Transverse leaf spring question

[secondchance]

Are early (90-92?) and later (93-95) leaf spring rates the same and interchangeable?
I am dropping the car height a bit so I picked up a front spring from another WAZOO member and glued on the wedges. However, Phil noticed end plates (both ends where it sits above the lower A arms) are a bit diffrent from the later cars.
So 2 questions - any rate difference? Will the ends work with a 94?

Thanks.

[mike100]

There's a spring rate chart out there in cyberspace somewhere that lists the spring(s) for each year. What color is the little square on the top of the spring? blue-ish green? There were 3 different color codes for the coupe, vert, and zr-1 for the early cars and is referenced in the manual. I would have to look at the 95 manual i also own, but I'm thinking it is the same.

[Scrrem]

Here's one chart I found on spring rates...

http://www.wedophones.com/Manuals/Ch...ng%20Chart.pdf

Rich

[secondchance]

Originally Posted by Scrrem

Here's one chart I found on spring rates...

http://www.wedophones.com/Manuals/Ch...ng%20Chart.pdf

Rich

Thanks Rich.

[secondchance]

Originally Posted by mike100

There's a spring rate chart out there in cyberspace somewhere that lists the spring(s) for each year. What color is the little square on the top of the spring? blue-ish green? There were 3 different color codes for the coupe, vert, and zr-1 for the early cars and is referenced in the manual. I would have to look at the 95 manual i also own, but I'm thinking it is the same.

I'm positive 91 came from a 91 Z. I'll check the color code when I get home later.

[secondchance]

Good thing I checked this.
91 sping for ZR-1 is 96.2 N/mm (548 lbs/inch) -front and 39.9 N/mm (228 lbs/inch) - rear.
92 and later are 75.4 (430 lbs/inch) and 33 (188 lbs/inch) respectively.

I'm gonna have to remove my front, shave off the factory bumpers and reglue lowering wedges.

[WVZR-1]

Originally Posted by secondchance

Are early (90-92?) and later (93-95) leaf spring rates the same and interchangeable?
I am dropping the car height a bit so I picked up a front spring from another WAZOO member and glued on the wedges. However, Phil noticed end plates (both ends where it sits above the lower A arms) are a bit diffrent from the later cars.
So 2 questions - any rate difference? Will the ends work with a 94?

Thanks.

The springs are assembled differently on the control-arm ends. Your springs should have had a 1 1/4" square pedestal so to speak rather than just the rubber molded insulator like the '91 that you purchased.

You should have no issues. If the heights are different in the FSM then there will be differences.

Forgot I have a '94 FSM so:

I checked a '91 FSM and a '94 FSM and the datum line measurements are different with the '91 being less. I checked the reference for C height. Now the image is a bit different but certainly the point isn't. Look at 10-3-2 or 3 in your FSM and look at the datum heights. A '91 @ C is 177mm and a '94 @ C is 192mm. That's pretty close to the difference in the spring height for the two. You might end up a little lower than you intended!

Originally Posted by secondchance

Good thing I checked this.
91 sping for ZR-1 is 96.2 N/mm (548 lbs/inch) -front and 39.9 N/mm (228 lbs/inch) - rear.
92 and later are 75.4 (430 lbs/inch) and 33 (188 lbs/inch) respectively.

I'm gonna have to remove my front, shave off the factory bumpers and reglue lowering wedges.

I would be tempted to use the '91 if time and the aggravation doesn't bother you should you need to redo the procedure later. I'd think the increased spring rate maybe a +.

[secondchance]

Originally Posted by WVZR-1

The springs are assembled differently on the control-arm ends but carry the same codes. Your springs should have had a 1 1/4" square pedestal so to speak rather than just the rubber molded insulator like the '91 that you purchased.

You should have no issues. If the heights are different in the FSM then there will be differences.

Forgot I have a '94 FSM so:

I checked a '91 FSM and a '94 FSM and the datum line measurements are different with the '91 being less. I checked the reference for C height. Now the image is a bit different but certainly the point isn't. Look at 10-3-2 or 3 in your FSM and look at the datum heights. A '91 @ C is 177mm and a '94 @ C is 192mm. That's pretty close to the difference in the spring height for the two. You might end up a little lower than you intended!

Hi, David,

Looks like I need to rework my spring. Rates are different between 91s and 92+ cars.

[Scrrem]

If you looking to sell that spring, I'd be in the market
Rich

[WVZR-1]

Originally Posted by secondchance

Hi, David,

Looks like I need to rework my spring. Rates are different between 91s and 92+ cars.

Like I added to my other post. I believe the spring rate could be a +!