Suspension and Chassis Questions about your suspension? Need chassis advice?

Spring Isolators...

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Old 03-21-2011 | 12:52 AM
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SixSeriesCSi's Avatar
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From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Spring Isolators...

Is anyone running without the spring isolators? Are there different heights available? What problems will I run into by running without the spring isolators? Where can I purchase replacement spring isolators?
Old 03-21-2011 | 07:52 AM
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From: Lawrence, KS
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Re: Spring Isolators...

Originally Posted by SixSeriesCSi
Is anyone running without the spring isolators? Are there different heights available? What problems will I run into by running without the spring isolators? Where can I purchase replacement spring isolators?
Yes.

Nothing that I know of where thirdgens are concerned.

Perhaps a bit more noise as the contact will be metal on metal.

Spohn sells the fronts; the thirdgen rear isolators may have been discontinued (I understand that the replacement from GM is a fourthgen version which jacks the car up significantly.

JamesC
Old 03-21-2011 | 08:54 AM
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built91Z28's Avatar
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From: Orlando
Car: 1991 Camaro Z28
Engine: 357, Canfield heads, solid roller,
Transmission: Upgraded 03 Cobra T56
Axle/Gears: 9" 3.50 gears and Detroit Locker
Re: Spring Isolators...

Originally Posted by JamesC
Yes.

Nothing that I know of where thirdgens are concerned.

Perhaps a bit more noise as the contact will be metal on metal.

Spohn sells the fronts; the thirdgen rear isolators may have been discontinued (I understand that the replacement from GM is a fourthgen version which jacks the car up significantly.

JamesC
How signigicant? I have a buddy who actually needs to raise the back of his car about an inch. He does have the 3rd gen isolators in right now.
Old 03-21-2011 | 08:59 AM
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From: Fort Worth TX
Car: 89Z28 Vert
Engine: 350/tbi
Transmission: 700r4
Axle/Gears: 3.27 Posi
Re: Spring Isolators...

I don't have the insulators in but I did take some fuel line and cu it like a spring and wrapped just the top coil with it just to keep it from making noice and it helped. Lower it in te rear when I dropped my vert
Old 03-21-2011 | 09:18 AM
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From: Lawrence, KS
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Re: Spring Isolators...

Originally Posted by built91Z28
How signigicant? I have a buddy who actually needs to raise the back of his car about an inch.
The fourthgens should do the trick.

JamesC
Old 03-21-2011 | 01:39 PM
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SixSeriesCSi's Avatar
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From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: Spring Isolators...

Alright I think I'm going with the same setup as RockyD...

I know that the front of my car is being run without insulators, almost 100% postive. When the Eibach Sportlines went in the rear isolators were removed, the previous owner said he didn't like the stance of the car so he had them reinstalled. Unfortunately he told me they were rubber blocks used to raise the rear to give it "Muscle Car Stance"... But he did mention that they were in bad shape and needed to be replaced. I'm currently redoing the suspension on the car and lowered the rear axle to check on these so called "blocks" and see if I could replace them. -Thank You
Old 03-21-2011 | 07:22 PM
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//<86TA>\\'s Avatar
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From: Central NJ
Car: 86 Trans Am, 92 Firebird
Engine: 408 sbc, 3.1L of raw power
Transmission: TKO600, T5
Axle/Gears: Moser 9", 3:70 trutac, 3:23 torsion
Re: Spring Isolators...

the front are just a thin piece of rubber, simply for noise i believe. the rears are thicker, and will raise/lower the car about 1/2"+, they can be removed if needed and replace with a piece of heater hose to avail any noise.

FWIW, i have weight jacks front and rear in my 92, with no rubber on any of them, and they make no noticeable noise.
Old 03-21-2011 | 10:13 PM
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From: Moorpark, CA
Car: '91 GTA, '92 T/A Convertible
Engine: GTA: 350 w/Vortec heads, T/A: 305
Transmission: Pro-built 700R4
Axle/Gears: GTA: 3.27, T/A: 2.73
Re: Spring Isolators...

After I installed my Jamex springs I didn't like the stance of my car. With the lines of the car, it almost looked like my car was squating in the back. I installed a set of rear spring isolators from a '98 TA. It raised the rear up about 1". Made the stance of the car look much better.
Old 03-23-2011 | 11:33 PM
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SixSeriesCSi's Avatar
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From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: Spring Isolators...

Originally Posted by blacksunshine'91
After I installed my Jamex springs I didn't like the stance of my car. With the lines of the car, it almost looked like my car was squating in the back. I installed a set of rear spring isolators from a '98 TA. It raised the rear up about 1". Made the stance of the car look much better.
That's exactly what the previous owner said...
Any Photos of before and after?
Old 03-26-2011 | 02:44 PM
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From: Moorpark, CA
Car: '91 GTA, '92 T/A Convertible
Engine: GTA: 350 w/Vortec heads, T/A: 305
Transmission: Pro-built 700R4
Axle/Gears: GTA: 3.27, T/A: 2.73
Re: Spring Isolators...

I only have one good shot of the car before the 4th gen isolators:


and here's a couple of the car after the new isolators:

Old 03-26-2011 | 09:19 PM
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From: Cary, North Carolina
Car: 1992 RS
Engine: Carbed 350
Transmission: 700R4
Axle/Gears: 3.42 posi
Re: Spring Isolators...

You can eliminate the metal to metal by simply wrapping the top coil in electrical tape if you want to remove isolators.

If you need lift, many places sell coil spring spacers that sit in the bottom, come in many different sizes - just round aluminum pieces that go into the spring perch at bottom, and have a lip that the spring sits on.
Old 06-12-2011 | 05:17 PM
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SixSeriesCSi's Avatar
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From: Bellflower, CA
Car: 89 Formula, 85 Trans AM & 91 Bird
Engine: 5.0 CARB, 5.7L TPI & 3.1L V6
Transmission: T-5/700R4/700R4
Axle/Gears: 9 Bolt & 10 Bolt X2
Re: Spring Isolators...

I removed the Old Spring Isolators, they were deformed and one of them had split. The car is in the shop right now, but when it's out I'll let you know how it is.
Old 06-13-2011 | 11:30 AM
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From: Montreal, Canada
Car: 1986 Chevrolet Camaro IROC-Z28
Engine: TPI 310ci (LB9)
Transmission: Custom Rebuilt 700R4 - 2600 Stall
Axle/Gears: 10 bolt, 3.73 Eaton Limited-Slip
Re: Spring Isolators...

I have 4th gen isolators and they do raise the car substantially in the rear. I would actually prefer to have the 3rd gen ones as my rear I find sits way too high for my taste.
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