Main one i'm working on is getting the flex evened out front to rear. The tri-4 link rear end flexes like mad because the springs had to be inboarded from the chassis rails and the front axle refuses to move. I've got lockers front and rear so i'm not doing this for the traction, i want stability. The entire car simply follows the front axle, i.e. ramping it backwards leaves the car level and rear does the work, ramping it forwards or dropping into a creek with a front tyre makes it lean over so bad i nearly puke with fear
I've even tried flexing it forwards with the front compression side spring out and still no joy.So i've got two options as i see it. get the rear springs outboarded more to reduce the pivoting motion on the instant centre and provide more leverage on the front or fabricate a Currie Antirock style swaybar for the rear.
The way i see it i can't get option one to work. To have the coils under the chassis rails i would have to have them mounted on outriggers behind the axle housing to get enough vertical space. Alternatively, i thought about running coilovers outside the rails but the tyre would likely foul them on compression as it moved up and tilted inwards.
For option two i was thinking of finding a torsion bar from an IFS truck that suited the width of my chassis rails and making a sway bar.
Some questions and ideas i had about this
Rather than have splines cut into the arms i was thinking about getting the factory suspension arms and/or torsion bar chassis mounts and cutting out the splined ends to weld onto 15mm plate torsion arms. I could either martack them on or even cut a slot into the outer splines so i can clamp them down.
By using a factory torsion bar i could get different rate bars if i need grossly more or less torque. small adjustments could be done with multiple holes in the arms.
since factory torsion bars usually have slimmer waists and thicker spline sections i could mount it with pillow block made out of tube welded to plate, with two piece bushes turned out of HDPE with grease channels and a grease nipple.
So questions
What do people think of the idea overall
To see if this is going to work before doing all the fab, i was going to tie the axles with limiter straps (webbing) at ride height, before flexing it up to see if the limited rear end would force the front to work. Is this a reasonable way to replicate the effect of a rear sway bar?
If the torsion bar is longer than the chassis is wide, is there any reason i can't mount it above the chassis rail with the pillow blocks on top of the rails? it would make for longer axle tube links but would get it out of the way of the driveshaft easier.
If it's as wide as the rails i will have to mount it under i guess.
Any reason i can't have the links mounted to the trailing arms?
Any guidelines what size material to make the arms and heim-jointed axle links out of. As the links get longer how would i calculate the required material size to withstand the compressive stress on the compression side? and what size heim?
