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About how much lower dose frame go one motor installed

Discussion in 'The Hokey Ass Message Board' started by 1929sedanrod, Dec 23, 2014.

  1. 1929sedanrod
    Joined: Nov 6, 2014
    Posts: 58

    1929sedanrod

    How much lower is my 29 ford gunna sit once I get my bbc in it I'm all tacked up at 5 inch ground clearence was thinking once bbc is in will sag a inch ????


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  2. Clevername
    Joined: Feb 18, 2011
    Posts: 318

    Clevername
    Member

    Hookes' Law: F=kx.

    k: spring constant (usually in.-lbs)
    F: Force (bbc weight)
    x: displacement (in.)

    Kelvin
     
  3. timwhit
    Joined: Jan 30, 2012
    Posts: 5,185

    timwhit
    Member

    I think your going down more than one inch. Along with ride height your going to have to look at the clearence between the spring and frame/axle.
     
  4. Should be between 1" and 9" give or take 6"
     
  5. squirrel
    Joined: Sep 23, 2004
    Posts: 59,925

    squirrel
    Member

    yeah, it's anybody's guess, especially since we dont know what kind of spring you have, etc.
     
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  6. Slopok
    Joined: Jan 30, 2012
    Posts: 2,987

    Slopok
    Member

    Dose means two doesn't it?o_O
     
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  7. 1929sedanrod
    Joined: Nov 6, 2014
    Posts: 58

    1929sedanrod

    Have a speedway drop axle speedway wish bones with rev eye spring spring behind axle set up frame is notched for spring it's set at 5 inch ground clearence afraid once motor goes in will be to low I could still lower crossmember (32fordstyle) to gain 1.5 inch or clearence not sure if will need it like to be about 4 inch give or take a little


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  8. squirrel
    Joined: Sep 23, 2004
    Posts: 59,925

    squirrel
    Member

    Then after you get the motor in, you need to get the rest of the parts on the car, and drive it around a little so it settles, THEN you can try to get the ride height like you want it. Before then, you're wasting your time.
     
  9. 1929sedanrod
    Joined: Nov 6, 2014
    Posts: 58

    1929sedanrod

    Yes but once the crossmember is welded in that's kind of it so would like to get close I'm hopeing so one can say I had 8 inch or clearence put body and motor then had 6


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  10. On a regular spring over axle.
    Figure it will settle with 2-1/2" between the axle and spring at the center.

    It's always easier to go up on ride height a little bit that it is to come down.
     
  11. big duece
    Joined: Jul 28, 2008
    Posts: 7,044

    big duece
    Member
    from kansas

    If its too much, they do make all alum. bbc's:D
     
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  12. 1929sedanrod
    Joined: Nov 6, 2014
    Posts: 58

    1929sedanrod

    Lol alum bbc dreams


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  13. Runnin shine
    Joined: Apr 12, 2013
    Posts: 3,383

    Runnin shine
    Member

    I will also add that if I drop my aluminum BBC heads on my foot it will break and bleed alot. If I drop some cast iron heads on my feet I will die! How do you think a spring feels about this?


    "I need my mirror boy"
     
  14. Kerrynzl
    Joined: Jun 20, 2010
    Posts: 3,598

    Kerrynzl
    Member

    You want approx. 4 -5" of travel from full droop [wheels hanging] to ride height for a comfortable ride.
    If it only loads down 1" the spring is too stiff [ like a tuning fork ]
     

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