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P38A Air spring set costs more than individual items at Island

Discussion in 'Range Rover' started by EntropyUK, Aug 29, 2018.

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  1. wammers

    wammers STILL BREATHING. Donater

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    There is no off road setting on the P38 only a wade setting. You need longer shocks and modified sensor rods with gen 3. Nearest thing mine ever gets to off road is mildly moist grass. Mind you my drive is a challenge at times. Steep, twisty and bumpy. Even going over speed humps in wade is uncomfortable. It's a road car with some off road capability not a cross country vehicle suitable for roads. Lots forget that. ;):D
     
  2. 300bhp/ton

    300bhp/ton Well-Known Member

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    I know you know a fair amount about these. But I don’t agree with you on this.

    The p38 is not just a road car. It is a highly capable off road machine. Ladder chassis and live axles and arguably the best axle travel design of any of the Land Rover setups.

    Latter models have 4 wheel off road biased TCS as well as the great wheel travel. Meaning they have the ability to out perform Defenders in many off road situations.

    The handbook clearly states the high suspension mode is for off road

    [​IMG]

    As said. The Gen III’s offer something none of the other air springs offer.

    -A firm controlled spring when going quickly
    -A soft compliant spring when off road

    The ability to gain additional suspension travel from them is just an additional bonus. Above and beyond their main perk.
     
  3. wammers

    wammers STILL BREATHING. Donater

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    I don't think people spent a large amount of money buying one new with the main purpose being to play off road. It for sure has massif off road ability but that is not it's main purpose. As said it is a road vehicle with off road capability not an off roader with road capability. The nearest thing most P38s have been to off road is as said, is parking up on damp grass on a day out or up the kerb to park. There are of course people possibly like yourself that enjoy off roading. But the vast majority of P38s have never been off road.
     
  4. Grrrrrr

    Grrrrrr Technician, Bodgit & Scarper Ltd Full Member

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    Mine goes off road regularly!

    As for the spring rate on the gen III. I read the blurb. I find the firmness of my Dunlops even at motorway height more than adequate, although I prefer to waft in comfort rather than corner like a track-day. I am always amazed how well my P38 soaks up the bumps when off road when sometimes it feels a little harsh on the road. That said, I'd absolutely love to try a set of gen III just to see if the difference is noticeable.
     
  5. Grrrrrr

    Grrrrrr Technician, Bodgit & Scarper Ltd Full Member

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    No problem. I'll try and find them. They were in a black bag at the back of the shed somewhere last time I looked ... possibly in the bottom of a locked filing cabinet with a notice on it saying "Beware of the tiger!".
     
  6. wammers

    wammers STILL BREATHING. Donater

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    In the shed is a funny place to keep porn. ;):D:D
     
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  7. wammers

    wammers STILL BREATHING. Donater

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    Of course it does, with respect it's only worth five bob so it's no problem. But would you have paid £50,000.00 quid for it new and gone off road unnecessarily? I think not.
     
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  8. 300bhp/ton

    300bhp/ton Well-Known Member

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    I suspect when much newer and for the U.K. market. Vast majority is probably correct. For the age p38’s are now and the rest of the world. I suspect it’s the minority that haven’t been off road at some point in their life.

    They are capable and affordable. And in some markets taking newish 4x4’s off road is perfectly normal and far more acceptable than it is in the U.K. Just take a look at the myriad of videos on YouTube.

    At a recent event:
    [​IMG]
     
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  9. 300bhp/ton

    300bhp/ton Well-Known Member

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    P38’s are definitely harsh when in the raised suspension mode off road. They sort of bounce. Being an owner of a modified leaf sprung Land Rover and a heavily modified coil one and access to loran of other Land Rovers. The p38 is arguably the worst for suspension control off road. Due to the stiffness of the air springs at the height.

    I often run my p38 in motor way mod on the road (with the inhibit switch) because it rises better than in the standard mode. Which is really the wrong way round. If it had ACE it’d be not so bad from a handling point of view.

    Don’t get me wrong. The NVH and comfort overall is great in the p38. Bit running the same green lanes in other Land Rovers and comparing to the p38 in the high suspension mode. The p38 rides the bumps the worst.
     
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  10. wammers

    wammers STILL BREATHING. Donater

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    Not knocking you enjoy your sport. Each to their own. ;);)
     
  11. Grrrrrr

    Grrrrrr Technician, Bodgit & Scarper Ltd Full Member

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    Maybe we should contact Arnott and see if they'll do a bulk buy on the gen III for the "Landyzone Owners Club" @ £100 a corner?! I'd be tempted by that.
     
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  12. Datatek

    Datatek Well-Known Member

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    Never understood the claim that Arnott Gen 3's are soft extended and hard at motorway height. To my simple mind it is necessary to increase the air pressure to raise the height, more pressure = harder, much like blowing up a tyre.
    Gen 3's are really only worthwhile for serious off roading.
    I have one P38 on Gen 2's and one on new Dunlops, both on OEM shocks, the ride is certainly more supple on the Arnott's.
     
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  13. 300bhp/ton

    300bhp/ton Well-Known Member

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    +1
     
  14. 300bhp/ton

    300bhp/ton Well-Known Member

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    Info here on how they work.
    https://www.rangerovers.net/rrupgrades/suspension/arnottgen3.html
     
  15. Datatek

    Datatek Well-Known Member

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  16. 300bhp/ton

    300bhp/ton Well-Known Member

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    Ok :)

    Anyhow the bit that explains it is this bit. Note the diagram. And the size of the piston vs the airbag. Comparable spring rates also given.


    If you want a way to visualise how it works. Pretend you have an inflated party balloon in front of you (not over inflated, just blown up).

    If you prod it with the tip of you finger (small surface area) it’ll probably feel quite soft and allow a lot of deformation. Because you are only displacing a small amount of air.

    Now prod it again with the palm of you hand (large surface area). It’ll feel a lot more solid and won’t deform anywhere near as much. Despite the fact the amount of air in the balloon has remained unchanged.

    [​IMG]
     
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  17. Jake Hewitt

    Jake Hewitt Active Member

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    What size are the blocks if you can remember? I've got some 4x4 in the shed and will just cut some myself :)
     
  18. wammers

    wammers STILL BREATHING. Donater

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    4" x 4" is no good. they need to fit in the bump stops. Sizes are in my EAS post in tech archive
     
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  19. Grrrrrr

    Grrrrrr Technician, Bodgit & Scarper Ltd Full Member

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    As per Wammers post. You just need some dowel of the right size to fit inside the bump stop. Or failing that, a broom handle!
     
  20. Jake Hewitt

    Jake Hewitt Active Member

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    Thanks both, found it, now if only I could coax this spring out...
     
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