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'81 Corvette Rear Sway Bar - What size?

8.8K views 4 replies 5 participants last post by  6880 Mike  
#1 ·
'81 Corvette Rear Sway Bar - What size?

I have no rear sway bar on my '81 C3 Corvette now??
I've decided that I want a rear sway bar and a installation kit that should include mounting brackets, bushings , links, washers, spacers, in other words what ever mounting hardware that is needed to mount a rear sway bar to a '81 vette that did not come with a rear sway bar.

I was told to get the 7/16" size because bigger is not better with rear sway bars.

Does anyone know the correct size to get & if there is a installation kit that contains all the parts that I need?

Where should I get them?

thanks
 
#2 ·
Rear Sway Bars 101

Most car manufacturers build in understeer so an inexperienced driver can instinctively control the car. In a race situation, oversteer is prefered because an experienced driver can control the car easier and corner faster. To reduce understeer you add oversteer to the car by increasing front tire and wheel size, stiffening the rear spring, increasing front tire pressure, and/or increasing the rear stabilizer bar.

Generally, there are two "schools of thought" in setting up a car suspension for cornering/handling, soft springs/stiff (thicker) anti-sway bars or stiff springs/soft (thinner) anti-sway bars.

The soft spring/stiff anti-sway bar setup, with matched (to the spring rates) shock absorbers, gives you a very flat cornering car with a liveable ride on the street.

The stiff spring/soft anti-sway bar approach also gives you a flat cornering car, but the ride is extremely harsh and best suited for a smooth surface, race track.

[http://www.nastyz28.com]

I believe your sway bar options will be between 7/8, 3/4, & 5/8th. Guldstrand Engineering will recommend spring rates, anti-sway bars, and shock absorbers for your car, based on your input/application, and has all the top quality parts you need.

Guldstrand Motorsports
Dave Tillotson
Phone: 818-558-1499
Email: info@guldstrand.com (please include your phone number)

C'ya
D
 
#4 ·
Most car manufacturers build in understeer so an inexperienced driver can instinctively control the car. In a race situation, oversteer is prefered because an experienced driver can control the car easier and corner faster. To reduce understeer you add oversteer to the car by increasing front tire and wheel size, stiffening the rear spring, increasing front tire pressure, and/or increasing the rear stabilizer bar.

Generally, there are two "schools of thought" in setting up a car suspension for cornering/handling, soft springs/stiff (thicker) anti-sway bars or stiff springs/soft (thinner) anti-sway bars.

The soft spring/stiff anti-sway bar setup, with matched (to the spring rates) shock absorbers, gives you a very flat cornering car with a liveable ride on the street.

The stiff spring/soft anti-sway bar approach also gives you a flat cornering car, but the ride is extremely harsh and best suited for a smooth surface, race track.

[http://www.nastyz28.com]

I believe your sway bar options will be between 7/8, 3/4, & 5/8th. Guldstrand Engineering will recommend spring rates, anti-sway bars, and shock absorbers for your car, based on your input/application, and has all the top quality parts you need.

Guldstrand Motorsports
Dave Tillotson
Phone: 818-558-1499
Email: info@guldstrand.com (please include your phone number)

C'ya
D
This pretty much hits the nail on the head. If you have access to an area big enough to serve as a skid pad drive you car in about a 2 or 3 hundred ft faster and faster circle until the front or rear tires skid out.

The rear sliding out is over steer and corrected by increasing rear traction or decreasing front. The front sliding is under steer, and is corrected in the opposite manner.

There is no set rule and depends on the car and tires. Also alot by what the driver wants.

Under steer can be unnerving to an inexperienced driver as they are not trained on how to deal with it
 
#5 ·
Put the optional FE7 rear set up on it. Right side link and bar shown here.
Image


Left side is the same.

Your stock trailing arms will have the mounting holes for the sway bar brackets. Your frame has the holes for the mounts.

You can find complete set ups on eBay.

Purchase the 81 assembly instruction manual (AIM) and take a look at the factory installation for the optional FE7 suspension package.

:thumbsup: