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964 / 993 Control Arm Bushings

 
Old 01-07-2008, 03:19 PM
  #46  
Jeff96-993
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I'm in. E-mail sent.

Thanks Chris!
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Old 01-07-2008, 03:23 PM
  #47  
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Originally Posted by 95FL993CAB View Post
What is there to gain and how do you tell if you need it?
What is there to gain? ~$900 in your pocket.

There are some recent threads going into lots of detail on symptoms, but if you get that "warped rotor" feeling but your brakes are fine, that's one possible sign.
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Old 01-07-2008, 03:52 PM
  #48  
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Originally Posted by Jack of Hearts View Post
Wow this is a huge development. Nice going Chris. Three questions:

1. Do you need a press to get the old ones out?

2. Should I expect slightly increased harshness from the front suspension?

3. What is the expected service life of the urethanes?
Same questions here too. Have a slight wobble but suspect brakes which I will be doing here in the next week or so but very interested to hear more about this.
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Old 01-07-2008, 04:23 PM
  #49  
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Not sure if Chris is on-line this week as he is in the UK.
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Old 01-07-2008, 04:31 PM
  #50  
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In Chris' absence, here are two of his videos on Youtube showing the before (rubber) and after (poly). He pointed out the wheel "chatter" in the first video.

Before: http://www.youtube.com/watch?v=sJton_tGO6w
After: http://www.youtube.com/watch?v=L1l8tBEEu1w
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Old 01-07-2008, 04:41 PM
  #51  
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Chris- did you pass around some prototypes at Callas last month?

If so, I didn't know it was you. Either way, well done, and I will be doing business with you!
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Old 01-08-2008, 12:18 AM
  #52  
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Originally Posted by Jack of Hearts View Post
Wow this is a huge development. Nice going Chris. Three questions:

1. Do you need a press to get the old ones out?
I use a press with a series of press tools I machined-up at work, but its not necessary. The DIY I wrote uses typical hand tools found in typical home garages.

Since the DIY file is too large to post here, anyone who wishes to see it please email me at [email protected] and I will send it over. Those who purchased the bushing kit, I will be emailing the DIY shortly

Originally Posted by Jack of Hearts View Post
2. Should I expect slightly increased harshness from the front suspension?
In the few cars I have installed urethane bushings, no real difference other than a slightly more direct feel

Originally Posted by Jack of Hearts View Post
3. What is the expected service life of the urethanes?
The folks who mold these bushings for me use the 95 durometer urethane for all of their suspension bushings and have been doing so since the early 80's without any real trend of wear, so they assure me.
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Old 01-08-2008, 12:23 AM
  #53  
chris walrod
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Originally Posted by dcdude68 View Post
Chris- did you pass around some prototypes at Callas last month?
Yessir, that was me
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Old 01-08-2008, 12:25 AM
  #54  
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Originally Posted by pjconner View Post
Not sure if Chris is on-line this week as he is in the UK.
I leave this Wednesday and will return the following Tuesday. I should have email access throughout the Motorsports convention.
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Old 01-08-2008, 12:34 AM
  #55  
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Originally Posted by 95FL993CAB View Post
....how do you tell if you need it? I have 90K on my 95 cab.
Good question.

With a large prybar or the like, pry between the control arm and the subframe mount. I have painted a red mark to illustrate the location in which to pry.
Name:  IMG_9719-1.jpg
Views: 278
Size:  73.4 KB

While prying, have a look at the forward bushing front side for cracks like this one:
Name:  crackedbushing-1.jpg
Views: 220
Size:  54.6 KB
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Old 01-08-2008, 12:37 AM
  #56  
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Originally Posted by gonzilla View Post
Did TC find that you had worn bushings at the tech session last month???
Yes, his car was due. Poor Long_Beach_968's car got beat up upon a little. The good news is, his car just needs a little attention and otherwise a solid example!
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Old 01-08-2008, 03:36 PM
  #57  
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Thanks for your answers Chris. I will check my front control arms this weekend. Something's a little loose up there--although it could be the tire rod inners.

I would expect that the urethane would transfer more road harshness to the frame, although not as much as say, Delrin, which I used on several cars when I was racing SCCA Nationals.

That said, it's hard to pass up a repair that saves hundreds and, oh by the way, makes the car a little racier.
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Old 01-08-2008, 03:47 PM
  #58  
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Chris Im in. Just sent you a PM.
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Old 01-08-2008, 04:00 PM
  #59  
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Chris I can host you some space on my FTP site. Gimme a shout and we'll take care of it.
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Old 01-08-2008, 04:38 PM
  #60  
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Originally Posted by ScottMellor View Post
Chris I can host you some space on my FTP site. Gimme a shout and we'll take care of it.
Are you sure Scott? The file is 6 terra bytes I'll send an email with the file attachment.

Thanks!
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