busted-knuckles

Ok so I have been messing with my 4 link calculator, and have come up with my set up. And what I'm wondering is for those of you guys who have built 4 links before or understand them completely. Do these numbers look good to you. I'm not completely sure what degrees of roll oversteer is.?
And I have 126% anti-squat in your personal opinion is that a good starting point? This Jeep is my DD but I wheel it hard when I do and it's mostly rock/forests wheeling.

Lead Foot

Did you fill out any of the fields in the top right? It says your tire diameter is 35 but rolling radius is 117? Your rolling radius should actually be somewhere around 16.5" to 17". 4850 seems really heavy for an XJ too. What is your estimated lift height? 40" COG also seems high. Measure to your top bell housing bolt. You also won't be able to get 0" of separation (your "y" value) on your upper link axle mounts unless you are running a wishbone setup? Fix these numbers and then see what your numbers look like.

Lead Foot

Roll over or under steer is also known as flex steer. As your axle articulates the high side gets pushed back and the low side gets pulled forward. Lower link triangulation helps this. 2 degrees isn't bad at all.

I like antisquat from 80-100%. Over 100% can induce wheel hop from the tires trying to "drive" themselves under the jeep.

busted-knuckles

Thank you! And yes that was a miss take on the 117.5 tire radius 1 extra 1. And ok thank you and as for the upper links yes I plan to run a wishbone style on the axle end. And I have 7" of lift correctly and I weighed my Jeep yesterday with it full of parts on a trip home and it was at 4980 with me in it. I have full armor...

busted-knuckles

So these are my corrected numbers. Opinions? Thanks again lead foot. Your opinions are very helpful!

Lead Foot

Man you must have that thing packed. Your Unsprung mass is your tires, rims, axles, and half your shocks, springs, and suspension links.

busted-knuckles

I was guessing on my usprung weight.
I have a trussed Dana 30 upfront, long arms 1/2 thick.

Rear is 8.25 disks,

I have steel soft 8's and mtr kevlar's





I also carry a spear tire out back.

busted-knuckles

What would u guess for my unsprung weight?

busted-knuckles

Well I'm starting the process of this build. I designed out the mounts. Have all the geometry done.

Lead Foot

Lookin good man. Can't wait to see you finish it.

busted-knuckles

If u wanna see steps as I get them done I'm posting up progress on my build thread... I changed my number since this thread as well.

busted-knuckles