Rear spring upgrade?
Thread Starter
Burning Brakes
Joined: May 2009
Posts: 1,014
Likes: 7
From: Ft Wayne IN
Rear spring upgrade?
Do these stock springs fatigue like metal springs over the years? If a spring has the same lb. rating is it the same as say a VBP or other composite spring?
Team Owner
Joined: Aug 2005
Posts: 34,988
Likes: 515
From: Riverside County Southern California
Co-winner 2020 C4 of the Year - Modified
2018 Corvette of Year Finalist
2017 C4 of Year
2016 C7 of Year Finalist
St. Jude Donor '09 thru '20
The VBP monospring droops a lot and fast.
I installed the Sport package in May 2008, in Oct 2009 I had to raise the front 1/2" because it was rubbing the fender/hood. Last Saturday I notice it is rubbing again therefore and needless to say it is drooping again.
I hope other members with other companies' aftermarket monospring chime in for me to start making an assessment on which one to buy next.
I installed the Sport package in May 2008, in Oct 2009 I had to raise the front 1/2" because it was rubbing the fender/hood. Last Saturday I notice it is rubbing again therefore and needless to say it is drooping again.
I hope other members with other companies' aftermarket monospring chime in for me to start making an assessment on which one to buy next.
Safety Car
Joined: Apr 2011
Posts: 3,660
Likes: 22
BTW...
you do NOT have to go by what the yr model is...all 84 thru 89 work. There is something for everyone in those yrs.
Trust me when I tell you that you'll have to live with whatever you should choose, so choose wisely. A stiffer rear (Z51 '84) is tempting for that road hugging race car feel, but on the street it can get old fast.
Safety Car
Joined: Sep 2010
Posts: 3,752
Likes: 190
From: Indiana PA
Why do you think yours are wore out?
FYI, compared to a steel spring, fiberglass springs have an infinite lifetime. When the developed these at GM the typical steel spring lasted only 250,000 full cycles on a test machine, the fiberglass spring went past 2 million and the engineers gave up. Showed little signs of fatigue with no loss in ability to carry weight or in spring stiffness.
FYI, compared to a steel spring, fiberglass springs have an infinite lifetime. When the developed these at GM the typical steel spring lasted only 250,000 full cycles on a test machine, the fiberglass spring went past 2 million and the engineers gave up. Showed little signs of fatigue with no loss in ability to carry weight or in spring stiffness.
Last edited by 93Rubie; Jun 28, 2011 at 10:39 PM. Reason: More precise data.
Thread Starter
Burning Brakes
Joined: May 2009
Posts: 1,014
Likes: 7
From: Ft Wayne IN
[I] don't know if it is I was just checking on the likleyhood that is might be with the amount of miles on it. I have nothing to compare it to I don't know anyone with a C4 and I have never owned another.
However I am looking at upgrading the ride next as wasn't sure to stay with stock or go the coilover route. I have herd arguments on both. It would be mice if I only had to buy new shocks to be happy
However I am looking at upgrading the ride next as wasn't sure to stay with stock or go the coilover route. I have herd arguments on both. It would be mice if I only had to buy new shocks to be happy
