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Old 09-26-2017, 11:20 PM   #1
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Default Spherical Bearings

Has anybody done this on a Miata? I replaced poly with spherical on 1 car, and it made a Huge improvement. The car was so much smoother and easier to drive.

If you've done this, can you point me to a supplier of parts or kits?
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Old 09-29-2017, 08:14 PM   #2
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I agree that the lack of binding in spherical bearings is awesome. I believe the delrin/bronze lined poly combo found as "the full package" at this link may be better for street usage. Not enough binding to matter, and much more practical for the street.

http://sadfab.com/bushingpackages.html

Lots of info in this thread, with the most relevant info in the first post.

https://www.miataturbo.net/suspensio...cussion-87573/
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Old 10-02-2017, 08:30 PM   #3
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Originally Posted by grubinski View Post
I agree that the lack of binding in spherical bearings is awesome. I believe the delrin/bronze lined poly combo found as "the full package" at this link may be better for street usage. Not enough binding to matter, and much more practical for the street.

http://sadfab.com/bushingpackages.html

Lots of info in this thread, with the most relevant info in the first post.

https://www.miataturbo.net/suspensio...cussion-87573/
Yeah, I read through that. It was interesting.

I would avoid Poly on a street car. They require a lot of maintenance. Without a lot of maintenance, they bind up and wear out a lot more than you would think.

Delrin is not a bad option. I think it's better than both rubber and poly.

I have these nice billit arms from V8R that I'm thinking of using. I picked them up cheap a couple of years ago. They are sturdy, and have good rod ends instead of bushings. But they are heavy, and will add to the unsprung weight.


for the upper arms, I could buy these, chop off the ends, and then modify them to accept rod ends.


Not sure what to do about the rear. I don't have a machine shop in my garage. So fabbing up the spacers and sleeves for bearings is not something I could do.
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Old 10-02-2017, 08:39 PM   #4
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What about this? Anyone have experience with this? INTEGRAL-SUSP-BUSHING-SET - Integral Kobe suspension bushings - MiataRoadster - High-performance service...and parts for Mazda Miata Roadsters

Actually, I think Miata Roadster may have all the answers. I don't know why a Google search didn't turn them up before. But they have some pretty good options. They offer complete tubular arm replacements complete with rod ends and uni-ball bearings already installed. Also pillow blocks or press in spherical bearing housings for stock arms.

Next month when things calm down a little around here, I'll give them a call and see what they actually have available, and then order up my suspension upgrade. I'll let you know how it turns out. Gotta get ready for next season.

Last edited by .boB; 10-02-2017 at 09:08 PM.
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Old 10-03-2017, 08:42 AM   #5
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I'm not advocating straight poly, I'm talking about SadFab's poly bushings with a bronze liner. See the video here ...

http://​​​​​​​https://www.youtube.co...?v=6vts22JfoD0

He installs poly on one side, and the SadFab stuff on the other. Even within a short period of cycling the suspension arms up and down, the poly is very bound up. The delrin and bronze-poly combo that SadFab sells is still moving freely.

​​​​​​​I was going to go spherical on my car, but I think I'll use these instead.
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Old 10-04-2017, 01:09 AM   #6
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Cool fixed link

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