Page 2 of 11 FirstFirst 1234 ... LastLast
Results 11 to 20 of 105

Thread: Parabolic leaf springs

  1. #11
    Join Date
    Jan 1970
    Location
    PERTH WA
    Posts
    842
    Total Downloaded
    0
    If you can afford them...get them!! They are ace!Had them on my SWB SIII and dare I say, almost like coils!

  2. #12
    Join Date
    Feb 2008
    Posts
    42
    Total Downloaded
    0

    Smile

    G'day,

    I am not sure if any one sells them in australia... (maybe in WA I heard of some one selling them) But I know that a few years ago TI Console used to make a 2 leaf parrabolic spring and a extra one under it that would only be doing any thing when there is a load in them. Has any one heard of them?

    Cheers
    Ben

  3. #13
    Join Date
    Feb 2004
    Location
    Williams West Aust
    Posts
    20,998
    Total Downloaded
    0
    Lots of people say they are no good for carrying weight in a 109.
    Suerly a set of airbag helpers(similar idea to the coil airbags) would fix the problem.Would fix the towing problem too.
    Andrew
    DISCOVERY IS TO BE DISOWNED
    Midlife Crisis.Im going to get stuck into mine early and ENJOY it.
    Snow White MY14 TDV6 D4
    Alotta Fagina MY14 CAT 12M Motor Grader
    2003 Stacer 525 Sea Master Sport
    I made the 1 millionth AULRO post

  4. #14
    olmate Guest
    Quote Originally Posted by lro11 View Post
    does anyone know if you can still fit the axle strap with these springs mine sits a bit higher but I dont have any weight on it yet?
    Rocky Mountain provide you with the correct axle straps for the veh / setup that you purchase. No probs there.

    Just dont buy the cheaper ones. If they work -my research suggests that you will only get about 12 months out of them; hence spending more money for better quality (Rocky Mountain). As for shocks - Pro Comp have been great. Rocky Mountain do offer OME but I stayed away from these after issues in the past and negative reports form other users.

    All I can say is - if you want the paras be prepared to spend some cash... but the difference is outstanding, loaded or unloaded.

  5. #15
    Join Date
    Jan 1970
    Location
    Hunters Hill, Sydney
    Posts
    105
    Total Downloaded
    0
    so how much is a lot troy? or is that classified information! if only the mrs knew eh.

  6. #16
    Join Date
    Aug 2006
    Location
    WA
    Posts
    13,786
    Total Downloaded
    0
    Quote Originally Posted by olmate View Post
    Rocky Mountain provide you with the correct axle straps for the veh / setup that you purchase. No probs there.

    Just dont buy the cheaper ones. If they work -my research suggests that you will only get about 12 months out of them; hence spending more money for better quality (Rocky Mountain). As for shocks - Pro Comp have been great. Rocky Mountain do offer OME but I stayed away from these after issues in the past and negative reports form other users.

    All I can say is - if you want the paras be prepared to spend some cash... but the difference is outstanding, loaded or unloaded.
    Fitting check straps defeats the purpose of fitting softer springs IMO...

    I threw my check straps away when I rebuilt my IIA in 1995. I have taken it offroad heaps of times since then, and in 1998 I fitted custom springs that give me about 15" of wheel travel front and rear - with no problems. OK - I snapped the eye off a front shock once, but it was probably old and weak, and I just welded it back on.

    If anyone doesn't want to spend the money on paras, you can build custom semi-elliptic springs which won't quite be as comfortable on-road (but much better than standard), but will be as good or better off-road. If there is any interest, I will dig up the thread I posted on mine.

    This is a long way from full travel.


  7. #17
    Join Date
    Jan 1970
    Location
    Hunters Hill, Sydney
    Posts
    105
    Total Downloaded
    0
    ben i'm interested mate! how did u do them? i'd LIKE parabolics, but alas, they are a lot of dosh. i'm also interested in doing some touring down the, have u done much with your springs? are they just cut down? cheers

  8. #18
    Join Date
    May 2007
    Location
    Teesdale
    Posts
    454
    Total Downloaded
    0
    Thanks Ben, looks awsome!! I'd be interested in getting more info

  9. #19
    Join Date
    Aug 2006
    Location
    WA
    Posts
    13,786
    Total Downloaded
    0
    Quote Originally Posted by Bisho View Post
    ben i'm interested mate! how did u do them? i'd LIKE parabolics, but alas, they are a lot of dosh. i'm also interested in doing some touring down the, have u done much with your springs? are they just cut down? cheers
    Hi Bisho - Have I done much touring you ask...

    Have a look here...
    Bris-Perth - So far so good

    On page 3 of the above is a post I cut and pasted from Outerlimits (also below). It is a bit terse/short, so let me know if you want/need more info:

    Note - since posting this I think there is a bit more room to move on SWB springs - the SWB I built for my Dad had VERY soft springs, but I think that wasn't typical. If you let me know what spings are fitted (number of leaves and thickness) to each corner of your landie, what body style, any mods, and what you want to use it for, I am happy to advise what I think would work.

    Front.
    The best front springs are the std 9leaf SWB petrol springs (200lb/in) - these have one 4.4mm main leaf and 8 4.2mm leaves - it is hard to find a good second hand set. They will work on all LR's except a 3.9 ISUZU. If you have these springs just cut a taper in the leaves, smooth up the edges and that is all. I didn't have these so I bought after market SWB petrol spings that have 9x5mm leaves so the rate is 315lb/in!!! - I removed 3 leaves (so now 6), tapered and smoothed the edges and had them reset to about 11" free camber (drivers) and 10.5" passenger. If you have a military LR, remove the bump stop spacer but retain the std shock. If you have a civilian LR, you can usually get a lot more up-travel than the bump stop will allow. I know people who have cut the bump stop in half, but you can also relocate the shock mount higher and fit longer shocks.

    Rear.
    For a SWB - again the std factory leaves are best - should be 11x4.4 (longer leaves have a lower spring rate) with a rate of 160lb/in. Again if you have these, taper the leaves.
    For a LWB - you want a rate of about 270lb/in. I had std military 8x7.1mm springs, which are 400lb/in. (S3 9x7.1mm are 500lb/in!!!). I removed 3 leaves (now 5), cut the rest down to an even spacing and tapered them. And had them reset to about 14" drivers side and 12" passenger. All it cost me was $60 a pair to reset - make sure they temper them after resetting. They will settle a bit after you have them on the truck, that is why the free camber is so high. You could go a bit softer but 270lb/in still lets me carry a decent load as well.
    For a military truck, leave the rear bump stop spacer in and fit Range Rover rear shocks. For a civilian, RR shocks would work as well but you need to raise the shock mount (and have to cut a hole in the floor for space).

    You will get increased on road comfort with this setup, and more body roll, but the truck is just as stable when cornering, and you get used to the body roll. If you have an engineering background, grab a book called the "leaf spring design manual" by the SAE. It is what I used. But if you just follow the steps above you won't need it.
    EDIT - make sure the guy resetting your springs tempers them after the reset, as they won't hold their set as well as if they are set cold.

    I originally posted some pics to accompany this info, (but they have been lost from the original thread) so if anyone wants I can dig them out... and repost them

    Outer Limits 4x4 Board :: View topic - Parabolic results with standard springs? (Series Leafer Cont

    Outer Limits 4x4 Board :: View topic - Parabolic springs...
    Last edited by isuzurover; 15th February 2008 at 11:32 PM.

  10. #20
    Join Date
    Jul 2006
    Location
    East-South-East Girt-By-Sea
    Posts
    17,578
    Total Downloaded
    0
    Quote Originally Posted by isuzurover View Post
    ....This is a long way from full travel.
    I think that is outstanding articulation on leaf springs - why would you go to the trouble of re-engineering a series vehicle with coils when parabolics can do that.

    Note to self: Must put pennies in piggy bank for new RMP's

    Diana

Page 2 of 11 FirstFirst 1234 ... LastLast

Bookmarks

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Search AULRO.com ONLY!
Search All the Web!