Jim bailey - 928 International

Eibach springs front are 399-559 progressive ,rears are 285-372 progressive. I think they work GREAT ,the old very brown 1980 agrees 2002 POC short track class champion 8 events 5 first,3 seconds ...2004 3 events 3 firsts. Yet most of the time it just takes me to work and back.

Chris

So Jim, what shocks do you run with those springs ?

Chris

Tahoe Shark

Jim,
I'm thinking that your driving skill is more responsible for the results than your springs.

SharkSkin

I've heard the Eibachs drop your ride height 1-1.5". Is this true? Do they offer a spring that allows you to run ride height at spec?

rob rossitto

I installed the new progressive eb/bilst combo from 928 SP... old stuff was really soft and worn. so the new setup was a huge improvement... not harsh, but decidedly firmer.... did have to re-set ride ht. - going back to factory spec no problem though... may corner balance it just for fun, but I'm waiting for motor/final wt. specs 1st...

after the poly bushings, it got a tad firmer w/surgical precision... a tad harsh on washboards/dirt roads... just have to go faster to smooth it out during any dukes of hazard imitations..... that was w/the 16" S4 rims/225 tires - haven't tried it yet w/the new 18" stuff, kinda hoping it doesn't get much harsher...

lots of debates on progressive vs linear (what the factory used), and adjustible vs fixed finally decided that for a mostly street car, this was the best compromise for me... in socal - it's datona one minute and rat patrol the next... figured I'd need something versatile since a transformer (928-tank) was not yet an option

Jim bailey - 928 International

My preference is the Bilstein shock , the Koni tends to be harsh on the street in my opinion compression too stiff ? Yet, the standard Koni if the rebound is set too tight the nose can ratchet down under very heavy braking ( DOT race tires) and an un even road surface makes the frame rail hit the track as the shock compresses further and further rebound overcoming compression. Admittedly, the very brown is quite low especially on 225x50x15 tires/rims ..yes 15 . The springs are the key to improving the handling the shocks control the springs. I have never tried the dual adjustable Koni so will not comment on them. Kibort as I believel used the B/E on his first track car and when he went to "racing suspension" gained very little in track performance ..fractions of a second per lap as I recall at Laguna.

SharkSkin

Cool, thx Rob

Earl Gillstrom

Roland and ALL,

Check this thread: https://rennlist.com/forums/showthre...ight=koni+tool

I can't comment on Eibachs but I love the Konis on my '91. Although I don't DE, it seems like the Ideal to be able to adjust them full hard for DEs and then readjust to full soft for the ride home without losening your fillings. With Carl's tool it should take about 15 minutes or less. The cost of making Konis externally adjustable was $140+ EACH the last time I checked. I had Bilsteins on my '88 and found them too stiff for normal driving.

Bill Ball

Yes, I've experienced that even with 155-160MM ride height with the Konis set full hard (rebound), but set medium-firm rebound I still got bottoming as the compression damping was too soft. I busted the front grill supports on one of my jaunts through the twisties with the new Konis.

Jim bailey - 928 International

Thanks Bill for that comment as I wrote it I knew it seemed hard to believe yet that is what I experienced entering a tight slow corner under very hard braking with just a small crown in the track and the car would bottom out. It just dropped lower and lower under hard braking and small bumps. It would do it lap after lap and was not a HARD JOLT but it was hitting.

BC

It may be possible that the Konis would like more spring?