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Urethane or M3 control arm bushings for autox?

 
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Skrape



Joined: 13 Dec 2002
Posts: 98
Location: Denver, CO

PostPosted: Mon Apr 25, 2005 8:11 am    Post subject: Urethane or M3 control arm bushings for autox? Reply with quote

I'm getting a little more serious about autocrossing my '84 E30 and would like the forum's advice on front control arm bushings.
I've found the solid M3 style bushings, that have an offset for more caster, like so:
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=79 70477688&rd=1&sspagename=STRK%3AMEWA%3AIT&rd=1

I've also found solid urethane bushings with no additional offset, like these:
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=79 70477688&rd=1&sspagename=STRK%3AMEWA%3AIT&rd=1

Will the urethane bushings be stiffer than the solid M3 bushings?
Will the additional caster offered by the M3 bushings negate that effect?

Which would you buy?
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dale



Joined: 22 Aug 1999
Posts: 3085
Location: Seattle, WA USA

PostPosted: Fri Apr 29, 2005 7:32 am    Post subject: Urethane or M3 control arm bushings for autox? Reply with quote

Yes the Urethane is stiffer then the solid rubber. But you really want the extra castor from the M3 bushings, and I think they are stiff enough.
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Steve D



Joined: 09 Aug 2004
Posts: 102
Location: San Diego

PostPosted: Fri Apr 29, 2005 1:25 pm    Post subject: Urethane or M3 control arm bushings for autox? Reply with quote

I agree with Dale - I have the M3 bushings on my e30 track car as well.
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Skrape



Joined: 13 Dec 2002
Posts: 98
Location: Denver, CO

PostPosted: Fri Apr 29, 2005 2:15 pm    Post subject: Urethane or M3 control arm bushings for autox? Reply with quote

Cool - Thanks for the advice! (rushes to garage to find jackstands...)
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