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Technical Are 30/31 Model A open cowls a different length to the closed cowls ?

Discussion in 'Traditional Hot Rods' started by chev34ute, Dec 10, 2018.

  1. chev34ute
    Joined: Nov 13, 2011
    Posts: 1,240

    chev34ute
    Member

    Hey Guys.
    I need to know if the roadster cowls are different dimensions along the beltline. If so, what the dimension is ? I am looking to get some 30 Roadster doors shortly and I want to make sure I can adapt the cowl to suit the doors. Any help is greatly appreciated !
     
  2. Elrod
    Joined: Aug 7, 2002
    Posts: 3,566

    Elrod
    Member

    Different body line. Roadster has one bump on the door lines.

    [​IMG]

    Coupe has two bumps on the body line

    [​IMG]
     
    dan31 likes this.
  3. sloppy jalopies
    Joined: Jun 29, 2015
    Posts: 5,256

    sloppy jalopies
    Member

    yup... roadsters are about an inch longer. roadster doors are a bunch shorter...
    I will go out and measure them for you when the sun comes up...
     
    chev34ute likes this.
  4. chev34ute
    Joined: Nov 13, 2011
    Posts: 1,240

    chev34ute
    Member

    That’s much appreciated !
     

  5. sloppy jalopies
    Joined: Jun 29, 2015
    Posts: 5,256

    sloppy jalopies
    Member

    Here comes the sun...
    Last built a roadster in '83, so I was a bit off with my estimates...
    .
    Open car cowl sides are 16 1/16" front to back at the lower edge of the upper hinge to the forward edge.
    Closed car cowls are 15 7/8"...
    .
    Open car cowls are 20" tall from the bottom of the lower bead up to the bottom of the upper hinge.
    Closed car cowls are 20 5/8"...
    .
    Didn't measure the distance between the hinges but I can if it helps...
    .
    The single roadster beltlines are 2.??" tall...
    Closed cars have about the same size upper bead plus about a 5/8" tall bead adjacent to, [under] it...
    ….. HIH.
     
    chev34ute likes this.
  6. continentaljohn
    Joined: Jul 24, 2002
    Posts: 5,536

    continentaljohn
    Member

    Roadster doors are 24 inches and coupe doors 26 3/4 or so . The cowl surprised me because the gas tanks are the same but after looking at both you can see the difference
     
    chev34ute likes this.
  7. sloppy jalopies
    Joined: Jun 29, 2015
    Posts: 5,256

    sloppy jalopies
    Member

    Memory says a '28-'29 roadster door is 24" and change... the '30-'31 doors are 25" and change...
    .
    The closed car doors taper from the top to narrower at the bottom...
    .
    Outside skin at the beltline of the '30-'31 truck, and tudor doors and the '28-'29 coupe and tudor doors are 29.25" long...
    '30-'31 coupe, sport coupe and some fordors are 27.5" long...
    Grab your tape measures boys...
     
    Last edited: Dec 11, 2018
    chev34ute likes this.
  8. continentaljohn
    Joined: Jul 24, 2002
    Posts: 5,536

    continentaljohn
    Member

    I am lucky enough to own all of them roadsters and my 28 29 doors are 22.5 inches and 30-31 are 24 inches . The coupe doors on the 30-31 are 27.5 not the 26.750 thanks for the correction sloppy not enough coffee this morning but not sure on the Mordors and don’t have any of them:D
     
    Never2low and chev34ute like this.
  9. Smokin Joe
    Joined: Mar 19, 2002
    Posts: 3,770

    Smokin Joe
    Member

    If you are wondering if it's a 31 or 30, Sometime early in 31 Ford went to a caved in area in the firewall where the fuel line runs from the gas tank thru firewall to the glass gas filter. If it has that cove, it's deffinitly a 31. Doesn't answer your question, but others already answered that.
     
  10. chev34ute
    Joined: Nov 13, 2011
    Posts: 1,240

    chev34ute
    Member

    Thanks for all the info.
     
  11. Elrod
    Joined: Aug 7, 2002
    Posts: 3,566

    Elrod
    Member

    The fuel tank shut off valve was inside the car and the dripped gas making the car smell inside. Also in 1930, everyone and their cat smoked. Gas was dripping on people's feet and catching them on fire with cigarette ash. In June or July of 1931, the state of New York required Ford to move the fuel shut off valve outside the vehicle, so they made the intention in the firewall and moved the valve outside the passenger compartment for safety.
    1932 they moved the gas tank out of people's laps and to the rear of the car.
     
    continentaljohn likes this.

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