Control arm bushing q's

[mr.utility at highstream.net (David Utley)]

Ihhnnnntersesting...  Yeah, I may have blurred the line between the two, 
because of previous experience with poly motor mounts, so you may be right all 
the way around...  Time will tell, the pickup has poly mounts on the front 
suspension, even the rack (I think there may be some vibration there, what are 
your thoughts?)...  It will be interesting to see...

Cheers,
  David

Quoting Brett VanSprewenburg <brett@netacc.net>:

> 
> It is true that poly is less forgiving and harder then the rubber 
> components they are
> designed to replace, but the bushings get a bit of a bad rap due 
> primarily to the
> poly motor mount replacements.  My observations have been that harder 
> motormounts
> will most definitely transmit more vibration to the cabin, and most 
> folks draw a
> similar conclusion about hard poly replacements elsewhere on the car. 
> IMO, and
> some experience, I'd have to say that using the poly bushings on the a-arms
> contribute only a small addition to noise or harshness to the cabin through
> the
> suspension.  Upper poly type suspension bushings are going to have a 
> far greater
> effect here, for instance.  The poly bushings in the a-arms are far more
> likely
> to have a positive impact combating unwanted lower a-arm deflection.  This
> reduces odd / unpredictable toe, caster and even camber changes under
> specific loads.  This is especially true if the rubber bushings are tired.
> 
> In summary, I think poly's got a bad rap due to the motormount vibration.
> Poly
> upper strut bearings are likely to have a more adverse impact on ride
> quality,
> and I've never been bothered by them after riding on them for years.
> Poly lower a-arm bushings are more likely to have a positive impact on
> unwanted alignment changes under load, and have less impact on ride quality
> (but will probably have some, IMO, worth the benefits).  Again, just another
> datapoint and another persons opinion to consider.  It is your car afterall,
> and it's nothing you cannot change again if you don't like it.
> 
> ==Brett
> 
> 
> >You sure you want to go poly? 
> >
> >   They are cheaper, but they are a lot harder...  A1 chassis is a lot more
> >likely to transmit noise/harshness to the cabin than the B1 would be...
> >
> >Go with what makes you happy, I just thought I would throw that out
> there...
> >
> >David Utley
> >
> >Quoting "doubt@inwave.com" <doubt@inwave.com>:
> >
> >>  All,
> >>  My '81 started making horrible vibrations/rattles/bounces/jounces, etc.
> the
> >>  other day, and judging by what I learned with my Quantum I need to
> replace
> >>  the control arm bushings.  I found a set on Potterman's site (poly, both
> >>  sides for $28, not bad!), I just have to order them and install them. 
> Any
> >>  tips/tricks/precautions would be greatly appreciated.  I did my Syncro's
> >>  front bushings, so I sorta know what I'm getting into, but A1  and 
> >>B2 chassis
> >>  aren't exactly twins.
> >>  Thanks!
> >  > Nate
> >
> >
> >David Utley
> >-----------
> 
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David Utley
-----------
Cable Volkswagen
405-470-3129
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