What make polyurethane bushings better?
Safety Car
Joined: Aug 1999
Posts: 4,352
Likes: 252
From: Minnesota
Re: What make polyurethane bushings better? (97C5ENVY)
Maintains suspension geometry, better feel, car will be easier to recover when it gets loose. Sometime watch a Vette with stock bushings on the dyno. You'll see so much movement of the rear suspension (front to back), that it will scare you to think your car is doing that at 140 mph on a banked sweeper. Poly bushings will minimize that movement.
If you run race rubber (I run Goodyear qualifier slicks on road courses) the stock rubber bushings will wear out in a BIG hurry.
If you run race rubber (I run Goodyear qualifier slicks on road courses) the stock rubber bushings will wear out in a BIG hurry.
Burning Brakes
Joined: Apr 2002
Posts: 798
Likes: 0
From: Manchester NH
Re: What make polyurethane bushings better? (97C5ENVY)
Probably even longer, but I don't have experience with having any poly bushings in a car for more than a few years. Rubber will rot and wear whereas poly has a half life.....
Team Owner
Joined: Jul 1999
Posts: 50,808
Likes: 9
From: Buy USA products! Check the label! Employ Americans
Re: What make polyurethane bushings better? (pburant)
Advantage is suspension stays put and works better when aligned. Tire contact patch stay more constant. The first time I went to Pocono I could not believe how much more confidence I had in 140 MPH banking. It's a bunch of work but worth it to handle tops :D
Melting Slicks
Joined: Aug 2000
Posts: 2,112
Likes: 2
From: Sindelfingen Germany
Re: What make polyurethane bushings better? (97C5ENVY)
In addition the replies above:
the rubbers are for comfort, NVH, noise vibration harness purposes only. Why do we have cushions under our azzez?
Frederik
[Modified by C5 Frederik, 2:46 PM 12/4/2002]
the rubbers are for comfort, NVH, noise vibration harness purposes only. Why do we have cushions under our azzez?
Frederik
[Modified by C5 Frederik, 2:46 PM 12/4/2002]
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Melting Slicks
Joined: Aug 2000
Posts: 2,112
Likes: 2
From: Sindelfingen Germany
Re: What make polyurethane bushings better? (Scissors)
Where does one purchase these better bushings?
Frederik
Safety Car
Joined: Jun 2002
Posts: 3,689
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From: St Petersburg FL
St. Jude Donor '07,'13
Re: What make polyurethane bushings better? (C5 Frederik)
One thing that people failed to mention is that the polygraphite bushings are self-lubricating and that the poly will free up the static load of the suspension. What I mean is that the rubber is molded to the inner and outter sleeves where the bushing is actually twisting. The poly is rotating smoothly around the inner sleeve if installed correctly so the suspension is traveling smoother. I don't think the polys ride any harsher because the static-load is less and therefore the road vibrations are transferred to the spring more not the frame. Also the poly will not break down from grease or road grime which if you have a slight power steering leak the rubbers will be eaten alive. ;)
[Modified by VBP, 7:31 PM 12/4/2002]
[Modified by VBP, 7:31 PM 12/4/2002]
Melting Slicks
Joined: Aug 2000
Posts: 2,112
Likes: 2
From: Sindelfingen Germany
Re: What make polyurethane bushings better? (VBP)
I think you mainly look at the vertical wheel force. And here I agree.
But if you take a look at the longitudinal forces to the wheel and to the a-arms, the power of a bump is transmitted harder with polys than with rubber.
Frederik
But if you take a look at the longitudinal forces to the wheel and to the a-arms, the power of a bump is transmitted harder with polys than with rubber.
Frederik
☠☣☢ Semper Ebrius ☢☣☠
Joined: Jun 2001
Posts: 83,301
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From: Virginia
Cruise-In IV-V-VI-VII Veteran
St. Jude's Donor '06
Re: What make polyurethane bushings better? (C5 Frederik)
Where does one purchase these better bushings?
Breathlessperformance, take a look on left side below "TUNERS" the four one.
Frederik
Breathlessperformance, take a look on left side below "TUNERS" the four one.
Frederik
Racer
Joined: Sep 2002
Posts: 420
Likes: 0
Re: What make polyurethane bushings better? (Speedtoy)
I though I read on CarTek's site in reference to installing their clutch, that they DO NOT REC. POLYURETHANE BUSHINGS because the computer interprets the vehicle's vibration as engine knock and pulls timing out.
What do you guys think about that?
What do you guys think about that?
Le Mans Master
Joined: Jul 2000
Posts: 7,758
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From: Fort Worth Texas
Cruise-In II Veteran
Cruise-In III Veteran
Re: What make polyurethane bushings better? (97C5ENVY)
I guess with graphite impregnated there is no squeek?
Also, are there any special tools required for installing? And does it require a realignment?
Also, are there any special tools required for installing? And does it require a realignment?
Melting Slicks
Joined: Mar 1999
Posts: 3,081
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From: Apex NC
Cruise-In II Veteran
Cruise-In III Veteran
Re: What make polyurethane bushings better? (SilverStateZ06)
what about silver states question? Is this possible? Guess who is replying! See ya Mike :D
Melting Slicks
Joined: Mar 1999
Posts: 3,081
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From: Apex NC
Cruise-In II Veteran
Cruise-In III Veteran
Re: What make polyurethane bushings better? (AVETTE)
By the way mike, did you notice the crown point IN corvette club, in its infinite wisdom :rolleyes: voted to go to bloomington gold next year instead of the Nashville 50th carvan BASH for the corvette, what a disgrace. Anyway Julie and I are going to the xmas party on Sunday the 22nd of dec. hope you and Chris can make it. I plan on making a SPEECH about the stupidity of the so-called 'vote' on this issue (many members were not present and or informed) also I have rooms booked for nashville!!! (for both of us) c5 ya
Safety Car
Joined: Jun 2002
Posts: 3,689
Likes: 1
From: St Petersburg FL
St. Jude Donor '07,'13
Re: What make polyurethane bushings better? (SilverStateZ06)
I though I read on CarTek's site in reference to installing their clutch, that they DO NOT REC. POLYURETHANE BUSHINGS because the computer interprets the vehicle's vibration as engine knock and pulls timing out.
What do you guys think about that?
What do you guys think about that?
We've sold many polygraphite bushings for the C-5 and never had that problem. We also sell poly motor and tranny mounts which if the computer interprets road shock as a knock it would definately do it then. Never had anything like that happen because the engine is still isolated from the frame. I could see the problem if someone used solid motor mounts. :thumbs: