Hi does anyone happen to know the spring rates on these springs? Not much info out there for these. Not on the manufacturer's websites either strangely enough...

 

I would email Eibach. They should beable to provide the information

 

From what I remember they do not share this information.

 

That is pretty ridiculous. How exactly do they expect people to make an informed decision on purchasing their products without the right information?Anyway I did some searching around and found the specs for the Supra TT ones from here:

http://www.mkiv.com/techarticles/spr...tes/index.html

Have no idea how reliable these specs are though.

Which translates to

Front: 6.6kg/mm -> 9.1kg/mm
Rear: 3.2kg/mm -> 4.7kg/mm

Front: 370 lb/ft -> 510 lb/ft
Rear: 180 lb/ft -> 263 lb/ft

So I would imagine the SC springs to be similar if not softer given the nature and purpose of our vehicles.

 

Position: Front and Rear
Eibach Pro-Kit - 8230.140 - 8230.140 - Eibach Pro-Kit
Lowers Vehicle Front: -1.0 in - Rear: -1.0 in

The Legendary spring company Eibach raises the bar and brings performance and handling to a whole new level. The Eibach Pro kit is the perfect answer for the driver who demands aggressive good looks and high performance handling, without ever compromising safety or ride quality.

The Pro-Kit lowers your vehicles center of gravity, reducing squat during acceleration, body roll in corners and excessive nose-dive under braking.

The Eibach Brand is the leader among Tuners, Nascar F1, WRC and Indy Car racing teams for one reason! “They are the BEST”

The Eibach Pro Kit Advantage:

* DriveWire stocks over 500 Pro Kits and is a Eibach Distributor.
* Precision Tolerances; The Tightest in the Industry
* Ultra-Lightweight, for Reduced Un-Sprung Mass
* Exceptional Block Resistance and Durability
* Lower Center of Gravity
* Progressive Spring Design
* High Performance Handling and Excellent Ride Quality
* Million Mile Warranty

 

we can just put these springs right on our stock struts, correct??

 

correct. though given the age of these cars i'd expect them only to work to the best of their ability with new or refreshed shocks. people typically run them with KYB replacements if yours are out.

 

EXCELLENT. Well timed thread because these are exactly what I was thinking about getting.

And I wanted to replace my shocks anyway.

I'm going to order those and get them put on at the same time as my brakes.

 

Just picked up a set of Pro Kit #8240.001/002 that are for an sc3. Will they work on my sc4 and how much drop can I expect? Thanks.

 

Yes they will work. And they drop the car one inch all around.

 

one inch front and back.or from a four finger gap to two..

 

Thanks for the info. And, thanks to SARU for the springs.

 

Just reached Eibach tech: He said the sc3 springs are incompatible with the sc4. He stated that the springs for the sc4 were engineered totally different.

This is hard to believe. I suspect he's blowing smoke and trying to promote a sale. What to do?

 

The springs are the same. I am sure some of the SC4 guys have bought the same springs.

 

Picked up the car this AM. Springs installed, new urethane bushings on the LCA's and an alignment. Just like everyone (except Eibach!) said. They work fine. Lowered the car an inch all around. Its like a new car, very solid and tight without the clunking. Thanks for all the advice.

I saved the original springs if anyone needs them.