Rear suspension

Discussion in 'Mech Tech' started by Mini_Bungle, Jun 1, 2020.

  1. Is that too near to the suspension limiter to run ?
     

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  2. I’d say yes. A stock height van has the gaps the other way round. Hit a bump, you may knock a bit off the casting.
     
  3. I'm raised not stock
     
  4. Zed

    Zed Gradually getting grumpier

    Grinding the thick bit off would double your rebound and might prevent some banging noises. People certainty used to chop them off for lowering in the bad old days when it was DIY or nothing, though that doesn't make it ok.
    Or
    How about using cranked lowering spring plates the other way up?
     
    davidoft likes this.
  5. Only problem with doing that is with the limit removed on the spring plate the next bit that limits suspension travel is the CV joints and shocks
     
  6. Zed

    Zed Gradually getting grumpier

    Perhaps a better way of ending up in the same place but no actual height gain then? It must be better if your suspension can travel in both directions though or you'll off road and get stuck with one wheel up in the air?
     
  7. mikedjames

    mikedjames Supporter

    Like most twist and cut lowered busses at the front.
    The massive bang is a warning..
     
  8. 77 Westy

    77 Westy Supporter

    Cut a notch in the spring plate so it drops the amount you want but not so much that the CV joint angle or damper rebound limit is exceeded.

    Do you have high angle CV joints and long travel dampers?
     

  9. No and with the limit on the spring plate i don't need them any more drop and i would plus longer drive shafts and i was trying to stay out of that sort of money
     
    77 Westy likes this.
  10. What massive bang ?
    As far as i know i have kept off the stops
     
    Zed likes this.
  11. 77 Westy

    77 Westy Supporter

    Just run it then. There won’t be a massive bang but there isn’t much rebound travel.
     
    snotty likes this.
  12. mikedjames

    mikedjames Supporter

    If you cut off the stops, the next thing that happens is the driveshafts can pull out of the CV joints at maximum lower extension.
     
  13. I’d be concerned that notching the spring plate would cause a stress crack.
     
    1973daisey likes this.
  14. Maybe if the stop on the casting was ground off to allow more travel
    Then a strap fastened between the the top and bottom damper mount a bit shorter in length than the full travel of the damper would work
     
  15. The circlip should prevent it pulling out
    I’d guess that a stock damper would reach its full travel and/or the cv bind up before the shaft was in danger.
     
  16. Stick some blue tack on the bottom stop
    If the spring plate hits it whilst driving it will leave a mark.

    Did you raise it by moving the plate on an outer spline?
     
  17. Yes just one outer spline to make the van level after winding the front up on adjusters
     
  18. 77 Westy

    77 Westy Supporter

    No risk if the notch is cut carefully with no sharp corners. It’s only 2 or 3 mm at the spring plate to get 3 or 4 cm at the wheel, but don’t quote me on the numbers it’s just a guess and I can’t be bothered to work it out.:)
     
  19. I think I'm going to fiddle with inner and outer splines and go down a centimetre and give my self a bit more clearance .

    I'm a bit worried about getting stuck somewhere if the wheel can't drop and becomes unloaded instead
     
  20. mikedjames

    mikedjames Supporter

    I think theres a trick way, same move as bench assembly at high angles that the entire core of the CV joint pops out, rotates and sometimes pops back in leaving you with a CV joint boot wrapped round the drive shaft.

    I used to read the Hasta Alaska trip 'blog' on thesamba, amongst many stupid things he managed to twist a CV boot round the drive shaft going airborne on dirt roads in Central America.
    He got on my nerves in the end by managing to do everything wrong despite being taught and helped a lot along the way. He was in it for the image..
    The circlip will facilitate this by pulling hard... but avoid it just falling out by sliding sideways out of one CV joint completely

    EMPI used to sell long drive shafts with allowance for the CV joints to slide on the splines for big wheeled Baja buggies.
     
    Last edited: Jun 2, 2020
    Mini_Bungle likes this.

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