Thread: bushings versus heim

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I have a question.

I'm researching suspension options for a 32 ford and I have noticed that almost all kits (4-bar, ladder bar, hairpin, etc) use urethane bushings at all points (exception being clevises on some). Is everyone using bushings for a reason other than they are cheaper than heim joints? I would assume this is true except that I have seen most "money is no object cars" in magazines using bushings.

I have also read that urethane really is not that good of a bushing material because it binds during nonlinear movement and also needs constant lubrication.

Basically, whats wrong with using quality heim joints everywhere?

Heim joints tend to transfer more noise and vibration, are more sensitive to dirt contamination leading to rapid wear, and in the opinion of some, are more prone to breakage in street use (lot's o' debate on that one). Some point to their use by racers as "proof" of strength, but racers are in a different environ than street drivers. They pull maintainence far more often and aren't as concerned about "long term" durability. Similar to the case against using steering u-joints designed for racing as opposed to those for street use.

Graphite impregnated bushings don't require frequent lubrication and generally have a long life.

I would agree with Bob, bushings are the way to go on a street driver. The information I've found for what it's worth ........ Heim joints are for high horsepower. Bushings are prone to failing under the load of high horsepower. By high horsepower I'm talking beyond what's considered streetable. If I were building a vehicle for cruising and driving extended distances, it would have bushings.