Need help with spring rate codes and suspension setup
Thread Starter
Melting Slicks
Joined: Feb 2002
Posts: 2,699
Likes: 2
From: The Black Hole LA
Need help with spring rate codes and suspension setup
Did a search through the archives and found some good info, but still need a little more help.
1990 vert, auto trans
I've got the FE1 RPO code, which I believe is the soft ride suspension. I would like a little stiffer setup. Like the Z51 setup. Now I know the Z51 spring rate varied from year to year. What I need to know is the the 3 letter spring code for the Z51 or other year sport suspensions and what years will properly fit my car. I understand that the verts were a little different. Need codes for front and rear springs. I'm going to try and find used springs on ebay or something.
Also I assume I will need to change the sway bars as well. Opinions on what size I need are welcome.
Thanks
1990 vert, auto trans
I've got the FE1 RPO code, which I believe is the soft ride suspension. I would like a little stiffer setup. Like the Z51 setup. Now I know the Z51 spring rate varied from year to year. What I need to know is the the 3 letter spring code for the Z51 or other year sport suspensions and what years will properly fit my car. I understand that the verts were a little different. Need codes for front and rear springs. I'm going to try and find used springs on ebay or something.
Also I assume I will need to change the sway bars as well. Opinions on what size I need are welcome.
Thanks
Drifting
Joined: Oct 2003
Posts: 1,594
Likes: 0
From: CALGARY ab
Originally Posted by hz900
Did a search through the archives and found some good info, but still need a little more help.
1990 vert, auto trans
I've got the FE1 RPO code, which I believe is the soft ride suspension. I would like a little stiffer setup. Like the Z51 setup. Now I know the Z51 spring rate varied from year to year. What I need to know is the the 3 letter spring code for the Z51 or other year sport suspensions and what years will properly fit my car. I understand that the verts were a little different. Need codes for front and rear springs. I'm going to try and find used springs on ebay or something.
Also I assume I will need to change the sway bars as well. Opinions on what size I need are welcome.
Thanks
1990 vert, auto trans
I've got the FE1 RPO code, which I believe is the soft ride suspension. I would like a little stiffer setup. Like the Z51 setup. Now I know the Z51 spring rate varied from year to year. What I need to know is the the 3 letter spring code for the Z51 or other year sport suspensions and what years will properly fit my car. I understand that the verts were a little different. Need codes for front and rear springs. I'm going to try and find used springs on ebay or something.
Also I assume I will need to change the sway bars as well. Opinions on what size I need are welcome.
Thanks
Le Mans Master
Joined: Jan 2004
Posts: 7,276
Likes: 3
From: Why are there squished peanut butter cups in my underware?
`90 vert will have;
front FHC 93.1
rear RCA 39.9
The only stiffer front spring is the 115.5 rate code FHB
Z51 and Z07 used 57.2 rate code NYU on the rear.
front FHC 93.1
rear RCA 39.9
The only stiffer front spring is the 115.5 rate code FHB
Z51 and Z07 used 57.2 rate code NYU on the rear.
Thread Starter
Melting Slicks
Joined: Feb 2002
Posts: 2,699
Likes: 2
From: The Black Hole LA
Originally Posted by Z-07 freak
`90 vert will have;
front FHC 93.1
rear RCA 39.9
The only stiffer front spring is the 115.5 rate code FHB
Z51 and Z07 used 57.2 rate code NYU on the rear.
front FHC 93.1
rear RCA 39.9
The only stiffer front spring is the 115.5 rate code FHB
Z51 and Z07 used 57.2 rate code NYU on the rear.
Thanks, thats what I was looking for.
Now can anyone give me any info on what sway bars to use to complement these springs. I'm going to post in the auto-X section as well, good idea.
Le Mans Master
Joined: Jan 2004
Posts: 7,276
Likes: 3
From: Why are there squished peanut butter cups in my underware?
ZR1s with the 11" rear wheels used a 26mm rear sway bar. The first year of the Z07 also used the thicker 26mm on the rear, even though it uses the standard 9.5" rear wheel.
Then in `92 when all Vettes switched to the Eagle GS-Cs, the Z07s tested better with the standard 24mm rear sway bar.
The 30mm front that the Z07 and most Z51s use is great for eliminating body roll.
Then in `92 when all Vettes switched to the Eagle GS-Cs, the Z07s tested better with the standard 24mm rear sway bar.
The 30mm front that the Z07 and most Z51s use is great for eliminating body roll.
