Alan Cesar
Alan Cesar Associate Editor
3/7/12 9:19 a.m.

Last year's story on the Condor Speed Shop mentioned that they had a friend make new motor mounts and suspension bushings from Delrin. They now sell those parts on eBay. It's a neat material, and thanks to the glorious intart00bz, people who make little oddball parts have a market. We got a connector for the Porsche that way.

http://grassrootsmotorsports.com/project-cars/1984-porsche-911-carrera/cottage-industry-support-our-porsche/

scardeal
scardeal Dork
3/7/12 9:35 a.m.

Okay, so I've been meaning to ask, because it is relevant to my SP desires and such:

What the heck is delrin, and where can I find bushings, etc. made of it? Is it really tough and non-giving like I hear? That is, does it really give 99.9% of the performance of solid metal mounts?

92CelicaHalfTrac
92CelicaHalfTrac SuperDork
3/7/12 9:40 a.m.

There's not many cars that have delrin parts available for them off the shelf, ESPECIALLY in the area of suspension bushings.

You'll have to have them made. Usually on a lathe. The material itself isn't ridiculously expensive, luckily.

Yes, it's really tough and doesn't have any real give to it. 99.9% of solid steel mounts might be pushing it, but it's an easy 90-95% for sure. WAYYYYY harder than poly.

ditchdigger
ditchdigger Dork
3/7/12 10:40 a.m.

Delrin is an acetal resin trademarked by DuPont. It is used for suspension bushings because it machines beautifully. It isn't designed to be a bushing material and it wears pretty quickly. My experience is with control arm bushings on an A1 VW. I got about 4 months of driving on them and they were ridiculously shot. Delrin is hard so it is a rough ride.

UHMW Polyethylene is supposed to be a far superior material for suspension bushings and as a bonus it is less than 1/10 of the price. It however machines like crap.

This thread

http://corner-carvers.com/forums/showthread.php?t=8786&highlight=delrin

has the typical battling egos of a corner carvers thread but there is VERY good tech in there.

92CelicaHalfTrac
92CelicaHalfTrac SuperDork
3/7/12 10:52 a.m.

FWIW, there's a DSP MX6 that's been running Delrin bushings for at least 2 years, he hasn't mentioned any real degradation.

I'll agree that UHMW is better. Got a buddy out here that used to make shifter bushings out of that stuff, i have a set. He hated doing it though, for the reason you said. Machines like crap.

scardeal
scardeal Dork
3/7/12 1:27 p.m.

Hrm... looks like this place will manufacture bushings to spec... http://www.plasticbushingdesign.com/

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