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C4 Bushings

Old 10-07-2018, 11:03 AM
  #1  
juergenc478
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Default C4 Bushings

Hello!
I've already the stock bushings in my 1992 Vette.
Now it's time to change it.
I've installed a KW Automotive Coilover suspension kit (instead normal shocks with Leaf spring).

There are different types of polyurethan bushings kits for the C4. I find black and red one from Prothane and Energysuspension. Both manufactures means the hardness of both color types are the same. Don't know what they are using for - street or race?

Powerflex built different hardness with color code: yellow for street, purple for performance and black for race. But they don't produce bushings for the Corvette.

Do you know other manufactures. I'm looking for a street version. What woul be your experience?
The KW coilover is very strong/hard for street driving and i don't want to get the car more harder than yet.

Thanks for your opinion.
Best regards!
​​​​​​​Juergen

Last edited by juergenc478; 10-07-2018 at 03:28 PM.
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Old 10-07-2018, 09:39 PM
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Kevova
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Both high energy and prothane sell street/ track urethane bushings, the color has no meaning. Red is noticeable or "showy", black doesn't stand out snd may pass for stock at a glance.
i have prothane they do add to a rougher ride and noise on irregular surfaces.

Last edited by Kevova; 10-07-2018 at 09:41 PM.
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Old 10-08-2018, 09:33 AM
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jmgtp
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The black bushings from Energy Suspension are graphite impregnated.
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Old 10-08-2018, 11:30 AM
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drcook
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There is a new offering that just came out this year. They are a bit more pricey than the urethane bushings. The company that makes them is out of Australia and supplies bushings for lots of autos. The companies name is SuperPro. I found it best to look at the Australian (home company site).

https://superpro.com.au/

https://corvettesalvage.com/product/...kit-1984-1996/

https://corvettesalvage.com/product/...set-1984-1996/

Summit Racing is carrying them, not for C4 Corvettes though. At this time there are only 2 businesses in the US that have them. I found them doing some searches one evening. (the original company and then found out that another place I deal with is associated with the 1st and is carrying them for the same price and shipping, ie: free).

Super Pro states that their warranty is:

These bushings carry a lifetime guarantee from SuperPro, the largest performance bushing manufacturer in the world
I will be putting a set of these in the batwing of the Dana 44 I am rebuilding for installation into my 96 A4 LT1 car.

Watch how easy they install in the dogbones

​​​​​​​
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Old 10-11-2018, 12:57 AM
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MikieG1971
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Talked to this guy. Bought his kit. Have yet to get them installed.
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Old 10-11-2018, 05:50 AM
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blackozvet
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Originally Posted by juergenc478 View Post
Hello!
I've already the stock bushings in my 1992 Vette.
Now it's time to change it.
I've installed a KW Automotive Coilover suspension kit (instead normal shocks with Leaf spring).
There are different types of polyurethan bushings kits for the C4. I find black and red one from Prothane and Energysuspension. Both manufactures means the hardness of both color types are the same. Don't know what they are using for - street or race?
Powerflex built different hardness with color code: yellow for street, purple for performance and black for race. But they don't produce bushings for the Corvette.
Do you know other manufactures. I'm looking for a street version. What woul be your experience?
The KW coilover is very strong/hard for street driving and i don't want to get the car more harder than yet.
Thanks for your opinion.
Best regards!
Juergen
I wouldnt worry too much about the color - its a personal preference, just go with Prothane or Energy kits.
Polyurethane is fine for street use, certainly much better than 20 or 30 year old rubber !
Ive got Poly, rubber, rod ends, and duralum in my suspension and dont have any issues with excessive harshness from any of them, but I guess thats a personal thing.

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