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Projects Scratch built hot rod frame

Discussion in 'The Hokey Ass Message Board' started by imopie, Jul 15, 2013.

  1. imopie
    Joined: May 31, 2008
    Posts: 16

    imopie
    Member

    I'm looking to build a frame for my 35 Chevy truck. I plan on using 34 ford cross members and 2x3 steel tubing. Any one done anything like this? Any advice?


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  2. Gearhead Graphics
    Joined: Oct 4, 2008
    Posts: 3,890

    Gearhead Graphics
    Member
    from Denver Co

    Lots of clamps and squares. Make sure its straight 8-9 times before welding it. I've built a lot of frames from scratch, we had a jig to clamp them in so every one was exact. Time and patience...
     
  3. Marty Strode
    Joined: Apr 28, 2011
    Posts: 8,911

    Marty Strode
    Member

    I would use 2X4 tube for the main rails, and depending on how the rear kick up is configured, you could probably use 2X3 for the rear section.
     
  4. panhead_pete
    Joined: Feb 22, 2006
    Posts: 3,487

    panhead_pete
    ALLIANCE MEMBER

    100x50x3 mm for main rails. You need to set down and draw this out before cutting. Key considerations include wheel base, ride height, tyre sizes, suspension type and mounting.

    Whats wrong with the original chassis?
     

  5. Hundred by fifty - wanna see him ask for that in a steel supply house in the US :D

    yeah I know, it works out to 2X4
     
  6. imopie
    Joined: May 31, 2008
    Posts: 16

    imopie
    Member

    The original frame is a 1.5 ton and I'm building a rat rod. My concern is getting curves correct: the rear will be wider than the front. Plus I want it low to the ground so a nice kick up front and in back. The body will be channeled, run a straight 8 and a 5 speed. Working on the sheet metal now but getting ready for the frame.


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  7. luckyfasteddie
    Joined: Feb 23, 2006
    Posts: 129

    luckyfasteddie
    Member

    This is not the place to talk about building a rat rod .
    There are sites that deal with rat rod building and you will find the folks there much more receptive than here . PM me and I will tell you about them . LFE
     
  8. Leviman
    Joined: Dec 11, 2012
    Posts: 201

    Leviman
    Member

    Just call it a hot rod and call the surface rust traditional...
     
  9. badshifter
    Joined: Apr 28, 2006
    Posts: 3,538

    badshifter
    Member


    A member since 2008?
    And now this?
     
  10. imopie
    Joined: May 31, 2008
    Posts: 16

    imopie
    Member

    My bad. Not really a rat rod. Closer to a traditional hot rod. I've been so busy with school and work that I didn't have enough time to follow along with the appropriate vernacular. I'm going for a build similar in style to jimmy shines 34.


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  11. 1971BB427
    Joined: Mar 6, 2010
    Posts: 8,765

    1971BB427
    Member
    from Oregon

    Nice save! ;)
     



  12. Yes, SEARCH.
    :rolleyes:


    Not like you are the first guy to build a frame.
     
  13. imopie
    Joined: May 31, 2008
    Posts: 16

    imopie
    Member

    That's why I'm picking the brains of the hamb


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  14. I used the 1-1/2 ton frame for mine...some of it anyway.
     
  15. 85-percent
    Joined: Apr 5, 2005
    Posts: 328

    85-percent
    Member

    I think its a worthwhile subject. One question I've had forever is the calculation for compression on the suspension and tires fully loaded, as the chassis is usually built on a jig off the ground.

    for example, you have a 25" dia tyre that's 12-1/2" from spindle centerline to the ground. when that wheel is supporting perhaps 750 to 1000 pounds how much smaller does that 12-1/2" radius get?

    100 x 50 x 3 is very close to 4" x 2" x .120" wall. quick - name one other country on the planet beside the usa that still uses the inch system.

    -jim
     
  16. tinmann
    Joined: Nov 11, 2005
    Posts: 1,588

    tinmann
    Member

    2' x 3'? Too bendy/flexy. Go 2' x4" at least. The Jimmy Shine thing WAS cool there for a bit, wasn't it?
     
  17. Jkustom
    Joined: Oct 8, 2002
    Posts: 1,686

    Jkustom
    ALLIANCE MEMBER

    That was quick! :)
     
  18. Andy
    Joined: Nov 17, 2002
    Posts: 5,121

    Andy
    Member

    I would go ot 2x6 or 4x4 because I see a long wheelbase with the straight 8.
     
  19. imopie
    Joined: May 31, 2008
    Posts: 16

    imopie
    Member

    I appreciate all the advice. Thinking of using the stock rails under the cab then 2x4 .120" for and aft thanks to all the replies. Any advice on mapping out the contours in front of the cab? Plus, how do I go about planning the proper amount of kick for and aft?


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  20. Since this is back up I will say that it is going to be quite a task to get the proportions right if you use a straight 8.
     
  21. pitman
    Joined: May 14, 2006
    Posts: 5,148

    pitman

    Your kick or Z drop measures will come when you prop up suspension pieces in their tire height, spring-perch positions and the body floor height get tweeked into something workable. Read up on 'scrub-lines' if you are planning to go low.
    And stay high enough to always steer out of trouble.
     
  22. imopie
    Joined: May 31, 2008
    Posts: 16

    imopie
    Member

    Like from speed bumps? :)


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  23. imopie
    Joined: May 31, 2008
    Posts: 16

    imopie
    Member

    Thanks so much! I know the 8 will make things difficult but the look will be worth it.


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  24. scott 351 wins
    Joined: Dec 22, 2009
    Posts: 434

    scott 351 wins
    Member

    build a mock up frame out of good ole 2x4's from any lumber yard.
     
  25. pitman
    Joined: May 14, 2006
    Posts: 5,148

    pitman

    Sure bumps, or flat tires, broken main leaf etc.
    Practice making Zee joints w/3" sheetrock screws, in the studs ^^^
    _____
    ____/\____
    .......\/____
     

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