Solid rear subframe bushings

[SnakeSkinner]

Originally Posted by wraith

your saying on your car, you can take that rubber puck and spin it around without it being squashed between the car and subframe? What I am saying is that NVH as transmitted into the floor thru attached connections can be quelled by the simple contact of two materials. You know, like spraying rubber on a metal panel. The whole metal bushing comes to a small nub which is in direct contact with the upper frame mounting point, but its surrounded by a thick rubber washer which has inherent frequency damping properties. Its like a continuous copper pipe which vibrates when water throttles thru it. If you wrap the pipe, its not the thickness of the material wrap that blocks sound, its the ability of a material in contact with another to alter the natural frequency in it that normally lets it produce a standing wave. Its physics, but I am just a EE, and its been over a decade since I wa a Freshman.

Yes you can re-install that, thats why we made it that size at the top.

[cbehnken]

Originally Posted by wraith

your saying on your car, you can take that rubber puck and spin it around without it being squashed between the car and subframe? What I am saying is that NVH as transmitted into the floor thru attached connections can be quelled by the simple contact of two materials. You know, like spraying rubber on a metal panel. The whole metal bushing comes to a small nub which is in direct contact with the upper frame mounting point, but its surrounded by a thick rubber washer which has inherent frequency damping properties. Its like a continuous copper pipe which vibrates when water throttles thru it. If you wrap the pipe, its not the thickness of the material wrap that blocks sound, its the ability of a material in contact with another to alter the natural frequency in it that normally lets it produce a standing wave. Its physics, but I am just a EE, and its been over a decade since I wa a Freshman.

No, you can't spin the rubber washer, but I doubt it has any of the dampening functions that you hope.

I don't think the alumninum subframe bushings are going to add much vibration if you keep the stock diff mounts, shock mounts, and trailing arm mounts. There is a lot of rubber with them and I think they will dampen a lot of vibration.

I think these mounts will really stiffer up the rear chassis, but the max benefit would to be also to add poly bushings at all the stock points.