Mike8675309
Registered User
I started this thread to keep the tech talk out of the non-tech area, this started with:
Read through the thread on the cobra stuff, and take a look at the bump steer video on the manufacturers main website.
I believe our toe link compensator works within our rear suspension to control bump steer. If you change the compliance of the bushings within the control arms, you will change the bump steer characteristics of the rear suspension. The toe link works in conjunction with the factory bushing compliance to determine full suspension travel bump steer path. For the Cobra kit linked, their bump steer is controlled with a fixed tie rod, that the kit replaces with an adjustable tie rod.
I'm not sure what we would need to do with our car to get some adjustment into the bump steer if you do replace all the bushings. I think it would be valuable to take a look at a stock car, with low miles or older car with new rubber bushings. Check the bump steer. Then check a stock car with high miles and see how worn bushings affect this. Then check a car that just did poly bushings all the way around.
It would be interesting to see how important having fresh bushings are. Then look at what might be done to bring the other cars into better bump steer curve.
The toe link compensator in our IRS and how it works with the control arm bushings plays a significant roll in the stock suspension behavior. Changing the bushings in the control arms or the toe link without careful consideration could turn a forgiving suspension design into something less forgiving.
I've followed some Cobra guys and their use of Delrin bushings in their subframes. They seem to feel they improve handling. Not sure if poly would be similar
Here is the kit and thread where they discuss them:
http://www.svtperformance.com/forum...g-kit-w-adj-sway-bar-links-bumpsteer-kit.html
The manufacturers website with interesting info on bump steer, and sway bar adjustments
http://www.fulltiltboogieracing.com/
I'd love to see the availability of some of this for the MN12 subframe.
subframe wise Id do delrin. Its the control arms Im concerned with. From my unerstanding the delrin cobra bushing can work.
Read through the thread on the cobra stuff, and take a look at the bump steer video on the manufacturers main website.
I believe our toe link compensator works within our rear suspension to control bump steer. If you change the compliance of the bushings within the control arms, you will change the bump steer characteristics of the rear suspension. The toe link works in conjunction with the factory bushing compliance to determine full suspension travel bump steer path. For the Cobra kit linked, their bump steer is controlled with a fixed tie rod, that the kit replaces with an adjustable tie rod.
I'm not sure what we would need to do with our car to get some adjustment into the bump steer if you do replace all the bushings. I think it would be valuable to take a look at a stock car, with low miles or older car with new rubber bushings. Check the bump steer. Then check a stock car with high miles and see how worn bushings affect this. Then check a car that just did poly bushings all the way around.
It would be interesting to see how important having fresh bushings are. Then look at what might be done to bring the other cars into better bump steer curve.
The toe link compensator in our IRS and how it works with the control arm bushings plays a significant roll in the stock suspension behavior. Changing the bushings in the control arms or the toe link without careful consideration could turn a forgiving suspension design into something less forgiving.