CheshireCat

I've been researching various sway bars on the market and had not read any reviews of this setup. It is a 35mm hollow front 25mm hollow rear bar setup. I don't have any other specs for wall thickness or weight.

I've been looking at the ST solid bar and Strano's 35mm hollow bar as well...

Is anyone using the Eibach set? If so, can you fill in any of the missing information?

Thanks,
Steve

Bud M

Eibach's catalog lists that p/n as 32/21. I found it listed as 35/25 on a couple of websites but it must be incorrect.

Sam Strano

Eibach is indeed 32/21, both solid
LG: 32/21, hollow F.
Addco: 32/22, or 32/25 (DOUBLE YIKES!) both solid
Spohn: 32/22 solid
Hotchkis: 36/25 both hollow
SS/WS6: 32/19 hollow F.
Z28/Formula: 30/19 hollow F.
ST: 35/25 solid
Hellwig: 34/25 solid
Strano: 35/22 both hollow

IMHO 32/21's and 35/25 type setups are too rear-biased, and make cars with any consideration to handling (good tires, better than stock alignments and so on) too prone to oversteer. If one studies spring rates in combination with bar rates on say a REAL '93 1LE (the only one to have a 32/21 factory), they'll find that car had stock rear springs with the 21 rear bar, but stiffer front springs with the 32 as well. The F/R stiffness is more FRONT biased on a '93 1LE (and the later ones that use 32/19 with stiffer front and rear springs) than a set of 32/21 bars with a stock springs.

The front of the car needs help on roll stiffness to better control the camber curve. Also the front carries more weight. The rear is lighter, but also is a solid axle that doesn't gain or lose camber in corners. The result is you don't need to make the rear really stiff to see a significant change in balance.

A 32mm front bar is about 23% stiffer than a Z28's stock 30mm bar. Remember that SS's and WS6's have a 32 stock.

35 front bars are around 45% stiffer than a stock 30mm bar. 31% stiffer than a 32mm bar.

Solid 21/Hollow 22mm rear bars are about 33% stiffer than stock 19's.

25mm rear bars are about 67% stiffer than a stock rear bar.

What you don't want to do make the rear bar much stiffer relative to the front. Remember better control of the camber curve and ANY better alignment (the OEM one is meant to make understeer) is already gaining you big front end grip. If you go 32/21, you are upping the rear bar 10% MORE than the front changed. If you go 35/25, you are stiffening the rear by 22% more you did the front. The result is an oversteer prone car with poor power down abilities out of corners and grip and ride that's more easily upset when one rear wheel hits a bump. More skippy is the easy way to think of it.