Polyurethene suspension bushes?

Answer 1

As has been mentioned, there are some handling benefits to changing your suspension to harder bushings such as Polyurethane.

However, please keep the following in mind:

a) Road/Tire noise will increase *DRAMATICALLY*
b) Ride comfort will go down (you'll feel more shock and vibration)
c) Suspension engineers use the deformation of suspension bushings to control the geometry of the suspension under load. This is known as "Kinematics and Compliances" (K&C). For example, the lateral force compliance on a rear corner of the vehicle is tuned to make the tire "toe in" during lateral force (from outside to inside). This creates more understeer, which is a safer condition for most drivers. If the tire went "toe out" during lateral force, you would get oversteer created only by the geometry change. (in this case, rear-steer)
If you change the bushings, you *will* alter the K&C of your vehicle. This might be an okay thing (especially if you are a capable driver), but just be aware of it.
d) The rubber bushings absorb a certain amount of force while going over bumps and rough roads. This is energy that is saved from going into your suspension components. If you replace your bushings with Polyurethane, your other components *will* wear out faster, since they now have to absorb that extra force. Keep it in mind.

In your final analysis, remember this: no matter what brand you drive, your car's suspension was designed by a multi-billion dollar company. They do the best they can to balance all of the performance of that vehicle (ride, handling, noise, vibration, durability, cost, etc) There are very, very few vehicles out there that use "solid" bushings from the factory, and those that do (Porsche GT2/GT3 for example) are purpose-built race cars that are designed with compromises in mind.

There is a reason that 99.9% of the cars on the road don't use Polyurethane bushings.

If they were that great and had no compromises, don't you think all manufacturers would install them?

Answer 2

The replacement or, upgrade to polyurethane bushings is DEFINITELY a plus on any vehicle but, almost a necessity on a high performance car. The poly bushings provide a firmer ride with less "roll" in curves.

Answer 3

Very good for improving the handling of the vehicle, they are stiffer and will give less body roll and if used in conjunction with lowering the suspension (with the proper kit) this will make your car go round corners like a train on a teack ! but remember if your going to increas perfomance in one area you need to hink about other things to like brakes etc

Answer 4

Very good if you want to improve the handling of your car. Terrible if you want a comfortable ride like your original rubber bushings provide. Please keep in mind that polyurethane bushings are just as susceptible to damage from transmission and power steering leaks as rubber bushings.

Answer 5

bushes? Do you mean bushings ? If so, these are a very good product to use, and/or replace yours. They come in colors too.

Answer 6

yea, built by isambard kingdom brunel, completed in 1864