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Mikey914 |
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#1
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The rubber man ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Group: Members Posts: 12,739 Joined: 27-December 04 From: Hillsboro, OR Member No.: 3,348 Region Association: None ![]() ![]() |
We are in the process of doing the A arm bushings in rubber
We can easily do these up in a polyurethane at the same time, just have to do enough to pay for the materials and set up would be looking at 25 sets to do the Poly The GB would be for a set of 4 (enough for 1car) For $28 in rubber and $36 in poly To get the pricing right we need 40 takers in rubber and 25 in Poly We've been in testing on these for some time and had made a couple variations. This is what they look like. SO Who's in? Attached image(s) ![]() |
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Tdskip |
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Advanced Member ![]() ![]() ![]() ![]() Group: Members Posts: 3,702 Joined: 1-December 17 From: soCal Member No.: 21,666 Region Association: None ![]() ![]() |
Poly compound is CRITICAL. Interested for sure but how will we get the right balance of compliance and firmness?
Genuine question / don’t know how to do that and haven’t tried to make bushings before. |
Mikey914 |
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#3
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The rubber man ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Group: Members Posts: 12,739 Joined: 27-December 04 From: Hillsboro, OR Member No.: 3,348 Region Association: None ![]() ![]() |
Poly compound is CRITICAL. Interested for sure but how will we get the right balance of compliance and firmness? Genuine question / don’t know how to do that and haven’t tried to make bushings before. Fortunately I have (IMG:style_emoticons/default/biggrin.gif) |
JamesM |
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#4
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Advanced Member ![]() ![]() ![]() ![]() Group: Members Posts: 2,013 Joined: 6-April 06 From: Kearns, UT Member No.: 5,834 Region Association: Intermountain Region ![]() |
Poly compound is CRITICAL. Interested for sure but how will we get the right balance of compliance and firmness? Genuine question / don’t know how to do that and haven’t tried to make bushings before. Fortunately I have (IMG:style_emoticons/default/biggrin.gif) My issue with poly bushings isnt with the firmness, its that none of the bushing surfaces were designed to be friction surfaces. The rubber bushings are completely immobile and bound to the control arm/chassis. All control arm movement is the result of the bushing flexing. None of the surfaces on either side of the bushing remotely resemble anything close to flat and or smooth which results in unpredictable (and thus uncomfortable) bushing movement when replacing with poly. Not to mention potential binding/chassis damage BTDT. This is why all the good solid bushings (Rebel, Elephant, etc) sleeve everything and run the bushing on the machined sleeves. I was blown away at how much more comfortable the ride in my autox car became when I replaced my front poly bushings with the Rebel Racing solid bushings despite having gone from poly to a much harder setup. The smoothness of the control arm movement seemed to make a much larger difference in ride quality (and handling) than the firmness of the bushing material. Was talking with Eric about this exact thing the other day, but one idea I have been wanting to attempt is to run dual poly bushings instead of a single one. Basically take 2 bushing and machine the inside of one and the outside of the other so they fit together where the single bushing would normally install. This would basically move all friction surfaces to be between the machined poly bushings. My only concern at that point is if the material is strong enough at that thickness. This is something I have seen Powerflex do with a lot of their bushings (I even run some on one of my BMWs like this), they also use that to then tune the ride quality by offering varying harnesses for one of the 2 bushings. No idea how it would turn out, but if you are going to make some polys i think its worth a shot to try it given straight single poly bushing on a 914 are crap. I speak with first hand knowledge on this as binding poly bushings were responsible for breaking one of my front control arms and tearing a crack in my chassis. |
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Lo-Fi Version | Time is now: 17th December 2024 - 01:34 AM |
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