C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Poly bushing question

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Old Oct 11, 2004 | 12:48 PM
  #1  
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Default Poly bushing question

While I have the rear diff and suspesion apart,I was going to do the
bushings.My question is do they increase road noise transmision through
the interior of the car because they are more rigid????I would post
some pics if I could figure out how to.
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Old Oct 11, 2004 | 12:55 PM
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Nah... I don't think so. But then my exhaust is so loud who could tell?? :-)
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Old Oct 11, 2004 | 02:03 PM
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Hopefully JrRifleCoach will check in soon. He did the whole car.
This is on my winter project list so I am all ears
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Old Oct 11, 2004 | 03:25 PM
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I did the entire energy suspension kit as well as lowering my '92. I didn't really notice any additional harshness in the ride, and no more road noise than stock. Just have to watch out even more now for those speed bumps!!
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Old Oct 11, 2004 | 03:47 PM
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Man have fun with the batwing if you do those 2 bushings.... JFC those factory bushing sleeves were a PITFA to get out... Iwish they would have manufactured a poly bushing that just fit inside the sleeve..

FWIW I noticed a little more harshness and slight noise variation...But nothing too bad...On other cars it was worse>>but for some reason the vette switch was not as bad>>i guess its becaus its somewhat harsh stock..
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Old Oct 11, 2004 | 04:00 PM
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You can carefully cut through that sleeve with a hacksaw (or sawzall if careful) once the rubber is out. Then you can use a punch and knock it in. Not too bad a job.
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Old Oct 11, 2004 | 04:01 PM
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When I did just the rear on my 90 I did not notice a significant increase in noise or vibration but the bumps feel different - much more crisp. I can feel the difference between how the front mushes over a speed bump and how the rear follows the bump.

Getting the Batwing metal sleeves out is no big deal. I used a hacksaw blade (no frame) to cut a line in the sleeve and then used a hammer and punch to knock it in then out. Takes awhile but its not too tough.

FWIW

Dale
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Old Oct 11, 2004 | 04:12 PM
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I did not want to risk the hacksaw cut...Because had I cut into the aluminum I would have a new stress riser in the batwing...But I originally tried to press it out...Then ended up beating it in on itself...
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Old Oct 11, 2004 | 06:12 PM
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Originally Posted by vsocks
You can carefully cut through that sleeve with a hacksaw (or sawzall if careful) once the rubber is out. Then you can use a punch and knock it in. Not too bad a job.
I did it with a triangular file because I quit buying hacksaw blades when I bought a cut-off wheel! Not hard at all. The worst part of any the bushings is removing the old ones. I cut the rubber down flush with a utility knife, pressed out the metal centers first and then the rubber. They can be rigged up and done in a 6" vise with large sockets, bolts, washers, etc.
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Old Oct 11, 2004 | 09:40 PM
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Originally Posted by purplemajesty
I did the entire energy suspension kit as well as lowering my '92. I didn't really notice any additional harshness in the ride, and no more road noise than stock. Just have to watch out even more now for those speed bumps!!

I did the same on my 85 and I agree with purplemajesty
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Old Oct 12, 2004 | 12:55 AM
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I've only done my rear, and I think It's a little harsher, not much though . But then I have the Z-51 bone jarring suspension anyway. You probably already know; lube 'um real good. I did an A-body car years ago...pulled 'um out pretty quick. Pot-holes would rattle your brain.

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