ZDOG

iTrader: (13)

do you know if they are the same ride height as stock? also how much stiffer are they than stock z28 springs? or the front 2 sufficient or should they be at all 4 corners? thanks!
ps. any part #'s

ross

Here is the data streight off of GM's Chassis Tunning Chart for the 1998 models (Don't ask how I got it)

FE2 Solid Roof and T-Top (Z28):
Ft: 51 N/mm (291 lbf/in) Streight Rate
RR: 19.9 N/mm (113 lbf/in) Streight Rate

FE2 Conv (Z28 Vert), FE4 Conv (SS Vert), B4C Police Package, FE4 Coup, (SS), FE7 Showroom Stock Pkg (1 LE)
Ft: 63 N/mm (342 lbf/in) Streight Rate
RR: 20-30 N/mm (114-171 lbf/in) progressive rate

The ride height is the same for all cars.

Eibach Springs, Pro Kit:
FT: 377-600 lbf/in progressive rate
RR: 94-160 lbf/in progressive rate

The Pro kit will lower the car about 1.5 inches

ZDOG

iTrader: (13)

thanks, anyone got part numbers?

ross

Check out this link:

http://www.1le.net/docs/1le_specific_parts.html

(2) Front springs (LS1, 360 lbs/in): 22132887
(2) Rear springs (LS1, 130-170 lbs/in): 22132889

He has different spring rates, but I got my a very reliable source inside of GM who lets just say, had very close ties to the F-Bodies.

ZDOG

iTrader: (13)

thanks, only problem im having is if those are gm part numbers they yeild no results on any gm parts catalog's? ill call my local dealer and find out what the the numbers are for 98 ss with suspension package. thanks for the info.

Kenafin_02TA

If you're referring to the 1le suspension components that SLP put on some Firehawks and SS's...they will drop the height about 3/4". I don't know how they compare to a Z28 stock setup...but they are much stiffer than a stock WS6 setup.

You wouldn't think 3/4" would make much of a difference...but it does...more speed bumps get scraped...opening the car door when it's on a trailor isn't always possible.

ross

I am glad I could help, let me know how it turns out.

ZigZagZ

Would the installation of 1LE springs, on a stock Z28, require 1LE upper and lower control arms? Is the geometry of the 1LE control arms different than the Z28 control arms, or is it simply a matter of different bushings?

Any input would be greatly appreciated.

ross

The difference is just a matter of bushings. The geometry is idential.

ZigZagZ

Thanks Ross

ross

No Problem

98_1LE

iTrader: (17)

GM no longer stocks 1LE springs. SLP may still have them. I have been told that if you order the 1LE part number, they send a "replacement" part which is the base Z28 spring.

ZigZagZ

That sucks.