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Suspension Trick

Old 09-24-2008, 10:31 AM
  #31  
Wormhole
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Anyone have a source for 60mm ID needle bearings. I'm having a hard time finding something that will fit my shocks. The closest I came across is 2.5".
Old 09-24-2008, 11:41 AM
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Thrust bearings are not doing the same as the Hyperco perches. A thrust bearing only allows for spinning, not bending loads.

From the Hyperco site:
By precise shaping of the sealing wall of both the perch and cylinder body, the perch can freely tilt as needed to evenly distribute the load of the spring.
Notice it says tilt - something a thrust bearing does not do. The tilting is the most important thing here. Take a spring (little) and put it on your desk, then compress it with one finger. Notice it doesn't spin, but rather squirmes around.
Old 09-24-2008, 11:44 AM
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Bryan Watts
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Originally Posted by SundayDriver
When you compress a coil spring and the ends are constrained, the torque through the coils creates a bending force on the spring. I was told that up to 30% of the total damping has come from the friction at the shock seal when not controlled. Hyperco perches do the same at a much higher price.
On a front Ohlins strut setup with lots of side load, we run both needle bearings and the Hyperco hydraulic perches. Actually, I think we have them on the back coilovers as well.
Old 09-24-2008, 11:45 AM
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Bryan Watts
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Originally Posted by Premier Motorsp
I installed these on a car after taking Claude's class. No noticable difference.

Not saying it does not help, but I could not quantify it.
You can see it on a spring tester in more consistent spring rate throughout the travel range of the spring.
Old 09-24-2008, 11:48 AM
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Bryan Watts
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Originally Posted by Matt Romanowski
Take a spring (little) and put it on your desk, then compress it with one finger. Notice it doesn't spin, but rather squirmes around.
It spins as well...at least as it has been explained to me by people far smarter than myself.
Old 09-24-2008, 11:50 AM
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Bryan Watts
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Originally Posted by Wormhole
Anyone have a source for 60mm ID needle bearings. I'm having a hard time finding something that will fit my shocks. The closest I came across is 2.5".
Call these guys:

http://www.resuspension.com/
Old 09-24-2008, 01:48 PM
  #37  
JoeMag
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...just read through this thread and I saw a few using these without the hardended top/bottom races. I would think the loads on the little rollers combined with the slight movement they'd have will wear grooves into the aluminum.
Old 09-24-2008, 04:14 PM
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Bryan Watts
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Originally Posted by chris walrod
More than once, we would dump the airjacks and send the car only to have him return with strange feelings and low and behold, we would sometimes find one of these races jammed where it shouldnt be. This was since we never preloaded springs.
Is this on a sedan or a "real" race car with inboard suspension? On a sedan, it's as simple as using a helper spring to keep tension in the system at droop.
Old 09-24-2008, 05:03 PM
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Wormhole
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Call these guys:

http://www.resuspension.com/
Nope, they only have 2.5".
Old 09-24-2008, 08:35 PM
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95m3racer
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http://www.resuspension.com/KIT-C-O-...D-p-15410.html

I used them on a set of ST44's I just did for a 355 Challenge:

Old 09-26-2008, 05:36 PM
  #41  
Bill L Seifert
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It surprises me that I had never known about this problem until yesterday when I read Sunday Drivers thread. Then today, I get my latest copy of Grassroots Motorsports, and they have a product review of a company, sealsit.com, that sells them.

I can't use them because my car runs in SSC. But, I could probably run them and not get caught, because, if I make it into the top 5 at the Runnoffs, you can be sure that a meteor has hit Topeka on Oct. 11, or maybe even a hurricane.

Bill Seifert

1999 Honda Civic SI Race Car
Old 09-28-2008, 03:47 PM
  #42  
Bryan Watts
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Just noticed that this is a pretty old thread...oops.


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