Front spring with the code FJY ?
Slingshot
Joined: Dec 2001
Posts: 3,817
Likes: 24
From: Charlotte NC
Dan, I'm not sure what year you are inquiring about, but your build sheet should specify what suspension option you have. If you know the option code and the model year, I have a chart with the suspension spring rates if this will help.
Thread Starter
Drifting
Joined: Aug 2000
Posts: 1,758
Likes: 4
From: Medford, Or
Thanks, Does anyone else know? Part number on the spring is 025232. Seems to be missing a number.
Last edited by vettedan; Feb 26, 2011 at 05:21 PM. Reason: fix
Safety Car
Joined: Dec 2006
Posts: 4,290
Likes: 6
From: St Marys GA
EDIT: Not sure why I didn't just search for FJY first. Here ya go!
http://forums.corvetteforum.com/c4-g...-code-fjy.html
Looks like the base spring from 1985, 335 lb/in spring rate.
Before Edit:
Hmm, I can't seem to find anything about an FJY code. Are you sure you didn't misread the printing? Not trying to insult you or anything, but they can be kind of hard to read sometimes. Here are a few resources for years, codes and spring rates, but nothing on FJY.
http://forums.corvetteforum.com/c4-t...-identify.html
http://www.idavette.net/hib/c4/sustunch.pdf
http://forums.corvetteforum.com/c4-t...post1560654737
http://forums.corvetteforum.com/c4-t...ing-codes.html
You can also do a search on "spring codes," there's a lot of info out there. Can be hard to find though.
http://forums.corvetteforum.com/c4-g...-code-fjy.html
Looks like the base spring from 1985, 335 lb/in spring rate.
Before Edit:
Hmm, I can't seem to find anything about an FJY code. Are you sure you didn't misread the printing? Not trying to insult you or anything, but they can be kind of hard to read sometimes. Here are a few resources for years, codes and spring rates, but nothing on FJY.
http://forums.corvetteforum.com/c4-t...-identify.html
http://www.idavette.net/hib/c4/sustunch.pdf
http://forums.corvetteforum.com/c4-t...post1560654737
http://forums.corvetteforum.com/c4-t...ing-codes.html
You can also do a search on "spring codes," there's a lot of info out there. Can be hard to find though.
Last edited by StealthLT4; Feb 26, 2011 at 05:27 PM. Reason: Actually searching...doh
Slingshot
Joined: Dec 2001
Posts: 3,817
Likes: 24
From: Charlotte NC
Okay here you go. I got this information from several OEM C4 build sheets and the C4 suspension profile chart:
1986 & 1987 convertible CNV FE1 and Z52 suspension option:
• FJY - Front Spring Rate (N/mm) = 54.4
• RCA – Rear Spring Rate (N/mm) = 39.9
1986 & 1987 convertible CNV FE1 and Z52 suspension option:
• FJY - Front Spring Rate (N/mm) = 54.4
• RCA – Rear Spring Rate (N/mm) = 39.9
Last edited by pmihaltian; Feb 26, 2011 at 05:31 PM.
Thread Starter
Drifting
Joined: Aug 2000
Posts: 1,758
Likes: 4
From: Medford, Or
Thanks to everyone!!!!
.
Slingshot
Joined: Dec 2001
Posts: 3,817
Likes: 24
From: Charlotte NC
• Z51 - Front Spring Rate (N/mm) = 66.5
• Z51 – Rear Spring Rate (N/mm) = 57.2
Last edited by pmihaltian; Feb 26, 2011 at 06:32 PM.
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Thread Starter
Drifting
Joined: Aug 2000
Posts: 1,758
Likes: 4
From: Medford, Or
Thank you again for everyones help.
Dan
Vetteworks
Slingshot
Joined: Dec 2001
Posts: 3,817
Likes: 24
From: Charlotte NC
EDIT: Not sure why I didn't just search for FJY first. Here ya go!
http://forums.corvetteforum.com/c4-g...-code-fjy.html
Looks like the base spring from 1985, 335 lb/in spring rate.
http://forums.corvetteforum.com/c4-g...-code-fjy.html
Looks like the base spring from 1985, 335 lb/in spring rate.
1985 suspension options:
• Z51 - Front Spring Rate (N/mm) = 63.5
• Z51 – Rear Spring Rate (N/mm) = 57.2
• FE1 - Front Spring Rate (N/mm) = 54.0
• FE1 - Rear Spring Rate (N/mm) = 39.9
Slingshot
Joined: Dec 2001
Posts: 3,817
Likes: 24
From: Charlotte NC
On an 86 roadster or a Z52 optioned 87 roadster, that translated into approximately 2 turns lock to lock. I am not sure about the steering geometry on a C3 68 chassis and if the lock to lock turns would be the same. Check it out and see what you discover.
Thread Starter
Drifting
Joined: Aug 2000
Posts: 1,758
Likes: 4
From: Medford, Or
The 1986 & 1987 roadsters did not come with Z51 suspension. They came with Z52 suspension. The Z52 option came with 13:1 quick ratio steering. All 1986 roadsters came with this quick steering. However, in 1987 only roadsters with the Z52 option came with quick steering. All other '87 roadsters came with standard steering ratio (approx 2.75 - 3.0 turns lock to lock)
On an 86 roadster or a Z52 optioned 87 roadster, that translated into approximately 2 turns lock to lock. I am not sure about the steering geometry on a C3 68 chassis and if the lock to lock turns would be the same. Check it out and see what you discover.
On an 86 roadster or a Z52 optioned 87 roadster, that translated into approximately 2 turns lock to lock. I am not sure about the steering geometry on a C3 68 chassis and if the lock to lock turns would be the same. Check it out and see what you discover.
Thank you pmihaltian, you have been a big help.
Got this off Road & Track magazine reveiw of the 87.
"There's a choice of coupe or convertible bodies, and the transmission comes as a 4-speed automatic or a 4-speed manual shift, with the automatic locking into top for economy and the stick having overdrive on the top three of the four, controlled by a button atop the shift lever. A new, major option for 1987 is the Z52 sport handling package, which consists of Bilstein (stiffer) shock absorbers, quicker steering, wider (9-1/2 in. from 8-1/2 in.) wheels and, for the automatic, a 3.07:1 rear axle (which you get anyway with the stick shift) replacing the economy gearing of 2.59:1. "
Car n Driver:
http://www.caranddriver.com/features...ations-feature
Last edited by vettedan; Feb 26, 2011 at 06:16 PM.
Slingshot
Joined: Dec 2001
Posts: 3,817
Likes: 24
From: Charlotte NC
Okay, that means that the suspension & steering you have is either from a 1986 Indy 500 Pace Car roadster or a 1987 Corvette convertible with a Z52 option. Are the shocks yellow Bilsteins or Black Delco's ? Yellow would be 1987 & black would be 1986.
Thread Starter
Drifting
Joined: Aug 2000
Posts: 1,758
Likes: 4
From: Medford, Or
I think it's out of a 86 or 87 with Z52. Sounds like the spring rate is the same as the base FE1 spring model . The steering radius in much better. Can't tell what the shocks were, it currently has KYB shocks with 2 piece Enkei wheels.
Team Owner
Joined: Dec 1999
Posts: 34,873
Likes: 487
From: Lacey WA RVN 68-69
NCM Sinkhole Donor
The 1986 & 1987 roadsters did not come with Z51 suspension. They came with Z52 suspension. The Z52 option came with 13:1 quick ratio steering. All 1986 roadsters came with this quick steering. However, in 1987 only roadsters with the Z52 option came with quick steering. All other '87 roadsters came with standard steering ratio (approx 2.75 - 3.0 turns lock to lock)
On an 86 roadster or a Z52 optioned 87 roadster, that translated into approximately 2 turns lock to lock. I am not sure about the steering geometry on a C3 68 chassis and if the lock to lock turns would be the same. Check it out and see what you discover.
On an 86 roadster or a Z52 optioned 87 roadster, that translated into approximately 2 turns lock to lock. I am not sure about the steering geometry on a C3 68 chassis and if the lock to lock turns would be the same. Check it out and see what you discover.
Dan-- the front spring on my 87 is a HMP and the rear is a NYR. The build sheet I have matches the labels on the springs.
Slingshot
Joined: Dec 2001
Posts: 3,817
Likes: 24
From: Charlotte NC
Slingshot
Joined: Dec 2001
Posts: 3,817
Likes: 24
From: Charlotte NC
My 87 coupe with Z52 has the quick steering. Z52 was not offered in 86, only 87 and 88. When I replaced the rack last year, I checked to make sure I was installing the correct reman quick steering rack and the steering wheel turns lock-to-lock were the same. The rack I removed was the original.
Dan-- the front spring on my 87 is a HMP and the rear is a NYR. The build sheet I have matches the labels on the springs.
Dan-- the front spring on my 87 is a HMP and the rear is a NYR. The build sheet I have matches the labels on the springs.
Thread Starter
Drifting
Joined: Aug 2000
Posts: 1,758
Likes: 4
From: Medford, Or
My 87 coupe with Z52 has the quick steering. When I replaced the rack last year, I checked to make sure I was installing the correct reman quick steering rack and the steering wheel turns lock-to-lock were the same. The rack I removed was the original.
Dan-- the front spring on my 87 is a HMP and the rear is a NYR. The build sheet I have matches the labels on the springs.
Dan-- the front spring on my 87 is a HMP and the rear is a NYR. The build sheet I have matches the labels on the springs.
I going to put this front suspension on my '84. The knuckles can handle bigger brakes. I'll still need to lower vette and get stiffer suspension. I dumpped 200 LBS of the front with the LS1. I'm installing a 2006 T56 in my 84 now. I blew up the 4L60e, too much HP. The LS1 is a monster. See you at the track!!!!
Thread Starter
Drifting
Joined: Aug 2000
Posts: 1,758
Likes: 4
From: Medford, Or