will try and scan the info I have tomorrow and post it.
     
  11. Ratty55
    Joined: Nov 13, 2007
    Posts: 396

    Ratty55
    Member
    from Frohna,MO

    The cam was gear driven. The gear on the cam was very big and drove straight off the crank with no idler like a normal gear drive setup so they also rotated in reverse and had special reverse rotation distributors to go with the kit.
     

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