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A Frame Angles etc etc
Posted: Sun Apr 30, 2006 7:50 pm
by justinshere
Hey im in the process of putting a 3-Link(A Frame and lower control arms) into the rear of a lux.
I wanna keep the lower control arms as short as possible so the dont get hung up on rocks etc but i still want a bullsh*t amout of flex.
Can any one help me with a platfom to work from- preferable the angles and Lengths of the lower arms and A Frame.
Thought Please!!!
Thanks
Posted: Sun Apr 30, 2006 8:15 pm
by redzook
try to get ur lowers into the 35"- 40" range keep them flat and triangulate them
Re: A Frame Angles etc etc
Posted: Sun Apr 30, 2006 8:30 pm
by STUMPY
justinshere wrote:
I wanna keep the lower control arms as short as possible so the dont get hung up on rocks etc but i still want a bullsh*t amout of flex.
Thought Please!!!
Thanks
No don't make the arms short.
The shorter the arms the more diff walk you get.
Make your arms longer!!!!
Posted: Sun Apr 30, 2006 8:31 pm
by plowy
here is a good guide/write up on doing a 4 link and im also using this system for the 100 series diffs im putting in the 40 ,with a A frame
i also used its principles on my remote control rock crawlin buggy wich has worked a treat and sovled alot of dramas ive had with it
especially the part on were the lower control arms need to be tapperd inwards to stop torque steer at full flex
hope it helps
http://www.4wheeloffroad.com/techarticl ... index.html
http://www.4wheeloffroad.com/techarticl ... 0307_link/
A frame
Posted: Mon May 01, 2006 5:40 pm
by justinshere
Any one else got thoughts on this...
I included a few pics to show u what im lookin for at the end... sorry its a crap drawing... of course the fuel tank and exhaust are not there now.
Lengths would help alot.
Cheers
Posted: Mon May 01, 2006 7:48 pm
by redzook
triangulate ur lowers
A frame
Posted: Tue May 02, 2006 9:21 am
by justinshere
So i triangulate the lowers a bit.
anyone got help with the lengths of 'X' n 'Y' the idea i got from a 4 Link was make 'Y' 70% of 'X' thoughts????
Posted: Tue May 02, 2006 9:39 am
by lay80n
Triangulating your lowers in the opposite dirrection to the uppers will help to reduce the "rear steer" effect as the suspension articulates.
Layto....
Posted: Tue May 02, 2006 4:32 pm
by 4sum4
lay80n wrote:Triangulating your lowers in the opposite dirrection to the uppers will help to reduce the "rear steer" effect as the suspension articulates.
Layto....
And then were is your roll axis?
Re: A frame
Posted: Tue May 02, 2006 4:35 pm
by 4sum4
justinshere wrote:So i triangulate the lowers a bit.
anyone got help with the lengths of 'X' n 'Y' the idea i got from a 4 Link was make 'Y' 70% of 'X' thoughts????
uppers 75% shorter than lowers and vertical seperation about 1/4 the tyre width and make you links as long as you can don`t worry about ground clearance your rear will slide over
Posted: Wed May 03, 2006 6:17 am
by redzook
4sum4 wrote:lay80n wrote:Triangulating your lowers in the opposite dirrection to the uppers will help to reduce the "rear steer" effect as the suspension articulates.
Layto....
And then were is your roll axis?
wen looking from the top project the lower links forward till they hit
then project the uppers backwards till they hit
now u have these two points
look from side on and connect the 2 points this is your roll axis
you want your roll axis flat or a little lower at the front
wich is pretty much impossible with parrallel lower links