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Thread: Defender 130 Suspenision Upgrade

  1. #1
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    Defender 130 Suspenision Upgrade

    Hi All

    Im looking at upgrading the suspenion on my 130 defender. It's currently fitted with standard oem shocks and dual springs in the rear end. It is set up with touring boxes on the rear with 120l fitted under tray. I suspect im carring approx 750kg min. Presently it sit low at the back due to the weight rear of the axle. I have a set of poly air bags fitted, but they dont quite cut-it.

    Im thinking about fitting a full set of iron man foam cell shokers and medium duty springs. Any comment welcome re this equipment.

    I need to know if the Ironman gear is up to task and also when fitting the new springs in the rear do i remove both the outer and inner spring and just fit the one upgraded spring.

    50% of my travel is on rough NT roads, so i need to fit the gear that will go the distance.

    This vehicle is being set up for a Cape trip via the Savannah Hwy in June 2010 so i want to get is right.

    Any help would be great

    Thanks Dan

  2. #2
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    I most definately would not fit any type of foam cell shock to it. Its heavy and its going to be used endlessly on rough roads. These are both key factors in overheating a shock and foam cell shocks don't recover from that. I would be fitting a monotube like Bilstein without a doubt. Personally, I wouldn't even go twin shell like OME, Koni, Monroe etc for that application.

    If it needs to do that day in and day out as it sounds those shocks are going to cop a total flogging. If that were me and the $ stretched, I would look at a dual setup on the rear, but it depends on what you want, can afford or will settle for, but remember that most of your handling on those dirt roads will come from your shocks.
    Cheers
    Slunnie


    ~ Discovery II Td5 ~ Discovery 3dr V8 ~ Series IIa 6cyl ute ~ Series II V8 ute ~

  3. #3
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    I think that changing to medium duty springs is not going to help you in the least.

    If you're sagging in the rear with original 130 dual springs, plus polyair bags, then I think either your springs are stuffed or you are carrying too much.

    iirc the rear springs on a 130 are designed to carry 1000kg. Maybe it's time to visit the weighbridge.

    Cheers
    Simon

  4. #4
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    Thanks for the info, i intend to visit the weigh bridge on return to Darwin so i can see what im dealing with. I would think that the springs are on their way out for a start

    Dan

  5. #5
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    I'm running single heavy springs with LTR shocks. I have found it a great set up but it was done before I owned the beast. I believe it is quite an expensive set up.

  6. #6
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    Quote Originally Posted by abaddonxi View Post
    <snip>
    iirc the rear springs on a 130 are designed to carry 1000kg. Maybe it's time to visit the weighbridge.

    Cheers
    Simon
    I think it's a 1300kg payload.....

    I know of one 130 DC that uses Lovells (by the look of them) HD springs and the OE inner springs.
    I calculated the rate of the new rear springs at 540lb/in, and the inners are 140lb/in and it still rolls and wallows with it's camper body on the back. IIRC it tares over 3000kg.
    It also has TJM dampers, and it really needs them to be dual per side. I really wanted to build a set of Koni's for it but too many $$ for the owner and it's now being sold.

  7. #7
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    The other option, budget allowing, would be dual Tough Dog Ralph dampers and perhaps HHD King Springs.
    Regards,
    Jon

  8. #8
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    Hmmm.... Me thinks you need to visit that weigh bridge.

    Be strict about what you carry. Travel light - Your truck will thank you for it.

    M

  9. #9
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    When you say "it sits low at the back"
    what sort of figures are we looking at?
    If you get a chance measure your front and rear bump stop clearances, ideally empty and loaded.

    Your usage seems very similar to mine. I find the spring rate about right. Not too harsh when empty, a little light (wallowy) when first heading off on a big trip (150L dieso, 200L boat fuel, 100L Ice, gennie, 150kg of gear in space cases, towing 750kg boat trailer) but once the fuel load diminishes or Ice is gone the spring rate is perfect.

    What the 130 dose suffer from when loaded on corrugated roads is under damping. I now have the brackets made up just need to bolt them on. At this stage it will be a single Bilstein per side when around town and then Ill bolt on a second per side when on a trip.

    Steve
    '95 130 dual cab fender (gone to a better universe)
    '10 130 dual cab fender (getting to know it's neurons)

  10. #10
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    Thanks

    Hi all

    Thanks for all the info, im heading back into Darwin on Saturday, so i will do some figures and see what i come up with, It should shed some more light on what im dealing with. The truck has done over 200 000kms already so im hoping it will just be a matter of renewing what ive got.

    Im doing the research on the "Billi's" in the mean time.

    Cheers Dan

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