Ok, guys....I am completely new at this so please bear with my automotive ignorance.

1985 Z28 I plan on narrowing the rear end to allow for 15X33's. But, because of the location of the frame rails I understand it is not going to happen without some fab work. I am okay with that.

This is a weekend street car. So, I would like to know which set up is more corner and speed bump friendly....Ladder bar or 4 link. I know it sounds ridiculous. Why would anyone want to narrow a rear end, run beefy tires and want the car to stick corners? I want the look and performance that is right in between a Drag Racer and NASCAR Racer Profile.

With the rear end back halfed, rear end narrowed and 15X33 tire on it, I understand it will not handle like it would prior to mods. But, I would like to do as much as I can to get it to corner some what decently.

So, which is the better set up, and are anti sway bars an option, and dose anyone manufacture them for such a set up or is that a custom job.

Thanks guys

 

https://www.thirdgen.org/forums/fabr...f-project.html

 

okay, how about a 3 link. I heard thats what road course vehicles use.
Anyone know who manufactures these.

I really appreciate any help I can get hear because I am really in the dark here. I found out that 4 link and ladder are pretty much brothers and neither one is going to going to be street friendly.

 

a poly bushed 4 link wouldnt be that bad, alot of prostreet cars have them. and that tall side wall just isnt going road racing . without back halfing it a 28 10.5 will fit, and an equal size street tire can give good grip, spend money on two sets of wheels and skip the back half

 

There isn't a thing wrong with your Tqarm suspension. Its tried and true and doing very well in both fields. A decent setup can be put into the car that adjusts and works great in both realms, with simple shock adjustments given you purchase the approriate shocks and struts . You can have one wicked biathalon car. Save your money and time and just build the TQ arm suspension.

NASCAR uses a solid mount trailing arm setup that utilizes LONG trailing arms trangular mounted. You do not have room without butchering the car, and your tqarm setup is actually more adjustable and better handling when those adjustments are set properly. THe better thing the NASCAR rear suspension has over a tqarm setup is absolutely no wheelhop and can handle massive power, but at a lose of cornering geomerty benefits. It is high speed stable, and can be set good to one side, but work at best only so-so on a road course.

 

^ well, looks like dean has been banned again.....

First off, you will not be narrowing the factory rear-end, as it is most deffinitley not worth it. - We can break it with street tires, you don't even want to begin to turn that much rubber.

Anyhow, a ladder bar system is crap for the street. With only a single pivot point, both tires have to move at the same time, in the same direction, thus zero body roll is allowed. Deffinitley not good for the street.
An aftermarket 4-link system only works on the street IF you maintain parrallel links. If you lower the front of the upper link to help with traction on acceleration(the benefit of these systems) then body roll during cornering or when a single tire travels over a bump, the rear will steer the car as the arms lengthen/shorten through their range of motion. This is known as roll over steer and is very bad. Extreme situations make the car undriveable, minor situations still create less control.

If you're stuck on the big tires(which won't handle for crap w that much side wall) Then I would reccomend a factory type tq arm system, or 3-link. Either system would have to be custom fabricated, but with those tires you're going to need A LOT of custom work anyhow.

All things aside, you either better have very good knowledge and skills of your own, or a very thick pocket book to afford an expert's services.