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Registered
Join Date: Apr 2002
Location: Santa Clara, CA
Posts: 5,668
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I'll try to address some of the comments/questions.
Low-Friction Mounts solve a design limitation of the 911 suspension. The factory made no provision to ensure alignment of front/rear mounts of the control arms in the vertical plane. If the mounts are out of alignment binding will occurr with any hard compound bushing including delrin, polyurethane and PolyBronze.
Not all cars have the mount mis-alignment issue. Cars with frontal impact damage or pan replacements are sure to have some misalignment. Other cars may have misalignment due to to the ravages of up to 40 years of potholes and potentially poor alignment from the factory.
My recommendation for lubrication is a good moly grease. Give them an occasional shot, use your oil change as a reminder. Assumes you do regular oil changes, please say you do.
There is a large installed population of PolyBronze. The product comes with good installation instructions, and email / phone support is available. Unfortunately the installation process itself is impossible to control for many reasons:
- condition of the mating parts
- other modifications to the vehicle
- dilligence in following instructions
- skill set of the installer
With a wide population of installed product, these variables ensure that some percentage of the installations will have problems. The challenge to myself and other manufacturers is to make products forgiving of errors and easy to install.
I'm not saying that Bernie (einreb) screwed up the installation, but his situation was not typical. He did send the parts in the pic back to me for inspection. Unfortunately the races where damaged upon removal, impeding meaningful diagnosis. Based on what I did see, the product design was adjusted to slightly increase clearance between bearing/race. His replacement parts had the greater clearance and he has had no problems.
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Chuck Moreland - elephantracing.com - vonnen.com
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