Suspension Brakes Sway Bar End Links

Discussion in 'Tuning and Performance' started by leicaguy, Sep 22, 2010.

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  1. minimark

    minimark Well-Known Member

    Jun 24, 2009
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    Doubt that they broke from one strong bind but from repetitive stress over time.....
     
  2. BThayer23

    BThayer23 Well-Known Member

    Jun 12, 2009
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    It's a question of shear stress vs axial stress. The swaybar is subject to a twisting motion (torsion), which creates shear stress within the steel. The endlink has bushings on either end that isolate it from the bending moment, so it's only in tension or compression. A thin steel rod handles tension and compression better than torsion, as long as the forces don't reach the yield strength. And yes Mark, failure was probably due to metal fatigue.

    Makes me want to call up my parents and tell them that my college degree was actually useful. =)
     
  3. Metalman

    Metalman Well-Known Member
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    So is it safe to say, if you go larger than stock on the sway bar, go to heavier duty end links? Or does the stock end links have a large margin of safety built in?
     
  4. Onasled Racing

    Onasled Racing New Member

    Jul 19, 2010
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    Drop links do take a certain amount of non-linier (don't think that's the term I am looking for) forces. All has to do with the angle of the sway bar ends and why one needs to think about how many degrees out of perpendicular to the drop links they are running. Once the angle is out of 90* to the drop links, side forces start being applied. This actually causes a "progressive" rate in the sway bar.
    Anyway, the fronts are always undergoing non-linier forces and it's why they break
     
  5. maacodale

    maacodale Club Coordinator

    May 7, 2009
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    Don't forget, the most important thing concering sway bar links is the heim joints. Those fail more often (and wear out more often) that the actual link, itself.

    On our Legends cars we'd replace heims at the start of each season and still would end up with 3 or 4 new heims by the end of the season.
     
  6. Onasled Racing

    Onasled Racing New Member

    Jul 19, 2010
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    Really...? What's up with that do you think? What do those things weigh, 1200 lbs? I know you guys race those things like every weekend so maybe it's just that.
     
  7. Mike S

    Mike S New Member

    Aug 18, 2009
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    Anybody know what the lengths of a slightly dropped suspension's end link should be?

    I'm installing the Powergrid ones, but I have misplaced my OEM ones. Car has been on jacks for half a year.
     
  8. Metalman

    Metalman Well-Known Member
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    I would have suggested you try the NM engineering end links, not much difference in price and seem to be much better than stock and being partially aluminum, will probably be lighter than the Powergrid. They make good stuff.
    I don't know the length of a "slightly" dropped MINI, but if you follow the instructions and keep the bar arms level, you'll be good.
    http://www.nm-eng.com/media/attachments/203_328856_ins.pdf
     
  9. grodenglaive

    grodenglaive New Member

    Apr 3, 2010
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    Hi Mike,
    The OEM ones are 9.25" measured from the centre of the bolts (mine are sitting in the basement, so it was easy to measure).
    I believe you'll need to shorten them about the same amount as the car is lowered, so the swaybar is parallel to the ground when the car is sitting level on all 4 wheels.

    didn't see metalman's post. What are we all doing up so early on a Sunday?
     
  10. Metalman

    Metalman Well-Known Member
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    I'ma eatin a donut I missed out on yesterday with my MOM peeps......:D
     
  11. grodenglaive

    grodenglaive New Member

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    drinking coffee, measuring endlinks, wishing I had a donut.
     
  12. Metalman

    Metalman Well-Known Member
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    ^^^ There is this Canadian dude by the name of Tim something or other... Norton maybe.... Tim Norton's..... No that's not it, but I'm close.... Anyway he's been known to sell a few..... If you can't find him locally, stop by my place, I still have a few un-touched....:D
    On the 9.25", I'm guessing that's the rear end link length, the fronts are different....:Thumbsup:
     
  13. Mike S

    Mike S New Member

    Aug 18, 2009
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    Thank you so much! I forgot to mention, my car is a R53 and I didn't notice this was in a 2nd gen forum :( I wouldn't think there would be too big difference between the two seeing that some suspension parts are inter-changeable.

    Good point! grodenglaive, can you confirm if this is for the front or rear? :D
     
  14. grodenglaive

    grodenglaive New Member

    Apr 3, 2010
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    oh yeah, that's for the rear, I just assumed you were doing the rear sway bar. The fronts are 11 and 3/4 btw.
    never did get that donut - if only there was a Jim Norton's nearby:ihih:
     
  15. Mike S

    Mike S New Member

    Aug 18, 2009
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    Thank you so much! If I'm ever stateside, I'll send one your way :donut1:
     
  16. k-huevo

    k-huevo Club Coordinator

    May 6, 2009
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    Lengthen the front drop link, shorten the rear. Start with 305mm center-to-center in the front for .5 - 1 inch lower. Shortening the front link will run the risk of contact with the driveshaft under full compression.
     
  17. Mike S

    Mike S New Member

    Aug 18, 2009
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    Thank you Keith!
     

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