Polyurethane Strut Tower Bushings

[jkboyd]

Hi, I'm thinking of replacing my strut tower bushing with polyurethane. Are there any issues with running polyurethane, like binding etc.? Thanks!

[svono50]

That top mount is a pivot point for the front suspension, so increasing the stiffness would impact your suspension motion. Moving to poly material from the OEM 'onion head' rubber units would certainly be an increase, but I can't say how much impact that would really have as I moved from the onion head mounts to Maximum Motorsports adjustable mounts, which use a spherical bearing in them. The bearing mount allows smooth angular movement, but virtually zero vertical movement of the strut rod. Honestly I don't see that it would dramatically effect things using a poly bushing up there.

[jkboyd]

Thanks for the reply. I think most folks must go with CC plates because I didn't find much info on poly bushing. I found a threat on corral.net where someone brought up binding and possible strut shaft break and premature wear of the strut but I didn't understand how that's possible. I'll probably just wait and see if MM puts there CC plates on sale and go that route. How do you like the MM mounts?

[gbeaird]

Did they have actual shaft breakage, or they _thought_ there was that threat? While there is some movement there, unless you're running some drag racing suspension, where it goes full-range on launch, I'd doubt there's that much flex, certainly not on an SVO with good struts. Our car only has the factory onion-heads, though, since the car was run in F Stock by us.

And yes, I'd be interested in finding out how the MM parts worked out. Not sure they'd work with our STB, but there's always hope. :-)