That vehicle was beat on a bit.
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1975 Plastic fantastic aka Corvette
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Originally posted by Bob Holmes View PostThat vehicle was beat on a bit.
but the frame isn't cracked, it hasn't been wrecked, and there's no rust in the frame...
next up is poly bushings and figure out why this thing is wandering (beside the nose-high springs)Last edited by SuperBuickGuy; July 8, 2012, 07:08 PM.Doing it all wrong since 1966
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Last edited by Beagle; July 9, 2012, 05:43 AM.Flying south, with a flock of bird dogs.
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Originally posted by Bob Holmes View PostI am told, by a guy that should know, that UHMW would make the best bushing material. I just can't find anyone that has bushings made out of it. Of course, I should just make my own.Doing it all wrong since 1966
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Originally posted by milner351 View PostDo you have a lathe to build your own bushings? That would be flippin sweet.
and I found this.... interesting stuff
from USPlastics.com
What is the difference between the Acetron GP and Delrin?
The Acetron GP is a copolymer acetal. This general purpose acetal is the only porosity free acetal product available. This allows it to provide the performance and machinability of acetal without the center core porosity.
The DuPont Delrin is a homopolymer acetal. It has slightly better mechanical properties then the Acetron GP acetal but may contain a low-density center, especially in larger cross sections.
So that means that Delrin is for Miatas?
Last edited by SuperBuickGuy; July 9, 2012, 10:09 AM.Doing it all wrong since 1966
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Originally posted by milner351 View PostSounds to me like I need to get you the dimensions of the spring eye bushings and some $ for material and shipping ;-)
One thing to keep in mind, the Corvette has no suspension parts that move in 2 planes, so using solid bushings isn't a problem - that could be a real problem for the Falcon because, beside vertical compliance, the spring has to twist too. Since you have such short springs, putting solid or relatively solid bushings may not be optimal.
Interstateplastics.com was cheaper by a bunch for UHMWLast edited by SuperBuickGuy; July 9, 2012, 10:54 AM.Doing it all wrong since 1966
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Originally posted by Bob Holmes View PostDelrin is a trade name.
It'll be interesting to see if you can machine the UHMW. My understanding is that it is a bit gummy.
I asked my dad about using UHMW for bushings, he thinks its a good idea - and he's been machining it for ages. The only issue he brought up is the 180 degree temperature limit - the underside of the car does get pretty warm, and many bushings are near exhaust.... it melts at 273. What he said is it gets gummy at 180 then eventually cracks.... but it takes years to get there (he uses it for a myriad of things, but in this case it was on a commercial dishwasher as a door guide - they cycle to 180*). Also, on one of the sites it said to be sure a keep your material at less then 73* to avoid problems with machining - I wonder if what you said is the problem they're implying?
Also, there are different types of UHMW, one is more brittle then the other - and you can get specialty mixes like oil impregnatedLast edited by SuperBuickGuy; July 9, 2012, 10:04 PM.Doing it all wrong since 1966
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