[V8Vairs] upper strut on LM rear suspension

[Bryan Blackwell]

Hi Mike,

You should to consider the roll center of the suspension - you might look at Fred Puhn's book on the subject:

http://autoxer.skiblack.com/books.html#fredpuhn1

Not just the distance between the mounts matters, also the location relative to the ground is important.  As it turns out, a suspension with a 'perfect' camber curve yields a less optimal roll center, so there's some compromise involved.  There's software out there to do the geometric modeling, but you can also do it with a set of scale drawings.  Good luck!

--Bryan

On May 26, 2011, at 11:36 AM, Michael Svinth wrote:

> I was having a hard time understanding this suspension stuff so I built a scale model of the rear last week so I could play with different modifications and measure the results.  What I found was that with a SLA(short/long arm)setup, I got modest neg camber gain on the bump but also got neg camber gain on the droop(not what I want).  When I raised the lower arm inside pivot point or lowered the upper arm inside pivot point, I got neg camber gain on the bump and positive camber gain on the droop.  I am using 14" arms.  The combination that I liked the best was 1" up on the lower and 1" down on the upper.  The result was about 2-3 degrees gain on both the bump and droop in 3" of travel.  
> I've not done this before so if I am missing something, I would appreciate someone pointing it out.