Reply to "Thoughts on a-arm bushings for racing"

The Weistec are $799.99 for 32. That comes out to $25 each.

These are done EXACTLY like the polyurethane. A stainless center "pipe" through a left and right bushing.

The poly would be molded and the Delrin would machined down out of bar stock.

The poly fit finger tight in the suspension arm. Makes them very easy to service.

Only the rubber bushings are pressed in but they are molded into a steel sleeve and they use a steel inner sleeve for the bolt to pass through.

I don't know if the Delrin is machined for an interference fit since I have never used them, just the stock and the polyurethane.

I haven't seen durameter numbers on the poly's but I agree, they are more than adequate and you won't need to seek out a dental technician to repair the fillings that got knocked out of your teeth.

The Delrin has virtually zero give to them. It is the same effect as metal to metal except there is no noise.

I would expect them to wear rapidly also.

It's really the grip of racing tires that would make you need high durameter numbers on these bushings.

Even that is a little controversial in that the grip of race tires of the era aren't as good as a current "aggressive" street tire so it depends on the engineer who is setting the criteria?