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Thread: LR air strut suspension

  1. #11
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    Cant wait to see the drawings,,
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  2. #12
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    Quote Originally Posted by roverrescue View Post
    Big question is what are the dimensions of a front strut or better still does anyone have a dead one kicking around???

    I have two L322 front struts I replaced last Xmas but have not got around to throwing out. Too bad you're not closer, you could have them.

    rnb000750_6__1.jpg
    Ron B.
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    2003 L322 Range Rover Vogue 4.4 V8 Auto
    2007 Yamaha XJR1300
    Previous: 1983, 1986 RRC; 1995, 1996 P38A; 1995 Disco1; 1984 V8 County 110; Series IIA



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  3. #13
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    Thanks for the offer Ron
    The bottom mount of those looks a little more challenging to adapt
    Seems the d3/4 is a simple eye mount lower with bolt plate upper
    Should be pie to adapt to a axle/radius arm mounts

    S

  4. #14
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    This might be a better view of the lower mount:

    s-l400.jpg
    Ron B.
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    2003 L322 Range Rover Vogue 4.4 V8 Auto
    2007 Yamaha XJR1300
    Previous: 1983, 1986 RRC; 1995, 1996 P38A; 1995 Disco1; 1984 V8 County 110; Series IIA



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  5. #15
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    D3/D4 shocks...lengths are bottom pin centre to top mounting plate.

    front open 570mm, closed 530mm, closed without helper/bump block 490mm, max dia 140mm (top mount)
    rear open 580mm, closed 440mm, closed without helper/bump block 430mm, max dia 180mm (top mount)

    MY12 D4 rear shocks have same open length but a longer closed length of perhaps 30mm IIRC, presumably due to longer helper/bump block.
    MY12 RRV 4.4 TDV8 AB, +LLAMS, +e-diff, +ACC stop/go. Produce LLAMS for LR/RR, Jeep GC/Dodge Ram
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  6. #16
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    Graeme
    Thanks a million for those dimensions - absolutely perfect and much more compact than I would have guessed!!! I'm sure I can make these work on a trailer

    Now next question do the d3/4 have published axle loads at tare and GVM????
    The 40mm of free travel of fronts will be insufficient but I fear the rears might have too much mojo if they have an axle load rating of 2800kg or so????

    It goes to show how vital traction control is on the new discos though eh
    40mm of total travel at front and 140mm at rear is pretty limited!

    Steve

  7. #17
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    40mm strut travel would be 100mm+ at wheel.
    Chris


    2014 D4 TDV6
    1954 86"
    1963 2A Forward Control (getting the full treatment, Isuzu 4JH1, MYY5T, LT230, Toyota Axles, extended cab ++)
    1980 Stage 1 v8 (gone)

  8. #18
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    Helper/bump stop compression is considered to be a practical part of the travel, but to what extent I cannot readily determine. Same applies for the fully-extended lengths with the internal bump-stops that don't get removed when removing the air-springs from the shocks.
    MY12 RRV 4.4 TDV8 AB, +LLAMS, +e-diff, +ACC stop/go. Produce LLAMS for LR/RR, Jeep GC/Dodge Ram
    VK2HFG and APRS W1 digi

  9. #19
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    If you use a D3/4 strut you would have to run say a double wishbone setup, or a long transverse arm which would mean camber change as the wheel swung though its travel?
    Chris


    2014 D4 TDV6
    1954 86"
    1963 2A Forward Control (getting the full treatment, Isuzu 4JH1, MYY5T, LT230, Toyota Axles, extended cab ++)
    1980 Stage 1 v8 (gone)

  10. #20
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    I have decided this thread is currently useless

    In order to improve its usefulness
    And perhaps illustrate just how perfect a d3/4 strut is going to be
    See images below (excuse the iPhone head tilt)

    This is my old girl trailer running a 50mm axle with Landy stub axle flanges
    On 235/85R16
    Dampers are vertical
    Tape tells the story - perfect length for Graeme's rear strut measurement

    On the new build the lower eye will mount below axle tied in with radius arm mounts
    Upper mount will be angled back at tangent of the arc scribed by radius arm
    Upper mount will have to be adequately beefed - will likely build an inverted v style strut mount from chassis rail up to near hull bottom back down to keel support with lateral bracing to guard

    Now I have some measurements it's CAD time

    SteveIMG_6031.jpgIMG_6032.jpgIMG_6031.jpgIMG_6032.jpgIMG_6031.jpgIMG_6032.jpg

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