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  1. #1
    Join Date
    Aug 2004
    Location
    West Somerset
    Posts
    1,214

    Suspension Suspense...

    Finally ready to admit to it......

    Well if you can remember back way along time.....
    I eluded to modifying my suspension slightly...

    Well after approx 7 years since starting the mod.. I have finally got it sorted...
    I set myself the initial challenge that I would like to eventually drive the thing to work one day (but at this rate I will be retired before I finish!!)
    the problem being the sleeping policemen in the car park...

    Now my solution is not going to please the purist, but then Vipers rarely do anyway.....especially this one......

    So after the initial thoughts and tinkering I now have fully functioning Air Suspension..
    The Journey began with obviously removing the springs and fitting bellows in place of them.
    Rears were easy as they were separate items in different places..
    However, if you remember the Cortina front end.., the shock was inside the spring.
    Now being the cheapskate I am I didn't want to buy the bag and shock combination so ended up moving the shocks inboard and now just in front of the engine..

    Was a bit of a nightmare getting the software sorted to get it working right, but spent all day tweaking it to something that actually works quite well..

    It will initially pump the suspension up to a set level, then top up the air receiver to 8.5Bar.
    After that it will control to the set ride height.
    Have some delays in there to accommodate normal movements and to minimise compressor running.
    I have 4 preset levels and either full drop, or full lift. Should get in that pesky car park on one of them..

    I think there are still some tweaks needed, and final levels to be set up when i have the right wheels etc, but it is not far off it now..

    I was quite surprised how firm it feels so should be a reasonable compromise of ride/handling and comfort.
    At the end of the day can always rip it out if it doesn't work....

    Right cue the ribbing and jibes...
    Dean.
    Lost. 1 portion of common sense! Somewhere between here and last week. If found please have it committed.
    If things are meant to be simple, then I wont do it! Hence why I have a Viper

  2. #2
    Join Date
    Apr 2004
    Location
    Hawkinge, Kent, United Kingdom.
    Posts
    2,123
    We need photos so we can fully appreciate your efforts
    Cobra not quite as shiny as my head

  3. #3
    Join Date
    Aug 2004
    Location
    West Somerset
    Posts
    1,214
    Will get some on when i have taken a few more..

  4. #4
    Join Date
    Aug 2004
    Location
    West Somerset
    Posts
    1,214
    Well here are a couple of the bellows fitted.
    One of the front with the relocated shocks, and one of the rear with the spring replacement.

    (You can see from the date that I started that a while ago!!! Didn't even have the engine in or body on at that point!!)

    There has been some slight changes though.
    The shocks have a strengthening strap on the mountings to give a little more support.
    The air system has been plumbed in properly ( the picture has the testing set-up on it!)

    Will attach a few of the air control system once i have taken some..

    open to ribbing now..
    Attached Images Attached Images
    Dean.
    Lost. 1 portion of common sense! Somewhere between here and last week. If found please have it committed.
    If things are meant to be simple, then I wont do it! Hence why I have a Viper

  5. #5
    Join Date
    Apr 2004
    Location
    East Leake, Nottinghamshire, England.
    Age
    55
    Posts
    9,511
    Just one small question. Can you extend the top arm to the shock on the front as with it at the angle it is at it becomes less effective the more it is compressed as it will in effect lay down. This is why most shocks are vertical.
    Martin

    351W 416.7 HP and 466.8 ft-lbs

    Running Mega Squirt and Edis 8


  6. #6
    Join Date
    Aug 2004
    Location
    West Somerset
    Posts
    1,214
    Fair comment..

    However had to have a slight compromise as it would have hit the chassis if it went higher or longer..
    Also had to avoid the crankshaft damper pulley which nestles between them..

    Did force the suspension through full throw (With and without bellows in there) and movement is on par to the standard setup.
    (that piccy is taken on full compression as the arm is on the bump stop)

    Damping feels pretty reasonable with the weight of a 'fat un' jumping on the front.....
    Dean.
    Lost. 1 portion of common sense! Somewhere between here and last week. If found please have it committed.
    If things are meant to be simple, then I wont do it! Hence why I have a Viper

  7. #7
    Join Date
    Mar 2012
    Location
    tintagel cornwall
    Age
    55
    Posts
    1,507
    Presume can get adjustable shocks if find things too stiff or bouncy never seen them or could maybe use adjustable coil overs without a spring fitted, still trying to find the best all round adjustment combination on my dax few clicks def changes things quite a bit
    Dax 427 kit collected end april 2012, IVA pass first time 6th May 2014.

  8. #8
    Join Date
    Aug 2004
    Location
    West Somerset
    Posts
    1,214
    Here is the first incarnation of the compressor, receiver and controls
    (Obviously pre-wired stage)

    Have modified it since this photo as added a solenoid prior to the receiver to take it out of the circuit initially to get suspension up to ride height quicker..

    This fits nicely in a cubby to the rear of the boot, so does not encroach on the loading (?) space!!!
    Still needs some tinkering but getting there!.
    Attached Images Attached Images
    Dean.
    Lost. 1 portion of common sense! Somewhere between here and last week. If found please have it committed.
    If things are meant to be simple, then I wont do it! Hence why I have a Viper

  9. #9
    Join Date
    Nov 2004
    Location
    Lurgan, Co Armagh, Northern Ireland
    Posts
    340
    i know i'm a bit late getting here Dean, but i LOVE it!
    you sure have been busy!! that looks like a crazy amount of work?! did you buy it as a kit or have you done this before?
    Glad you are getting close with it but im going to warn you about your wheel offsets if you are going for wide ones...I didn't do any major messing with the suspension but still had tons of trouble hitting the bodywork with my tyres trying to get a decent ride height. i've 3 sets of sierra springs knocking about with various turns cut off them and sanded a lot of lip off the arches?
    Also, the wheels move a lot more when one side is allowed to go down as the other goes up...bumps or holes or hard cornering...than when a couple of people are sitting on the corner of it!
    You won't really know until you hit the country lanes and the puffs of smoke come out

    Any more recent pics yet?
    Declan

    RV8, Sierra based Viper.
    I'm sure if I give it enough love it will, someday, love me back!?

  10. #10
    Join Date
    Sep 2001
    Location
    .Poole
    Posts
    1,019
    Dean, have to applaud the effort mate, hope it all works out for you. Dave

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