Polyurethane or rubber for bodymounts?
Thread Starter
Racer
Joined: Jul 1999
Posts: 300
Likes: 0
From: Merritt Island Florida
Polyurethane or rubber for bodymounts?
hi all. I heard some of the pros and cons but still am not sure. The poly kit is so much cheaper but i hate the noise factor. Has anyone used poly mounts for the body? Thanks Tom
Drifting
Joined: Aug 2001
Posts: 1,708
Likes: 0
From: North Carolina
Re: Polyurethane or rubber for bodymounts? (tom75)
I heard you could get rid of the sqeaking with poly if you greased them up bunches, and kept them greased up...but gees to me that'd get annoying having to grease everything every other month...just to get it to stop sqeaking. I may go rubber when I redo my bushings, just because I don't want to have to deal with sqeaks, and I hear poly is tougher, and rides harder...thats the last thing these cars need. Just my opinion though.
Daniel
Daniel
Pro
Joined: Aug 2001
Posts: 605
Likes: 0
From: hamilton square NJ
Re: Polyurethane or rubber for bodymounts? (daniel77350)
It's the sound of a performance suspension my friend. I wouldn't worry about the squeeks too much. They only happen when you don't grease them up.
Race Director
Joined: Feb 1999
Posts: 16,978
Likes: 7
From: In Dreams There Is Truth Ohio
Re: Polyurethane or rubber for bodymounts? (tom75)
You must crave the bone jarring ride, my friend. The 68-72 have solid aluminu mounts, and I just cringed seeing a pavement that was not smooth as glass. When I yanked the body, the aluminum mounts were in pieces, all of them, so I opted for the 73 & up rubber. Best move I ever made. Driving the 68 now is a joy and pleasure.
Race Director
Joined: Apr 1999
Posts: 11,520
Likes: 13
From: CORVETTE 77 385 C.I. TEXAS
Re: Polyurethane or rubber for bodymounts? (GDaina)
Replace w/ stock 73 up specially designed per Duntov, no roll, etc.. No squeaks that some earlier model owners complain about. My 77 has always been very solid even w/ FE-7.
George
Nice photo & wheels ! :cool:
George
Nice photo & wheels ! :cool:
Race Director
Joined: Dec 1999
Posts: 16,945
Likes: 9
Re: Polyurethane or rubber for bodymounts? (Ganey)
Energy Suspension is having production probs... I've been waiting for mine for a couple of months now. I suspect it's a quality prob.
If you go to poly I suggest you try another manuf. else you'll have to wait :(
Marck
If you go to poly I suggest you try another manuf. else you'll have to wait :(
Marck
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Melting Slicks
Joined: Feb 1999
Posts: 2,473
Likes: 10
From: New Paltz, New York USA
Re: Polyurethane or rubber for bodymounts? (tom75)
Tom 75,
I just bought my new body mounts today, I got the rubber body mount kit. It cost me $159.99 plus tax. Heck the old ones have been in there for 20 years so the new rubber ones should last a long time. Make sure you soak the bolts with lots of penetrating oil. My back mount on the passangers side won't come off because the bolt is just turning and turning. The nut must have broken lose inside. I have already drilled out the rivets and will have to get a new bracket. Good luck.
I just bought my new body mounts today, I got the rubber body mount kit. It cost me $159.99 plus tax. Heck the old ones have been in there for 20 years so the new rubber ones should last a long time. Make sure you soak the bolts with lots of penetrating oil. My back mount on the passangers side won't come off because the bolt is just turning and turning. The nut must have broken lose inside. I have already drilled out the rivets and will have to get a new bracket. Good luck.
Intermediate
Joined: May 2006
Posts: 26
Likes: 0
I am replacing a bent frame from my 71 Coupe totaled by the one and only owner back in 1973. He drove it up to 24,000 miles and smashed it then it was stored in a garage from 1973 to 2016 when I bought her. Anyways, I haven't driven in a Vette older than a 1977 since 1977 and I can't remember how it was. I can imagine aluminum hockey pucks would be horrible plus the harsh vibrations would tend to crack body joints. I always thought anything on an old car that had rubber replaced with polyurethane wouldn't be the best idea? My sons 78 Trans Am we're finishing a nut and bolt resto on I insisted to use rubber just as the factory did to make it feel new again. Poly's just sound like a p.i.t.a. and make for harsh ride conditions. Yes, if you love Vette's or Firebird/Camaro's we know not to expect the best ride but why not upgrade a bit with you C3 prior to 1973? Anything would be an improvement to metal pucks between your body and frame but unless you're a hardcore performance junky I'd think rubber is best. I read 1973 GM improved interior noise by 40% I would think a lot was credited to the body mounts?
Last edited by lamborg1; May 4, 2017 at 09:49 AM.
Team Owner
Joined: Sep 2006
Posts: 31,285
Likes: 4,375
From: Westminster Maryland
Hi l,
16 years!!!
Might this be a new record?
Many folks who have 68-72 cars like how their cars ride with the aluminum spacers….. sorta like a Corvette.
Regards,
Alan
16 years!!!
Might this be a new record?
Many folks who have 68-72 cars like how their cars ride with the aluminum spacers….. sorta like a Corvette.
Regards,
Alan
Last edited by Alan 71; May 4, 2017 at 10:31 AM.
Le Mans Master
Joined: May 2008
Posts: 9,063
Likes: 2,736
2022 C3 of the Year Finalist - Modified
Obsolete
[QUOTE=Easy Mike;1594666858]Lamborg1: you're posting in a sixteen year old thread.
[/QUOTE
And that makes technical information invalid? Why point this out? Is the information no longer valid?
[/QUOTEAnd that makes technical information invalid? Why point this out? Is the information no longer valid?
Race Director
Joined: Mar 2003
Posts: 11,608
Likes: 780
From: Eustis ( Area 51 Bat Cave ) Fl
[QUOTE=iwasmenowhesgone;1594678102]
Why scold mike, how does that help?
Why did he post what he did?,
Because the forum has a rule about reviving old threads, they would rather a new thread be started,
Why did he post what he did?,
Because the forum has a rule about reviving old threads, they would rather a new thread be started,
Racer
Joined: Mar 2011
Posts: 490
Likes: 99
From: The South
What's kinda neat is that we can pick up a 16 year old conversation and it is still completely relevant. I had no idea of the time gap until it was pointed out. 
And to be honest - the ride difference between my '72 LT-1 and my '73 L48 (both convertibles) isn't really all that noticeable.
And to be honest - the ride difference between my '72 LT-1 and my '73 L48 (both convertibles) isn't really all that noticeable.
Administrator
Joined: Jul 2000
Posts: 53,988
Likes: 6,212
From: About 1100 miles from where I call home.
I am replacing a bent frame from my 71 Coupe totaled by the one and only owner back in 1973. He drove it up to 24,000 miles and smashed it then it was stored in a garage from 1973 to 2016 when I bought her. Anyways, I haven't driven in a Vette older than a 1977 since 1977 and I can't remember how it was. I can imagine aluminum hockey pucks would be horrible plus the harsh vibrations would tend to crack body joints. I always thought anything on an old car that had rubber replaced with polyurethane wouldn't be the best idea? My sons 78 Trans Am we're finishing a nut and bolt resto on I insisted to use rubber just as the factory did to make it feel new again. Poly's just sound like a p.i.t.a. and make for harsh ride conditions. Yes, if you love Vette's or Firebird/Camaro's we know not to expect the best ride but why not upgrade a bit with you C3 prior to 1973? Anything would be an improvement to metal pucks between your body and frame but unless you're a hardcore performance junky I'd think rubber is best. I read 1973 GM improved interior noise by 40% I would think a lot was credited to the body mounts?
Last edited by vettebuyer6369; May 6, 2017 at 08:13 PM.