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Old Sep 30, 2010 | 05:50 PM
  #2741  
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bky
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I have a Speedway bar, with custom bent arms.
One thing to keep in mind that NASCAR parts are SAE (3/8" holes in the arm). To fit metric end links, I had to get 10mm drill bits.
Old Oct 1, 2010 | 04:19 AM
  #2742  
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Originally Posted by IntegraR0064,Sep 30 2010, 11:03 AM
they is speedway, on that page they say "They are available pre-bent and heat treated with a 3 ¼” offset ( see picture below ) or you can buy them unbent, bend them yourself and have them heat-treated locally."
I bought blank arms from them over a year ago and when I spoke to them on the phone they said no need to heat treat.


I don't think there is a wrong answer - but my arms haven't failed yet.
Old Oct 1, 2010 | 04:46 AM
  #2743  
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Originally Posted by bky,Sep 30 2010, 07:50 PM
I have a Speedway bar, with custom bent arms.
One thing to keep in mind that NASCAR parts are SAE (3/8" holes in the arm). To fit metric end links, I had to get 10mm drill bits.
I just ran imperial sized endlinks. A proper bolted connection relies on the clamp load of the bolt/nut to keep it from moving, not how tightly the bolt fits in the hole. Precision-sized bolt holes are used to locate the parts precisely before the clamp load is applied. We don't really care about that for swaybars given that we have adjustable endlinks.

If you want to run 10mm, here are two handy drill sizes that are likely easier to find:
25/64" = 0.391" = 9.922 mm --> 0.003" undersized. Wobble that puppy in the hole slightly to fit.
'X' drill = 0.397" = 10.084 mm --> 0.003" oversized.
Old Oct 1, 2010 | 04:57 AM
  #2744  
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Guys,

My co-driver, Mark Mays, is trying something a bit... let's say "creative". He upgraded his 2006 MX5 front sway bar so it was just laying around in his garage. Since it looked like a pretty generic/straight, he thought it might work with my S2000.

So last night, we were able to put this little sway bar on the back of my car with very little modifications...
- Just had to drill the Mazda brackets to make the holes a bit oblong so the bar sat lower for more clearance.
- Move the bushing keepers that were on the bar to another location.
That's it!

Unfortunately, we have not tested the little bar out yet, but if it works out, we should be able find these for almost free, as I am sure many MX5 owners have tossed these to the side after their 1st autocross. LOL

If this works but we need different stiffness levels, we can now look for MX5 FSB options.

Wish us luck on the test this weekend.

-Dave
Old Oct 1, 2010 | 06:10 AM
  #2745  
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Originally Posted by daverx7,Oct 1 2010, 04:57 AM
Guys,

My co-driver, Mark Mays, is trying something a bit... let's say "creative". He upgraded his 2006 MX5 front sway bar so it was just laying around in his garage. Since it looked like a pretty generic/straight, he thought it might work with my S2000.

So last night, we were able to put this little sway bar on the back of my car with very little modifications...
- Just had to drill the Mazda brackets to make the holes a bit oblong so the bar sat lower for more clearance.
- Move the bushing keepers that were on the bar to another location.
That's it!

Unfortunately, we have not tested the little bar out yet, but if it works out, we should be able find these for almost free, as I am sure many MX5 owners have tossed these to the side after their 1st autocross. LOL

If this works but we need different stiffness levels, we can now look for MX5 FSB options.

Wish us luck on the test this weekend.

-Dave
What is the rate of the Miata bar? I did a little investigation on a bar between my S2000 bar and nothing but gave up. For now I'm going to continue using my factory S2000 rear but I like tuning options.
Old Oct 1, 2010 | 06:17 AM
  #2746  
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NC MX-5 Front Bar = 21mm diameter with a 2.6mm wall thickness.
Old Oct 1, 2010 | 06:41 AM
  #2747  
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Originally Posted by imstimpy,Oct 1 2010, 10:10 AM
What is the rate of the Miata bar? I did a little investigation on a bar between my S2000 bar and nothing but gave up. For now I'm going to continue using my factory S2000 rear but I like tuning options.
I'm not very technical when it comes to car stuff, but I can tell ya it feels significantly lighter that my '01 bar. I am sure that info is documented somewhere.

Oh... I forgot to mention that we used the stock S2000 endlinks.

-Dave
Old Oct 1, 2010 | 08:45 AM
  #2748  
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Dave -

If you can provide the bar dimensions as indicated on page six of the PDF in the thread below we can estimate the rate.

https://www.s2ki.com/forums/index.php?showtopic=818884
Old Oct 1, 2010 | 09:02 AM
  #2749  
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215.9mm moment arm
822.3mm long
Old Oct 1, 2010 | 09:19 AM
  #2750  
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Thanks Nick!!



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