I've rebuilt the entire suspension on my 66, including the 1" front S/B, 4.5 mid-eye leaf rear, 570lb front springs w/1" drop, no rear sway bar. A bump steer kit and roller perchs are definate next once I complete the body work and paint. The oversteer is driving me nuts, especially cornering at speed. Does the shelby drop make serious steering geometry improvements? Would it help with the oversteer/understeer? one aspect not discussed is the limited travel and binding of the upper ball joint.

 

As for "oversteer driving you nuts", do you mean the back tires slide-out too easy around corners?
Are you using newer radial tires or biasply?
If they're bias, they tend to oversteer and slide anyway tending to make an alignment problem worse. Newer radials are much more grippy and you can get away with more oversteer.
Either way it sounds like an alignment is what is needed.

 

Just when is it oversteering and what (if anything) are you doing with the throttle when it happens?

Just on rough roads or pretty much any road at all?

You wouldn't happen to have extended length shackles back there, would you?


Norm

 

When it oversteers what are you doing? Is it under braking starting to turn, going through a turn while coasting or feathering the gas or does it oversteer coming out of a turn when you get on the throttle? And how tight of a turn? What shocks are you running.

 

Oversteer? Your rear end is fishtailing out while the front is still tracking? Forgive for wondering why this is bad. If this is happening often enough to drive you crazy, maybe you need to slow down to legal speeds.

Frankly, I prefer that to understeer, if you were getting understeer, your first indication of a problem would be it would plow straight ahead, off the curve.

The 1" drop is a natural compliment to the setup you already have. You will notice the improvement immediately.

 

I did the shelby drop and quick steer to my fastback and its probably the best mod I've done to it in terms of handling. Its like a different car, feels so much more responsive and stable when I drive.

 

I think you need to give a detailed description of what you are calling oversteer.

 

Thanks guys. I'm running 225/60/15's, TA radials. My front end alignment was checked, and all is fine. I'm probably running a degree or two more - camber than I truly want but all is good. The perfect scenario....a roundy-round on-ramp to a freeway. I need to ease off the steering once or twice through the turn because the back end feels like it wants to come out on me. Slowing down is not an option just kiddin.

 

I'm wondering if i need to install my rear sway bar, or do a shelby drop, or both, to stop the oversteering effect. I've avoided the rear sway bar because I really like the ride I've got and don't want to stiffen it up any more.

 

Do the "drop" before you go any farther.