I’m opening the door on poly versus rubber… this is an invite for all opinions
02-15-2006, 06:35 PM
#43
Melting Slicks
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"my motor; 500hp/500tq... rubber mounts, broken.. poly mounts, not broken. nuff said.."
Yep, except when my rubber mount broke, I replaced it with poly and left the other rubber mount in place. Pretty hard to break the rubber one on the compression side.
Yep, except when my rubber mount broke, I replaced it with poly and left the other rubber mount in place. Pretty hard to break the rubber one on the compression side.
Last edited by shafrs3; 02-15-2006 at 06:37 PM.
02-15-2006, 09:22 PM
#44
Team Owner
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St. Jude Donor '07
Originally Posted by shafrs3
"my motor; 500hp/500tq... rubber mounts, broken.. poly mounts, not broken. nuff said.."
Yep, except when my rubber mount broke, I replaced it with poly and left the other rubber mount in place. Pretty hard to break the rubber one on the compression side.
Yep, except when my rubber mount broke, I replaced it with poly and left the other rubber mount in place. Pretty hard to break the rubber one on the compression side.
02-15-2006, 10:21 PM
#45
Safety Car
Originally Posted by shafrs3
"my motor; 500hp/500tq... rubber mounts, broken.. poly mounts, not broken. nuff said.."
Yep, except when my rubber mount broke, I replaced it with poly and left the other rubber mount in place. Pretty hard to break the rubber one on the compression side.
Yep, except when my rubber mount broke, I replaced it with poly and left the other rubber mount in place. Pretty hard to break the rubber one on the compression side.
02-16-2006, 08:21 AM
#46
Le Mans Master
Originally Posted by C3 4ME
replacing worn out rubber with new rubber will make a huge difference and that poly wasn't worth the extra hassle. .
Mine has a Poly rear end now....front comming soon.
Eddie
02-16-2006, 10:50 AM
#47
Safety Car
What about...
I used poly (Energy Suspension) on the front end of the '69 and it's great, keeping in mind that I already had the F-41 setup.
All this poly talk has me asking a question. What about different densities of polyurethane? When I started doing the rear suspension on my Corvair (that thing has a TON of bushings!), the vendor had 3(!) different types of poly bushings, from almost stock to pretty near solid. Mentioned a durometer number... That would have a definite effect on a Vette's ride, eh?
Hans
All this poly talk has me asking a question. What about different densities of polyurethane? When I started doing the rear suspension on my Corvair (that thing has a TON of bushings!), the vendor had 3(!) different types of poly bushings, from almost stock to pretty near solid. Mentioned a durometer number... That would have a definite effect on a Vette's ride, eh?
Hans
02-16-2006, 11:12 AM
#48
Race Director
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Reading the links to Greenwood, Adams, and others, hard to argue with those guys who are in the know.
Have to tip my hat to the marketing guy for the poly bushings...make it enticing, the masses will buy...
Have to tip my hat to the marketing guy for the poly bushings...make it enticing, the masses will buy...
Last edited by GDaina; 02-16-2006 at 11:16 AM.
02-16-2006, 11:19 AM
#49
Safety Car
Originally Posted by Edzred72
Quite the opposite...rubber install is the extra hassle. Poly is MUCH easier.
Mine has a Poly rear end now....front comming soon.
Eddie
Mine has a Poly rear end now....front comming soon.
Eddie
But, for the front I went with rubber. It couldn't have been any easier to install. Simply tap the new bushings in and tighten the bolts once there is weight on the front end.
02-16-2006, 05:32 PM
#51
Burning Brakes
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Poly is definitely going to provide a harsher ride; I've got them on my Saturn.
However, my Saturn now feels more aggressive when I've pushed it at the autocross tracks.
Poly, I'd have to say, will definitely make the handling more aggressive than the rubber; it's also going to transfer a lot more of the ride into the frame, into the seat, and into any of the components attached to the polyurethane. This means that the possibility of breaking components goes up and the "comfort" quality goes down.
For a DD, I'd probably recommend rubber, just because of comfort. But if you're planning on doing any autocross/track racing with it, or you want a tighter handling car and to heck with the comfort, go for the polyurethane. I've already started a replacement of the rubber with polyurethane; the motor mounts I'm in the process of installing are the Energy Suspension ones, and the transmission mount has been replaced with a poly mount as well.
Once tax returns have come back for myself and my father, we're contacting Pattie at VB&P to get their full suspension package and replace the current junk under the car; included in that package will be poly bushings, which will be an improvement considering we're looking to autocross it once everything's dialed in.
However, my Saturn now feels more aggressive when I've pushed it at the autocross tracks.
Poly, I'd have to say, will definitely make the handling more aggressive than the rubber; it's also going to transfer a lot more of the ride into the frame, into the seat, and into any of the components attached to the polyurethane. This means that the possibility of breaking components goes up and the "comfort" quality goes down.
For a DD, I'd probably recommend rubber, just because of comfort. But if you're planning on doing any autocross/track racing with it, or you want a tighter handling car and to heck with the comfort, go for the polyurethane. I've already started a replacement of the rubber with polyurethane; the motor mounts I'm in the process of installing are the Energy Suspension ones, and the transmission mount has been replaced with a poly mount as well.
Once tax returns have come back for myself and my father, we're contacting Pattie at VB&P to get their full suspension package and replace the current junk under the car; included in that package will be poly bushings, which will be an improvement considering we're looking to autocross it once everything's dialed in.
02-18-2006, 03:06 PM
#53
Le Mans Master
Everything under my front is poly. I've heard they're stiffer, but a C3 rides rough anyway, so I never felt anything different. So, to me they just last longer. Larry
02-18-2006, 05:07 PM
#54
Le Mans Master
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St. Jude Donor '07
I have solid motor mounts and tranny mount and all my other bushings are poly. Its so loud that I can't even feel vibration or here it squeck. Wtf I can't spell squeak
If I replace my body mounts im going to solid.
If I replace my body mounts im going to solid.
02-18-2006, 05:12 PM
#55
Drifting
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St. Jude Donor '05-'07
Originally Posted by chris73cpe
Anyone have any opinions on poly vs rubber for body mounts? For some reason the poly ones are cheaper than rubber unlike the majority of suspension bushings
So I guess I don't know which is "better". I am using polyurethane for rotating joints (trailing arm pivots, A-arms, etc.) and rubber for strictly compressive loads (body mounts, etc.). Recently I have been looking at using rubber body mounts (on my solid mount 68) from another car that are thinner than the 73-up Vette mounts. That way I get rubber mounts without raising the body.