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  •  » Spring perch mount

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    6/21/2023 2:45 PM  #1

    Nos681
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    From: Atlantic Mine, Michigan
    Registered: 7/14/2016
    Posts: 3,325

    Spring perch mount

    The stock spring perch sits on top of the upper control arm.

    Can the spring perch be mounted to underside  (modifications required of course)?

    Instead of studs, can grade 8 bolts (or higher) or larger diameter bolts?

    I was thinking, this would allow additional shock travel for cars that have been lowered.

     

    6/21/2023 6:17 PM  #2

    TKOPerformance
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    From: Newark, DE
    Registered: 12/15/2014
    Posts: 7,464

    Re: Spring perch mount

    Short answer, no.  The outboard side of the perch is directly above the ball joint.  Simply not enough real estate with the stock configuration. 

     

    6/21/2023 6:44 PM  #3

    rpm
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    From: Bakersfield, Ca
    Registered: 9/17/2013
    Posts: 3,629

    Re: Spring perch mount

    TKOPerformance wrote:

    Short answer, no.  The outboard side of the perch is directly above the ball joint.  Simply not enough real estate with the stock configuration. 

     
    What's the long answer?

    Bob. 69 Mach 1, 393W, SMOD Toploader, Armstrong  steering, factory AC.
     

    6/21/2023 7:02 PM  #4

    MS
    Forum Originator

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    From: Canyon Lake, Texas
    Registered: 1/24/2013
    Posts: 12,219

    Re: Spring perch mount

    Do like some cars and just put the end of the spring hard against the UCA and let the spring flex as the UCA travels. The movement is not that great anyway.

    Money you enjoy wasting is NOT wasted money... unless your wife finds out.
     

    6/21/2023 9:00 PM  #5

    Nos681
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    From: Atlantic Mine, Michigan
    Registered: 7/14/2016
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    Re: Spring perch mount

    Ok….next question..,short stories are good too.

    What about a coil over setup in this configuration?

    Top of spring in factory location AND lower shock mount under the control arm.
    Visual aid attached of current setup for those of ya from the show me state. 😁

       •Thread Starter
     

    6/22/2023 7:02 AM  #6

    TKOPerformance
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    From: Newark, DE
    Registered: 12/15/2014
    Posts: 7,464

    Re: Spring perch mount

    Bearing Bob wrote:

    TKOPerformance wrote:

    Short answer, no.  The outboard side of the perch is directly above the ball joint.  Simply not enough real estate with the stock configuration. 

     
    What's the long answer?

    Probably something involving a lot of engineering, because you could make anything work if you really, REALLY wanted to.

     

    6/22/2023 7:12 AM  #7

    TKOPerformance
    Hyper FYIFORD ADDICT

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    From: Newark, DE
    Registered: 12/15/2014
    Posts: 7,464

    Re: Spring perch mount

    Nos681 wrote:

    Ok….next question..,short stories are good too.

    What about a coil over setup in this configuration?

    Top of spring in factory location AND lower shock mount under the control arm.
    Visual aid attached of current setup for those of ya from the show me state. 😁

    The bottom of the UCA isn't contoured to make that easy.  If you remove material in that well area you would considerably weaken the arm.  I suppose you could use spacers and longer bolts to lower it below the well (assuming a long enough coil over), but the spacers become a lever and may cause the mounting points in the UCA or the bolts to fail.  Alternately you could fabricate some L shaped pieces and weld them to the UCA to avoid the spacers.  That would probably be the safest way to do it,  Just keep in mind that with the factory setup if the spring perch fails, bolts break, etc. the spring is still captured above the UCA.  If the the bolts fail, cross shaft breaks, etc. while its UNDER the UCA the suspension collapses on that side and carnage likely ensues. 

    My thoughts are, if you want to pursue that concept fabricate a UCA from round or square stock so the mounting location is where you want it, AND the arm still has proper strength.  You can also keep the safer captured spring setup the OEM system has by simply lowering the coilover mount relative to the UCA center line. 

     

    6/22/2023 8:03 AM  #8

    rpm
    Senior 24-7 FYI Addict

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    From: Bakersfield, Ca
    Registered: 9/17/2013
    Posts: 3,629

    Re: Spring perch mount

    Install your tube control arms and be done with it.

    Bob. 69 Mach 1, 393W, SMOD Toploader, Armstrong  steering, factory AC.
     

    6/22/2023 8:29 PM  #9

    Nos681
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    From: Atlantic Mine, Michigan
    Registered: 7/14/2016
    Posts: 3,325

    Re: Spring perch mount

    That’s the plan, when I get a break from work…construction season.
    Need to get some measurements before disassembly.

       •Thread Starter
     

     

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