Front spring ID ??
Thread Starter
Burning Brakes
Joined: May 2010
Posts: 900
Likes: 3
From: Cary illinois
Front spring ID ??
What are the big front springs for an early C4 and how do I identify them .
Looking for the stiffist ft. spring I can find
Stiffist ....is that really a word ?
Looking for the stiffist ft. spring I can find
Stiffist ....is that really a word ?
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
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St. Jude Donor '09 thru '20
If you mean monospring (fiberglass) contact Van Steel (Paul). They sell three different types of monosprings for the C4. 
To ID them, you can use the Vettes RPO. Are the ones in your Vette the stock ones?
To ID them, you can use the Vettes RPO. Are the ones in your Vette the stock ones?
Safety Car
Joined: Sep 2010
Posts: 3,752
Likes: 190
From: Indiana PA
Give this a try:
http://www.corvetteactioncenter.com/...ion-chart.html
http://www.corvetteactioncenter.com/...usp_chart.html
The stiffest one according to both charts is the 88-91 Z51 115.5 N/mm. Spring code FHB, the spring codes are stamped onto the spring.
I understand, linking to other Corvette forums is a kind of "bad" thing but it helps the OP out, right?
http://www.corvetteactioncenter.com/...ion-chart.html
http://www.corvetteactioncenter.com/...usp_chart.html
The stiffest one according to both charts is the 88-91 Z51 115.5 N/mm. Spring code FHB, the spring codes are stamped onto the spring.
I understand, linking to other Corvette forums is a kind of "bad" thing but it helps the OP out, right?
Last edited by 93Rubie; Dec 4, 2011 at 04:50 PM.
Safety Car
Joined: Apr 2011
Posts: 3,660
Likes: 22
be careful what you wish for....
A tip from someone thats done the stiffer F&R....
if its a track only car, fine, but if you plan on driving it on the streets...not a good idea. The stiff springs cause endless damage to interiors and humans from the impacts being transfered past the springs and to the softer contents of the cabin..
Le Mans Master
Joined: Dec 2002
Posts: 5,270
Likes: 3
From: Seattle Area WA
I don't know about harm to humans but you might want to check the screw that holds on your rear view mirror.Rear springs interchange all years. Front only interchange from 84-87 or 88-96 as noted above.
Thread Starter
Burning Brakes
Joined: May 2010
Posts: 900
Likes: 3
From: Cary illinois
I thought the same thing..........
be careful what you wish for....
A tip from someone thats done the stiffer F&R....
if its a track only car, fine, but if you plan on driving it on the streets...not a good idea. The stiff springs cause endless damage to interiors and humans from the impacts being transfered past the springs and to the softer contents of the cabin..
be careful what you wish for....
A tip from someone thats done the stiffer F&R....
if its a track only car, fine, but if you plan on driving it on the streets...not a good idea. The stiff springs cause endless damage to interiors and humans from the impacts being transfered past the springs and to the softer contents of the cabin..
I do track days & time attack events with the car .
If they dont like the ride they can get out , I might be nice and even slow down a little .
I have found a few 84s , but two rates are available .
Van Steel is good ,But I really dont want to spend 400 for one spring .
I think they sell an adapter for there spring for an early C4
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Safety Car
Joined: Apr 2011
Posts: 3,660
Likes: 22
The 88 & up had a different rear end dimension by a few mm and a spring to match the width. Same basic design, just slightly different in how wide.
Thread Starter
Burning Brakes
Joined: May 2010
Posts: 900
Likes: 3
From: Cary illinois
