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Thread: Rear air bag specs.

  1. #1
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    Rear air bag specs.

    Does anyone here have the measurements and any specs for the D3/D4/RRS rear air bags?

    Looking for diameter, minimum and maximum length first.
    Could they be used without the shock through the guts by making up a dummy shock or similar?

  2. #2
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    Having dug up a few more pictures. Does anyone have measurements for the front too?

  3. #3
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    The rears from bottom airspring mount (not shock mount) to top of the neck on the top plate is approx 250mm closed against the internal helpers/stops and 390mm open. The dia is approx 180mm.

    The fronts approx 320mm open but only close by about 45mm before hitting the internal helper/bump-stop blocks. Approx 140mm dia.
    MY21.5 L405 D350 Vogue SE with 19s. Produce LLAMS for LR/RR, Jeep GC/Dodge Ram
    VK2HFG and APRS W1 digi, RTK base station using LoRa

  4. #4
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    Thanks Graeme. I was just trawling (not trolling) through your LLams thread looking for any info.

  5. #5
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    Quote Originally Posted by Graeme View Post
    The fronts approx 320mm open but only close by about 45mm before hitting the internal helper/bump-stop blocks. Approx 140mm dia.

    Interesting. That rubber helper must be why you easily get a big thump from the front when you hit a pot hole at high speed on bumps that even a D1 has no trouble with. It is better on Llams +30 but still easy to get that suspension bottom out feeling on gravel roads.


    Bob

  6. #6
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    Thanks Graeme.

    Is that close by hand or letting the whole vehicle compress them stationary? Would there be access to that internal bumper with the bag off the shock?

  7. #7
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    Hand pressure only - I have 2 flogged-out sets in the shed, 1 with airsprings and 1 bare shocks. The bump rubber is about 30mm long (from memory) and fairly soft so probably compresses a lot. The shock piston will push in more than the full length of the rubber which just sits on the shaft between the top of the shock body and the top plate of the bag. I had considered carrying several spare rubbers to fit if an airspring failed on an outback trip - probably rather firm but better than nothing.
    MY21.5 L405 D350 Vogue SE with 19s. Produce LLAMS for LR/RR, Jeep GC/Dodge Ram
    VK2HFG and APRS W1 digi, RTK base station using LoRa

  8. #8
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    Quote Originally Posted by BobD View Post
    Interesting. That rubber helper must be why you easily get a big thump from the front when you hit a pot hole at high speed on bumps that even a D1 has no trouble with. It is better on Llams +30 but still easy to get that suspension bottom out feeling on gravel roads.
    Even off-road height sometimes doesn't provide enough upward travel of the wheel to prevent the bashing but agree that +30mm can make quite a difference. The next Disco should have more travel, judging by the higher OR2 height and overall travel on the current RRV/RRS that uses the same platform but may still need some help from Llams at speeds above the OR2/OR1 thresholds.
    MY21.5 L405 D350 Vogue SE with 19s. Produce LLAMS for LR/RR, Jeep GC/Dodge Ram
    VK2HFG and APRS W1 digi, RTK base station using LoRa

  9. #9
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    How much do you know about the L322 airbags Graeme?

    I'm looking at airbag options for the classic rangerover. Ideally I'd like 8" of stroke. Stock ones are 6" stroke but I think landrover have also made significant gains in ride quality and air spring curves in the last 20 years.

  10. #10
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    Dougal, I spoke with air bag man about longer bellows, they gave me a part number for some and open and closed lengths, from memory was over 10" of travel. Will see if I can find where I wrote it down.

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