Polyurethane Rubber
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Joined: Jan 2009
Posts: 292
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From: North Carolina
Car: Pontiac 89 GTA
Engine: 350 TPI 5.7L V8
Polyurethane Rubber
I'm Planning to replace all rubber under the car with Polyurethane Rubber. What do you think about this kit will it have everithing?
http://www.hawksthirdgenparts.com/pr...uspension.html
http://www.hawksthirdgenparts.com/pr...uspension.html
Joined: Jul 2005
Posts: 1,428
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From: Guilford, Connecticut
Car: 1988 IROC-Z camaro
Engine: 355 TPI
Transmission: tko 500
Axle/Gears: Dana 44 3.31 posi pbr brakes
Re: Polyurethane Rubber
Rather than just replacing the bushings in the original rear control arms and panhard bar i would just go aftermarket. The factory stuff is so flimsy i could bend it together with my hands. UMI has good sales from time to time (memorial day sale maybe?) where you can pick up a rear end suspension kit for under 200. Yes its a bit more than just buying the rubber but you get what you pay for.
As for what all poly will do for you...you WILL notice a difference. I have full poly in my car except for my motor mounts and it really is damn stiff.
As for what all poly will do for you...you WILL notice a difference. I have full poly in my car except for my motor mounts and it really is damn stiff.
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Joined: Jan 2009
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From: North Carolina
Car: Pontiac 89 GTA
Engine: 350 TPI 5.7L V8
Re: Polyurethane Rubber
Rather than just replacing the bushings in the original rear control arms and panhard bar i would just go aftermarket. The factory stuff is so flimsy i could bend it together with my hands. UMI has good sales from time to time (memorial day sale maybe?) where you can pick up a rear end suspension kit for under 200. Yes its a bit more than just buying the rubber but you get what you pay for.
As for what all poly will do for you...you WILL notice a difference. I have full poly in my car except for my motor mounts and it really is damn stiff.
As for what all poly will do for you...you WILL notice a difference. I have full poly in my car except for my motor mounts and it really is damn stiff.
What do you think?
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Joined: Nov 2004
Posts: 332
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From: Houston MS
Car: 87 GTA Trans Am
Engine: 305 TPI
Transmission: 700R4
Axle/Gears: 10 bolt posi 3.23
Re: Polyurethane Rubber
If you plan on changing the parts later save some money and just replace whats bad with stock rubber stuff from the parts house. Hell it lasted 25 years new stuff will last a long time also.
All my back stuff has rod ends and my front a-arms have Del-A-Lum bushings. IN other words the only ones left on my car are the ones for my sway bars and they are greeseable brackets with polly bushings and polly end links.
That kit basically has nothing for my car that was why I noticed the sway-bar stuff missing.
All my back stuff has rod ends and my front a-arms have Del-A-Lum bushings. IN other words the only ones left on my car are the ones for my sway bars and they are greeseable brackets with polly bushings and polly end links.
That kit basically has nothing for my car that was why I noticed the sway-bar stuff missing.
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From: Charlestown, IN
Car: 1971 Camaro
Engine: 427
Transmission: TKO600
Axle/Gears: 3.73
Re: Polyurethane Rubber
If you plan on changing the parts later save some money and just replace whats bad with stock rubber stuff from the parts house. Hell it lasted 25 years new stuff will last a long time also.
All my back stuff has rod ends and my front a-arms have Del-A-Lum bushings. IN other words the only ones left on my car are the ones for my sway bars and they are greeseable brackets with polly bushings and polly end links.
That kit basically has nothing for my car that was why I noticed the sway-bar stuff missing.
All my back stuff has rod ends and my front a-arms have Del-A-Lum bushings. IN other words the only ones left on my car are the ones for my sway bars and they are greeseable brackets with polly bushings and polly end links.
That kit basically has nothing for my car that was why I noticed the sway-bar stuff missing.
Poly front and the same sway bar stuff as yours.
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Joined: Apr 2006
Posts: 4,482
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From: Northern, CA
Car: 1989 Iroc-Z Camaro
Engine: TBI,5.0
Transmission: Automatic 700R4
Axle/Gears: Eaton Posi,3.42,LPW Ultimate Cover
Re: Polyurethane Rubber
This might present the perfect opportunity to install the Energy Suspension motor mounts.
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From: North Carolina
Car: Pontiac 89 GTA
Engine: 350 TPI 5.7L V8
Re: Polyurethane Rubber
Thank you all for the info. Insted of buying the Kitt I'll probably by them separate and change them as I buy them so I don't spend in parts I'll probably replace later any way
Joined: Feb 2003
Posts: 2,498
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From: PNW
Car: 91 Black Formula KR
Engine: 305 TPI R69/G92
Transmission: Astro A5-Pro 5.0-McCleod
Axle/Gears: US Gear 3.42 Eaton True Trac
Re: Polyurethane Rubber
As may have been noted, different years / models had different size sway bar bushings...
And there were 2 different torque arm bushings too...
For $200 or so you can get aftermarket lower control arms and panhard bar, you will notice a difference... if you're keeping stock height, get non adjustable ones, but if you car is lowered (or raised I guess), get the adjustable ones, a bit more... Do a little bit at a time... I started with a stock 91 Formula, and a step at a time, improved the suspension... and it is day and night difference from now and where it started....
Rafael
And there were 2 different torque arm bushings too...
For $200 or so you can get aftermarket lower control arms and panhard bar, you will notice a difference... if you're keeping stock height, get non adjustable ones, but if you car is lowered (or raised I guess), get the adjustable ones, a bit more... Do a little bit at a time... I started with a stock 91 Formula, and a step at a time, improved the suspension... and it is day and night difference from now and where it started....
Rafael
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Joined: Jan 2009
Posts: 292
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From: North Carolina
Car: Pontiac 89 GTA
Engine: 350 TPI 5.7L V8
Re: Polyurethane Rubber
As may have been noted, different years / models had different size sway bar bushings...
And there were 2 different torque arm bushings too...
For $200 or so you can get aftermarket lower control arms and panhard bar, you will notice a difference... if you're keeping stock height, get non adjustable ones, but if you car is lowered (or raised I guess), get the adjustable ones, a bit more... Do a little bit at a time... I started with a stock 91 Formula, and a step at a time, improved the suspension... and it is day and night difference from now and where it started....
Rafael
And there were 2 different torque arm bushings too...
For $200 or so you can get aftermarket lower control arms and panhard bar, you will notice a difference... if you're keeping stock height, get non adjustable ones, but if you car is lowered (or raised I guess), get the adjustable ones, a bit more... Do a little bit at a time... I started with a stock 91 Formula, and a step at a time, improved the suspension... and it is day and night difference from now and where it started....
Rafael
I'm Planning to leve stock height but change all the parts that can be improve. but not over do it bacause of the budget and because I like for now to left it as stack as possible...
Joined: Feb 2004
Posts: 735
Likes: 7
From: San Diego, CA
Car: 89 GTA
Engine: 6.0L Procharged
Transmission: T-56
Axle/Gears: 4.10
Re: Polyurethane Rubber
I hope you like squeaks and vibrations!
They will definitely stiffen up your ride, but I would avoid these:
Aftermarket rear LCA's are only used if you need to re-center your wheels. I run the stock LCA's on my 11 second TTA. I've read articles showing the stock with the rubber grommets are better because they allow some give. With poly, you are risking tweaking the "frame" where they mount, or twisting the brackets on your rear. I do have UMI's on my GTA and they squeak no matter how you lube them.
I would never put poly motor/trans mounts on a car unless it was track only. The potential vibrations may drive you crazy. You won't rip out rubber mounts unless you are launching 500HP on slicks. There are no "performance" gains to be had.
Just my opinion but I've owned several thirdgens with almost every mod available so I am speaking from real experience.
They will definitely stiffen up your ride, but I would avoid these:
Aftermarket rear LCA's are only used if you need to re-center your wheels. I run the stock LCA's on my 11 second TTA. I've read articles showing the stock with the rubber grommets are better because they allow some give. With poly, you are risking tweaking the "frame" where they mount, or twisting the brackets on your rear. I do have UMI's on my GTA and they squeak no matter how you lube them.
I would never put poly motor/trans mounts on a car unless it was track only. The potential vibrations may drive you crazy. You won't rip out rubber mounts unless you are launching 500HP on slicks. There are no "performance" gains to be had.
Just my opinion but I've owned several thirdgens with almost every mod available so I am speaking from real experience.
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Joined: Apr 2006
Posts: 4,482
Likes: 10
From: Northern, CA
Car: 1989 Iroc-Z Camaro
Engine: TBI,5.0
Transmission: Automatic 700R4
Axle/Gears: Eaton Posi,3.42,LPW Ultimate Cover
Re: Polyurethane Rubber
The only reason I mentioned replacing the motor mounts with Energy Suspension polyurethane is because if hes has to remove the lower control arm to install the new bushings than that is the time to replace them. If he wants to stay with rubber than its still a good idea. I replaced mine with new poly. made buy Energy Suspension because I had read that they had some give to them as opposed to the Prothane brand that were hard as rocks.Any way I replaced mine by myself with out removing the arms and it was a nightmare. Another reason to replace them with poly.. I don't want to have to do that again for a very long time. If your car rides like a Cadillac and you want it to stay that way than you might want to skip the poly. mounts but if you don't mind the slight vibration created by the engine,that feels like a muscle car should than as I said skip them and use rubber.(its a slight thumping vibration not a buzz type)
As mentioned above I also would keep the rubber transmission mounts .That seems to be the spot where the "major" vibration can sometimes come from.
As mentioned above I also would keep the rubber transmission mounts .That seems to be the spot where the "major" vibration can sometimes come from.
Last edited by Ron U.S.M.C.; May 23, 2013 at 01:31 PM.
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Joined: Nov 2004
Posts: 332
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From: Houston MS
Car: 87 GTA Trans Am
Engine: 305 TPI
Transmission: 700R4
Axle/Gears: 10 bolt posi 3.23
Re: Polyurethane Rubber
No one on this forum has complained about that that I know of. Even so it would be a HP problem not a part problem. If your pushing 1,000 HP yea some extra bracing would be in order.
Also I think he decided to go with rubber to save money for now.
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Joined: Jan 2009
Posts: 292
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From: North Carolina
Car: Pontiac 89 GTA
Engine: 350 TPI 5.7L V8
Re: Polyurethane Rubber
Went under my car this Weekend and found out I already Have:
1. Rear Lower control Arms By Hotchkis
2. The Bar that locate the Diff by Hotchkis
I felt like I just got a present
For the bad side:
1. The end link are completely gone front And Rear
2. The Front Mounts are crack (Rear Look Good)
3. The rubber for the traction Bar look that will need to be replace soon
4. The Swey bars have rust on them
2. The Front Lower Control Arm Bushing are crack
So I'm goin to start by changing the end links with the mounts clean and paint tha bars. Anny sugestion on the rubber?
would thes be good? (http://www.autozone.com/autozone/par...64_432492_5611_)
1. Rear Lower control Arms By Hotchkis
2. The Bar that locate the Diff by Hotchkis
I felt like I just got a present
For the bad side:
1. The end link are completely gone front And Rear
2. The Front Mounts are crack (Rear Look Good)
3. The rubber for the traction Bar look that will need to be replace soon
4. The Swey bars have rust on them
2. The Front Lower Control Arm Bushing are crack
So I'm goin to start by changing the end links with the mounts clean and paint tha bars. Anny sugestion on the rubber?
would thes be good? (http://www.autozone.com/autozone/par...64_432492_5611_)
Last edited by carattini; Jun 3, 2013 at 02:01 PM.
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From: Pgh PA
Car: 89 5.7 IROC/95 LT1 Corvette
Engine: All 5.7's
Transmission: 700R4 (Roessler)/ZF6
Axle/Gears: 10 bolt Zexel 3.23's. CTW 17" wheel
Re: Polyurethane Rubber
Went under my car this Weekend and found out I already Have:
1. Rear Lower control Arms By Hotchkis
2. The Bar that locate the Diff by Hotchkis
I felt like I just got a present
For the bad side:
1. The end link are completely gone front And Rear
2. The Front Mounts are crack (Rear Look Good)
3. The rubber for the traction Bar look that will need to be replace soon
4. The Swey bars have rust on them
2. The Front Lower Control Arm Bushing are crack
So I'm goin to start by changing the end links with the mounts clean and paint tha bars. Anny sugestion on the rubber?
would thes be good? (http://www.autozone.com/autozone/par...64_432492_5611_)
1. Rear Lower control Arms By Hotchkis
2. The Bar that locate the Diff by Hotchkis
I felt like I just got a present
For the bad side:
1. The end link are completely gone front And Rear
2. The Front Mounts are crack (Rear Look Good)
3. The rubber for the traction Bar look that will need to be replace soon
4. The Swey bars have rust on them
2. The Front Lower Control Arm Bushing are crack
So I'm goin to start by changing the end links with the mounts clean and paint tha bars. Anny sugestion on the rubber?
would thes be good? (http://www.autozone.com/autozone/par...64_432492_5611_)
I went with all PST in a kit for my car, including the motor mounts. No problems no complaints.
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From: Los Angeles
Car: 1991 RS/B4C clone
Engine: 355 TPI
Transmission: Probuilt Street/Strip 700r4
Axle/Gears: 7.625 axle with 3.23 gears/TrueTrac
Re: Polyurethane Rubber
I hope you like squeaks and vibrations!
They will definitely stiffen up your ride, but I would avoid these:
Aftermarket rear LCA's are only used if you need to re-center your wheels. I run the stock LCA's on my 11 second TTA. I've read articles showing the stock with the rubber grommets are better because they allow some give. With poly, you are risking tweaking the "frame" where they mount, or twisting the brackets on your rear. I do have UMI's on my GTA and they squeak no matter how you lube them.
I would never put poly motor/trans mounts on a car unless it was track only. The potential vibrations may drive you crazy. You won't rip out rubber mounts unless you are launching 500HP on slicks. There are no "performance" gains to be had.
Just my opinion but I've owned several thirdgens with almost every mod available so I am speaking from real experience.
They will definitely stiffen up your ride, but I would avoid these:
Aftermarket rear LCA's are only used if you need to re-center your wheels. I run the stock LCA's on my 11 second TTA. I've read articles showing the stock with the rubber grommets are better because they allow some give. With poly, you are risking tweaking the "frame" where they mount, or twisting the brackets on your rear. I do have UMI's on my GTA and they squeak no matter how you lube them.
I would never put poly motor/trans mounts on a car unless it was track only. The potential vibrations may drive you crazy. You won't rip out rubber mounts unless you are launching 500HP on slicks. There are no "performance" gains to be had.
Just my opinion but I've owned several thirdgens with almost every mod available so I am speaking from real experience.
I had Spohn Poly LCAs on my car for 5 years, and BOTH of my LCA boxes ended up bending out of square. I replaced them with stock control arms and GM 1LE bushings. I don't get the hype for poly and tubular suspension parts. if they stock parts were good enough for SCCA, why are they terrible now?
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Joined: Aug 2011
Posts: 1,178
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From: Aloha, Oregon
Car: 1991 Christine Z28
Engine: RV Cam and Intake 350 SBC
Transmission: 5speed
Axle/Gears: 3.08 ls Posi
Re: Polyurethane Rubber
I hope you like squeaks and vibrations!
They will definitely stiffen up your ride, but I would avoid these:
Aftermarket rear LCA's are only used if you need to re-center your wheels. I run the stock LCA's on my 11 second TTA. I've read articles showing the stock with the rubber grommets are better because they allow some give. With poly, you are risking tweaking the "frame" where they mount, or twisting the brackets on your rear. I do have UMI's on my GTA and they squeak no matter how you lube them.
I would never put poly motor/trans mounts on a car unless it was track only. The potential vibrations may drive you crazy. You won't rip out rubber mounts unless you are launching 500HP on slicks. There are no "performance" gains to be had.
Just my opinion but I've owned several thirdgens with almost every mod available so I am speaking from real experience.
They will definitely stiffen up your ride, but I would avoid these:
Aftermarket rear LCA's are only used if you need to re-center your wheels. I run the stock LCA's on my 11 second TTA. I've read articles showing the stock with the rubber grommets are better because they allow some give. With poly, you are risking tweaking the "frame" where they mount, or twisting the brackets on your rear. I do have UMI's on my GTA and they squeak no matter how you lube them.
I would never put poly motor/trans mounts on a car unless it was track only. The potential vibrations may drive you crazy. You won't rip out rubber mounts unless you are launching 500HP on slicks. There are no "performance" gains to be had.
Just my opinion but I've owned several thirdgens with almost every mod available so I am speaking from real experience.
And to the OP, you'll need more than just that kit to replace all the bushings with poly. But I wouldn't put poly on the rear of the car anywhere, just get new rubber bushings.
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Member

Joined: Jan 2009
Posts: 292
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From: North Carolina
Car: Pontiac 89 GTA
Engine: 350 TPI 5.7L V8
Re: Polyurethane Rubber
Thanks for all the advice I'll let you know when i do somthing about it. I think I'm going to start with the swey bar bushings and end links since the are gone.
Joined: Mar 2008
Posts: 2,943
Likes: 20
From: Boston, MA
Car: 1983 Pontiac Trans Am Daytona 500
Engine: Crossfire 305ci V8
Transmission: Jasper 700R4 4 speed Automatic
Axle/Gears: 3.23 limited slip/posi
Re: Polyurethane Rubber
What is the part number of the energy suspension sway bar end links for the front and rear?
Joined: Mar 2008
Posts: 2,943
Likes: 20
From: Boston, MA
Car: 1983 Pontiac Trans Am Daytona 500
Engine: Crossfire 305ci V8
Transmission: Jasper 700R4 4 speed Automatic
Axle/Gears: 3.23 limited slip/posi
Thread Starter
Member

Joined: Jan 2009
Posts: 292
Likes: 0
From: North Carolina
Car: Pontiac 89 GTA
Engine: 350 TPI 5.7L V8
Re: Polyurethane Rubber
Check Heare
http://www.hawksthirdgenparts.com/pr...uspension.html
I don't know if one size fits all but you can call them and ask.
http://www.hawksthirdgenparts.com/pr...uspension.html
I don't know if one size fits all but you can call them and ask.
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Member

Joined: Jan 2009
Posts: 292
Likes: 0
From: North Carolina
Car: Pontiac 89 GTA
Engine: 350 TPI 5.7L V8
Re: Polyurethane Rubber
I just ordered front and rear swey bar bushins and endlinks. hoping to get it soon so i can install it.
this is wat i got.
http://www.hawksthirdgenparts.com/pr...uspension.html
http://www.hawksthirdgenparts.com/pr...uspension.html
http://www.hawksthirdgenparts.com/pr...-Complete.html
this is wat i got.
http://www.hawksthirdgenparts.com/pr...uspension.html
http://www.hawksthirdgenparts.com/pr...uspension.html
http://www.hawksthirdgenparts.com/pr...-Complete.html
Joined: Mar 2008
Posts: 2,943
Likes: 20
From: Boston, MA
Car: 1983 Pontiac Trans Am Daytona 500
Engine: Crossfire 305ci V8
Transmission: Jasper 700R4 4 speed Automatic
Axle/Gears: 3.23 limited slip/posi
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Joined: Aug 2013
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From: sw washington
Car: 1986 Sport Coupe
Engine: 305 V-8 670 cfm Holley st avenger
Transmission: T5
Axle/Gears: 13-42
Re: Polyurethane Rubber
Ty everyone my mechanic talked me into poly but I havent bought the parts yet but u talked me out of it. Rubber it is.
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