Spring Rate code info
Thread Starter
Instructor
Joined: Oct 2002
Posts: 135
Likes: 0
From: Pitman NJ
Spring Rate code info
I'm researching springs rates codes for a C4. I'm looking for a break down of the 3 letter codes stamped into the spring so I can cross-reference those to the yearly suspension packages and Newton/millimeter values. Is there a published chart with all this info in one place? Many thanks…..
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
http://www.corvetteactioncenter.com/...usp_chart.html
There was another list with the 3 digit codes around but can't find the link.
There was another list with the 3 digit codes around but can't find the link.
Last edited by rodj; Jun 13, 2007 at 03:14 AM.
Tech Contributor
Joined: Jun 2004
Posts: 20,847
Likes: 959
From: I tend to be leery of any guy who doesn't own a chainsaw or a handgun.
I asked the same question a year or two ago, but never got an answer. Hopefully the chart now exists, as it would be handy to carry around when looking at springs at swap meets.
Le Mans Master
Joined: Jan 2002
Posts: 9,036
Likes: 13
From: Edmonton AB
Several threads on the subject reside in the C4 Tech archives.
Here are a couple, compliments of the Advanced Search feature
Springs & spring rates - how to identify?
CF Member JasonL's .xls chart
http://www.tubas.net/vette/spring-codes.xls
Peer review of JasonL's chart with comments from Z-07 freak
spring codes....who wants em?
Fiche scans of front/rear spring codes from carfiche.com. Z-07 freak
has stated there are errors in these docs but has not provided details.
http://www.tubas.net/vette/
.
Here are a couple, compliments of the Advanced Search feature
Springs & spring rates - how to identify?
CF Member JasonL's .xls chart
http://www.tubas.net/vette/spring-codes.xls
Peer review of JasonL's chart with comments from Z-07 freak
spring codes....who wants em?
Fiche scans of front/rear spring codes from carfiche.com. Z-07 freak
has stated there are errors in these docs but has not provided details.
http://www.tubas.net/vette/
.
Le Mans Master
Joined: Jan 2002
Posts: 9,036
Likes: 13
From: Edmonton AB
Hib Halverson's revised version of his suspension chart.
'Hib updated this March 17, 2002.'
I have not looked to see whether this differs from the
version that appears at CorvetteActionCenter or
the html version that resides elsewhere in idavette.net.
.
'Hib updated this March 17, 2002.'
I have not looked to see whether this differs from the
version that appears at CorvetteActionCenter or
the html version that resides elsewhere in idavette.net.
.
Le Mans Master
Joined: Jan 2004
Posts: 7,276
Likes: 3
From: Why are there squished peanut butter cups in my underware?
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Thread Starter
Instructor
Joined: Oct 2002
Posts: 135
Likes: 0
From: Pitman NJ
More spring code chat
Thanks for the info, I'm more frustrated now than when I started. From all the old threads and the new responses I'm no closer to finding the definitive answers to my questions. For what it’s worth here is my three bears story: I swapped out my FHB/NYU combo because it was too hard. The car was skating across the track, no bite on any kind of track surface bump, plus loose condition too. I then installed FSS/RHZ like I had on my 94 street Vette. Way too soft! I never considered that the racecar was hundreds of pounds lighter. Plus it sits up high like a 4x4, this even after multiple races. Getting you car in the air a few times (Hoosier Hill @ Grattan) aint goin’ to make a difference. That FSS spring just has too much curve to it. The rear spring RHZ is a great drag race spring, the *** end squats way down tons of forward bite but this exacerbates the already high front end to the point that the camber starts to go positive causing a wicked push. I’m looking for the perfect bed in between. I’d love to find out the spring rate for a FSK GM part#17997091 it’s off a 92-93 heavy-duty suspension (FE7). Thanks for the help. If I ever run into a complete trustworthy list I’ll post it.
Drifting
Joined: Jul 2006
Posts: 1,483
Likes: 3
From: Newark, New Jersey
I'm researching springs rates codes for a C4. I'm looking for a break down of the 3 letter codes stamped into the spring so I can cross-reference those to the yearly suspension packages and Newton/millimeter values. Is there a published chart with all this info in one place? Many thanks…..
NYU'89 90 HD FE7 excFX3
NYU'91-95 HD FE7
BMF'84 exc HD FE7
BMH'84 HD FE7
NYR '86 HD FE7
NYR '87-01 Soft ride FE1
NYR '89-90 HD FE7 w/FX3
NYR '92-93 Soft ride FE1
I found these on the web, dont know how accurate they are.
Melting Slicks
Joined: May 2004
Posts: 2,286
Likes: 2
From: Stamping Ground KY
Le Mans Master
Joined: Jan 2002
Posts: 9,036
Likes: 13
From: Edmonton AB
But since you bring it up, Z-07 freak, as John Donne said: 'No man is
an Island, entire of itself.'
From 03-01-2004
Originally Posted by Z-07 freak
Originally Posted by okinawa86vette
Originally Posted by Z-07 freak
Originally Posted by JasonL
This is what I have so far. We should all compile our info together and
check for accuracy...
check for accuracy...
Jason, I have to respect someone who has taken the time to construct
their own version of a C4 suspension chart. There are a few errors, but
overall it's very good.
The only thing I can't confirm 100%, is the 95-96 FE1 front springs. I
know what the rate should be, but the codes I have seen on them are
for earlier years and different rates.
Hopefully Chris can provide me with the info from his parts CD, and I
can complete this masterpiece.
different codes and part numbers for what's described as the same thing.
If you can email it to me, I will Rosetta Stone this gobbledygook for all!
.
a Rosetta Stone on C4 spring codes and rates?
.
Thread Starter
Instructor
Joined: Oct 2002
Posts: 135
Likes: 0
From: Pitman NJ
close but no cigar
I found a FHA at Contemporary Corvette boneyard in Bristol PA for $150. They did not have the FSK so I went with common the dirt spring. Picking it up tomorrow and if all is right with the world it goes in this weekend. I hope it’s really rated at 93.1 with not too much arch in it. I’d hate to waste money, effort & track time to find out I’m still off the mark. Can’t wait to compare it to the FSS and see how much flatter it is. Stay tuned…….
Le Mans Master
Joined: Jan 2002
Posts: 9,036
Likes: 13
From: Edmonton AB
If desired, use N/mm * 5.710 = lbs/in as a conversion factor
88-91 Coupe
FHB 115.5 N/mm = 659.5 lbs/in
FHA _93.1 N/mm = 531.6 lbs/in
92-95 Coupe
FSK _90.1 N/mm = 514.5 lbs/in
FSS _73.2 N/mm = 418.0 lbs/in
How much has the car been lightened? Have you considered
approaching forum vendors like VB&P, VanSteel or others about a
custom spring with a rate suited for your application?
Switching to coil-overs - more outlay than desired?
.
88-91 Coupe
FHB 115.5 N/mm = 659.5 lbs/in
FHA _93.1 N/mm = 531.6 lbs/in
92-95 Coupe
FSK _90.1 N/mm = 514.5 lbs/in
FSS _73.2 N/mm = 418.0 lbs/in
How much has the car been lightened? Have you considered
approaching forum vendors like VB&P, VanSteel or others about a
custom spring with a rate suited for your application?
Switching to coil-overs - more outlay than desired?
.
Thread Starter
Instructor
Joined: Oct 2002
Posts: 135
Likes: 0
From: Pitman NJ
The series I'm running in Touring Challenge for Corvettes requires that I run under the old Corvette Challenge rules and they state no coil overs. I need to run stock GM parts. Counting my fat *** after a race 3000lbs.
Premium Supporting Vendor
Joined: May 2000
Posts: 4,312
Likes: 70
From: Clearwater FL
I listed the spring rates on all the Hyperco springs we offer.
http://www.vansteel.com/index.cfm?fu...&SubGroup=1950
http://www.vansteel.com/index.cfm?fu...&SubGroup=1950