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Rear suspension for racing?

Posted: 09 Apr 2017 10:16
by Markus
I'm wondering if the collective wisdom on here can guide me.
My 7-V8 race car has the original rear suspension geometry but with rod end links instead of the original bushed pressings.
While this is giving me much more tracking accuracy it is binding on sharp and cambered corners.
Should I go with parallel 4 links or a 3 link system?
If I go 3 link is there a better way to connect the upper, third link to the rear axle and to the body?
Cheers!
Mark

Re: Rear suspension for racing?

Posted: 09 Apr 2017 12:22
by Beans

Re: Rear suspension for racing?

Posted: 09 Apr 2017 15:12
by tr8
A BL drawing showing how the race car suspension was set up, look at some of the pictures in the album showing the set up on a race car that I restored.

http://s173.photobucket.com/user/ACN108 ... ort=2&o=27

http://s173.photobucket.com/user/ACN108 ... t=2&page=1

Paul

Re: Rear suspension for racing?

Posted: 10 Apr 2017 06:59
by Markus
Thank-you gents.
Do you have drawings or photos of the body mounting points for the upper links?
Cheers!
Mark

Re: Rear suspension for racing?

Posted: 10 Apr 2017 13:42
by tr8
this thread has some good pics.

viewtopic.php?f=2&t=23646&p=240785#p240785

Paul

Re: Rear suspension for racing?

Posted: 10 Apr 2017 21:27
by Beans
Markus wrote: ... parallel 4 links or a 3 link system ...

B.t.w. what kind of setups are you referring to with these mentioned above?

Re: Rear suspension for racing?

Posted: 11 Apr 2017 08:15
by Markus
I'm tossing up either a 3 link setup with a central upper link OR a 4 link with top links parallel with the bottom links.
Of course, both will need lateral control from either a panhard bar or watts link.
Thanks!
Mark

Re: Rear suspension for racing?

Posted: 11 Apr 2017 18:56
by Beans
Not sure about the 3 link you mentioned, but sounds like it will leave the roll centre were it is with the original set up ... to high.
I guess that the Panhard rod or Watts linkage are far better in this respect.
The 5 link set up I have in mind will lower the roll centre of the back axle by a maximum of ±130 mm compared to the original 4 link system.