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Thinking About trying Prothane Bushing


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I bought a full set of new energy suspension poly bushings on Craigslist last year for ~$30 - couldn't pass it up.  I haven't installed them yet because I've been focused on the LS1 install.  I'm closer to starting on the suspension so now I'm wondering if I should run 100% poly or a mix between rubber (for anything that goes "up and down") and poly for other locations.

 

Do the poly bushings make the car ride harsh?  I don't mind firm and tight but teeth jarring harsh is what I'm trying to avoid.  I'm looking to make the 240 a daily driver when weather is good.

 

Not trying to hijack the thread just wanted to get a few quick thoughts on the subject from someone experienced.  Thanks...  

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100% poly here too, tightens up the car a lot and is not too harsh for me. The only rubber suspension bushings on my Z are the two rear TC rod bushings in order to give it enough compliance without too much deflection. People complain of squeaks but I liberally lubricated the bushings upon installation with the given grease and haven't had an issue. They've been installed for over 1.5 years and thousands of miles.

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You only mentioned the rear control arm bushings.  Unless yours are degraded, you might not notice a difference if you only swap the rears.  The factory rubber bushings, when in good shape, are actually pretty tight.  At least they were on my car, a 1976.  I didn't notice much when I swapped the inners.  I swapped my bushings a piece at a time to gauge effect.

 

Changing the bushings up front, especially the steering rack and TC rod bushings, will have bigger effects on handling.  Other bushings, like the mustache bar set, will effect noise and shifting feel. 

 

Lowering the car will have a really big effect on how the car handles.  It will feel much tighter and less top-heavy.

 

My general impressions.  The rear control arm bushings are the last that I would do if I was starting over.  Actually, the inners were the last I did and I never did the outers.  Swapping that thin piece of rubber for a thin piece of urethane doesn't seem worth it.

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