4 link

[Big4x4ride]

I am trying to setup a 4 link rear and have been running numbers on my setup, what kind of roll center, and antisquat are you guys having on your setups??

[flourman]

Well from the infamous 4-link calculator, I'm running -106.65% anti-squat and a roll center of 18.46" but I don't think I entered the numbers right.......

I don't have any complaints from it and it is very predictable.

[DesertZuki]

What calculator?

[Zee]

http://www.pirate4x4.com/forum/showthread.php?t=204893&page=1&pp=25&highlight=triaged

[DesertZuki]

thank you!

[Big4x4ride]

Lookign for some input on my 4 link numbers. Pretty sure after abotu 2 hours of measuring and stuff I know what I can make work.

Anti squat 112%
Roll Center Height 21 in
Roll Axis Angle 11 degrees (Roll Oversteer)
Instant Center X-Axis 68 in
Instant Center Z-Axis 29 in

By making my upper link adjustable at the axle I can get to these numbers (1 inch lower)

Anti-Squat 94 %
Roll Center Height 19 in
Roll Axis Angle 11 degrees (Roll Oversteer)
Instant Center X-Axis 98 in
Instant Center Z-Axis 35 in

1 inch higher

Anti-Squat 123 %
Roll Center Height 23 in
Roll Axis Angle 11 degrees (Roll Oversteer)
Instant Center X-Axis 58 in
Instant Center Z-Axis 27 in



Any input is appreciated

[redzook]

if you can triangulate ur lowers a bit more to try to get the roll axis flat
will be better

and try to keep ur AS under 100

[Big4x4ride]

been doing lots and lots of measuring, figuring and running number on calculators. I have found a way(by calculator) to get anti squat at 101% with a 0 degree roll axis angle , roll center height of 22". After measuring again it looks like the layout i calculated will fit and work out on the frame. My only question is link length. does anyone see a problem with 48" long lowers, 39" uppers?? This is on a 96" wheelbase and having a 31" driveshaft .

[redzook]

the only problem I see is that there gunna hang up on everything

and unless they are super beefy will bend

i got my lowers down to 37"
and my roll axis is actually a little lower on the front ( better for road handleing)

although i run my lower links ontop of the rear housing so its easier to get the roll axis flatter

[flourman]

Well from the infamous 4-link calculator, I'm running -106.65% anti-squat and a roll center of 18.46" but I don't think I entered the numbers right.......

I don't have any complaints from it and it is very predictable.

Correction on mine, I was off an inch on my measurement.

Here are my #'s

AS = -43.03%
Roll Axis Slope= 0.21in
Roll Axis Center Height= 19.60in
Roll Axis Angle= 11.87 degrees