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  1. #1
    Join Date
    Feb 2006
    Location
    Somerset
    Posts
    1,086

    Front Spring Change

    Hi

    Its been a while since I built the Cobra (a long while!) and apart from general maintenance I haven't done much spanner work, so please bare with me!! Since replacing my RV8 with a 350 Ford Stroker and Tremec gearbox, the car has been a bit heavy on the front as you can imagine. The ride height is to low as the springs aren't rated high enough. I have been in touch with Andy Burrows and he is sending me some up-rated springs to fit as a replacement.

    My questions are as follow:-

    Will it be possible to change the springs without taking the shocks completely off the car (undo at the top maybe but leave the bottom attached?) I have limited space since moving house so the easier it is for me the better!!
    Will the spring need compressing or do I just wind the support plate right down to the bottom before I take them off?
    Lastly, the Pro Tech shocks have a knurled knob for damper adjustment. How do I know what the setting should be once the new springs are on?

    Many thanks

    Martin

    GD427 Mk4. Chassis No J0258

    Ford 347ci Stroker - AFR 185 heads - Holley 670 - KB Pistons - Lunati "Voodoo" 272/280 Cam - 451 bhp/441 lbft.

  2. #2
    Join Date
    May 2004
    Location
    Finchampstead, Berkshire, UK.
    Age
    55
    Posts
    3,800
    Yep, that will work.

    Jack car up
    Remove wheel
    Wind spring base all the way down
    undo top shock mount
    Swing shock out
    Prise out top collar and lift spring off.

    As for the dampers, I start at the softest and work my way up until it’s too hard....then back off 3 clicks (highly scientific!)

    Rgds
    Jim
    GD Mk3 Jag based
    Supercharged LS1
    GD J1M

  3. #3
    Join Date
    Feb 2006
    Location
    Somerset
    Posts
    1,086
    Perfect!!

    Thanks Jim

    GD427 Mk4. Chassis No J0258

    Ford 347ci Stroker - AFR 185 heads - Holley 670 - KB Pistons - Lunati "Voodoo" 272/280 Cam - 451 bhp/441 lbft.

  4. #4
    Join Date
    May 2004
    Location
    Finchampstead, Berkshire, UK.
    Age
    55
    Posts
    3,800
    2nd thoughts, no it won’t

    Just nipped out to the garage and checked....no chance, top arms won’t allow enough movement

    Soz

    Jim
    GD Mk3 Jag based
    Supercharged LS1
    GD J1M

  5. #5
    Join Date
    Feb 2006
    Location
    Somerset
    Posts
    1,086
    Must admit I looked at mine and did wonder. Ok they'll have to come off then. Hopefully shouldn't be to difficult!
    Thanks Jim

  6. #6
    Join Date
    May 2008
    Location
    Cambridge
    Posts
    143
    I replaced my front shocks not that long ago. As I recall, I did "need" spring compressors, as the spring was still under a bit of compression even with the base wound all the way down. I figured it was safer, but there was not much compresssion left, maybe about 1cm...
    --
    Richard
    GD Mk3 LS6

  7. #7
    Join Date
    Feb 2011
    Location
    Northampton
    Age
    42
    Posts
    4,621
    I meant to say something like that - it highly depends on the 'free length' of your spring vs shocks.. on the GAZ shocks Dax supplied for my DeDion the fronts needed no compressors to assemble (just unwind the lower collar, remove the top collars and the spring slides off/on) but the rear needed compressors - or in my case, due to the small diameter of the spring, ratchet straps*, to compress the spring enough to get the top collars on.

    *Not recommended, do at your own risk etc, there is a lot of stored energy in a suspension spring!
    My DeDion build diary..
    Hon Sec of the Digidash branch of the Unpopular Kit Car Design club

  8. #8
    Join Date
    Feb 2006
    Location
    Somerset
    Posts
    1,086
    Just to round the thread up, I changed the springs today without to much drama. I had to remove the shocks to change the springs and the only 'fiddly' bit was taking the top collar off to remove the springs and then putting it back once the new springs were fitted.
    Thanks for all responses

    Martin

  9. #9
    Join Date
    Apr 2004
    Location
    East Leake, Nottinghamshire, England.
    Age
    56
    Posts
    9,605
    Glad to hear you got it all sorted, let us know what you fitted and how it is once you’ve had a chance to go out and drive it a bit.
    Martin

    351W 416.7 HP and 466.8 ft-lbs

    Running Mega Squirt and Edis 8


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