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Jim Cowden · 7th February 2009, 07:11 PM

Eric

I went through the same issues with rose joint bind on my car when I first started working out the arm lengths.
I don't know what my measurements would be from the center line with out working it all out on the drawings.
The arm lengths STD from the inner mounts to center of ball joint is approx 280mm
Uppers are approx 185mm.
With rose joints or spherical bearings they bound in bump and droop due to the short arm length.
High spring rate would probably have sorted this in restricting travel but that is not the direction I wanted to go.
I ended up with arms 75mm longer than STD and have no bind, I probably did not need to go this long to fix the bind problem as I was also trying to reduce the dynamic roll center movement.
What I am getting to is if your arms are similar in length to my std lengths and you want suspension travel they will bind with r/joints.
There are high angularity joints they may give you what you need.
Good luck.

Jim

7th February 2009, 07:11 PM	#6 (permalink)
Jim Cowden Jim C Gold Supporter Join Date: Dec 2004 Location: SYDNEY, AUSTRAL GT40: RF 105 Posts: 1,182	Re: suspension geometry Eric I went through the same issues with rose joint bind on my car when I first started working out the arm lengths. I don't know what my measurements would be from the center line with out working it all out on the drawings. The arm lengths STD from the inner mounts to center of ball joint is approx 280mm Uppers are approx 185mm. With rose joints or spherical bearings they bound in bump and droop due to the short arm length. High spring rate would probably have sorted this in restricting travel but that is not the direction I wanted to go. I ended up with arms 75mm longer than STD and have no bind, I probably did not need to go this long to fix the bind problem as I was also trying to reduce the dynamic roll center movement. What I am getting to is if your arms are similar in length to my std lengths and you want suspension travel they will bind with r/joints. There are high angularity joints they may give you what you need. Good luck. Jim __________________ If you say its to hard you have already failed.