Lists,
I recently responded to Dave Connitt's post on using some type of hard mount
on his 4A steering rack, I was against doing so on a street car. I went on to
opine on my thoughts regarding the general use of Poly mounts on street cars
etc. We all have our opinions.
I have a question for the list on the subject. Specifically the poly mounts
for the IRS Trailing Arm attachment to frame pivot point. Properly installed
rubber mounts rotate by the flex in the rubber itself and not via the through
bolt that clamps the bushing between the mounting ears. That's not the case
with the poly mounts, there is no flex in the poly hence the bearing becomes
the bolt to sleeve interface or the sleeve to poly bush interface or maybe
both. I don't recall for certain but I don't think the metal bushings are long
enough to be clamped between the mounting ears and held stationary forcing the
rotation to be between the bushing and the poly mount and not the bolt shaft
to bushing. Has anyone inspected this installation after a few years of use?
What was observed?
To those suppliers who sell the poly bushing replacements and who read these
lists. Do you know the engineering that applies? I'm using some from a well
known "racing" supplier but I am suspect of the design input. I'm fairly
certain that I'll go back to rubber in the future if I can find an adequate
way to install new ones.
Thanks,
JVV
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