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Motorsports & Track Forum
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Old 05-07-2010, 10:28 AM   #1
Kubica
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H&R rear sway bar help

Ok just a small question- didn't want to post in the general section.

I bought a used rear H&R non-m sway bar for the xi. Upon closer inspection, it looks like i got 20mm OEM BMW rear sway bar bushings, instead of the 21mm bushings that come with the H&R bar new.

Can I use the 20mm bushings on a 21mm bar? Or is that a complete no-go? Is it safe to shave 1/2mm from the inside diameter of the bushings?

If not, should I go with the 21.5mm M3 bushings?

Thanks guys- I have no experience with sways and I was hoping to get them on tomorrow because I'll have a nice place to test the new setup on Sunday. Otherwise I guess I'll have to order new bushings from H&R.
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Old 05-07-2010, 03:38 PM   #2
Kubica
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Dumb question? Anyone care to speculate?
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Old 05-07-2010, 03:44 PM   #3
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I don't think going 21.5 on a 21 bar is a good idea. making the 20s fit the 21 should be fine however it all depends on what you're doing with the car. Track, I wouldn't risk it. Street not much that can go wrong.
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Old 05-07-2010, 05:59 PM   #4
Kubica
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Originally Posted by nk_zhp View Post
I don't think going 21.5 on a 21 bar is a good idea. making the 20s fit the 21 should be fine however it all depends on what you're doing with the car. Track, I wouldn't risk it. Street not much that can go wrong.
Thanks. I'm either going to tape up the bar and use 21.5mm, or shave the 20mm bushings until I can get my hands on some 21mm bushings.
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Old 05-07-2010, 06:08 PM   #5
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Thanks. I'm either going to tape up the bar and use 21.5mm, or shave the 20mm bushings until I can get my hands on some 21mm bushings.
The torsional forces on the bar a pretty strong, I bet that tape will fall apart in less than a year.
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Old 05-10-2010, 10:12 AM   #6
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Cool, I shaved them down a bit- seems to be working ok.
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