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Stiffer stock springs by pontiacfierokid1985
Started on: 01-03-2021 04:07 AM
Replies: 6 (126 views)
Last post by: Raydar on 01-15-2021 04:23 PM
pontiacfierokid1985
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Report this Post01-03-2021 04:07 AM Click Here to See the Profile for pontiacfierokid1985Click Here to visit pontiacfierokid1985's HomePageClick Here to Email pontiacfierokid1985Send a Private Message to pontiacfierokid1985Edit/Delete MessageReply w/QuoteDirect Link to This Post
Does anyone have stiffer stock springs for the rear 84-87 suspension for sale? If so comment or pm me
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liv4God
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Report this Post01-11-2021 01:13 PM Click Here to See the Profile for liv4GodSend a Private Message to liv4GodEdit/Delete MessageReply w/QuoteDirect Link to This Post
I have a set of Stock rear springs from and 86 coupe, but I don't know how stiff they are. I'll include the rpo code data in case anyone can get the stiffness from that.

According to the rpo codes:
F41 - suspension, heavy duty, front and rear
Y99 - rally suspension package
8WY - left rear spring
9WY - right rear spring
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skywurz
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Report this Post01-11-2021 01:43 PM Click Here to See the Profile for skywurzClick Here to visit skywurz's HomePageSend a Private Message to skywurzEdit/Delete MessageReply w/QuoteDirect Link to This Post
I have a set of NYM code springs
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pontiacfierokid1985
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Report this Post01-13-2021 02:54 PM Click Here to See the Profile for pontiacfierokid1985Click Here to visit pontiacfierokid1985's HomePageClick Here to Email pontiacfierokid1985Send a Private Message to pontiacfierokid1985Edit/Delete MessageReply w/QuoteDirect Link to This Post
Idk any of those codes or the spring weights for them. All I know is I installed a 3800sc and that weighs a bit more then a 2.8. When going into a corner the back of the car squats down a **** ton going into the corner
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liv4God
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Report this Post01-14-2021 03:07 AM Click Here to See the Profile for liv4GodSend a Private Message to liv4GodEdit/Delete MessageReply w/QuoteDirect Link to This Post
I don't know what the codes mean in terms of spring stiffness either. I was hoping someone else who does know would chime in.
Are you opposed to going to coil overs? That's what I did on my swap and on my stock V6 as well for that matter.
Then you can pick exactly the spring weight that you want for your setup.
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skywurz
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Report this Post01-14-2021 07:47 PM Click Here to See the Profile for skywurzClick Here to visit skywurz's HomePageSend a Private Message to skywurzEdit/Delete MessageReply w/QuoteDirect Link to This Post
There are no known actual spring rates documented.

REAR SPRINGS:
(EXC WS6) CODE (W/WS6) CODE
-------------------------------
1984 10029092 NWY (Stiffest)
10029091 NWX |
10029090 NWW (Softest)

1985-87 10030180 NXD 10034976 NYM (Stiffest)
10029092 NWY 10034975 NYL |
10029091 NWX 10034974 NYK |
10029090 NWW 10034973 NYJ (Softest)

from http://www.calgaryfieros.com/OSGdocs/springs.html
so when you say stiffer you are going to figure out where you are at and find your current code. If you search around theres a post on how to decode them from the fender tag instead of hoping the tag is still on the springs.

[This message has been edited by skywurz (edited 01-14-2021).]

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Raydar
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Report this Post01-15-2021 04:23 PM Click Here to See the Profile for RaydarClick Here to Email RaydarSend a Private Message to RaydarEdit/Delete MessageReply w/QuoteDirect Link to This Post
If you really want stiffer springs, you ought to look into Fieroguru's coilover kit. Based upon your setup, he can even make recommendations regarding spring rate, etc.

https://fieroguruperformance.com/?page_id=267
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