s928s

I have been trying to get my ride hight down to were i would like it but I am growing very frustrated.

I have a 1982 928S, replaced the origonal shocks and springs , adjustable rears and fixed fronts ( bilsteins ??). With 928 343 055 09 BOGE fronts with the adjustable collars and matching Boge rears ( all red in color ). I also added a set of eibach lowering springs ( yellow mark )

The delema...I have the rear adjusters/springs with the above setup almost completely compressed at the rear. The rear hight is about 1" below the top of the tire rear. Just about where I wan't it but the compresses spring is a very firm ride. The front is totally opposite. The adjuster is all of the way down, aprox 8 full threads remaining. and the front is still high about 2" over the top of the tire tread.

Any help as to a soluton. Is there a different purch. I had the same springs installed on the same car without issues. I was just looking to be able to adjust the front. Am I missing something. Any help wold be greatly appriciated

Thanks in advance, David

G Man

Are you lowering because you don't like the way it looks? At the factory specs the front end will sit pretty high. It doesn't look as cool but that is how it was engineered. I just recently raised my car to factory spec. Before I raised the car the front tires would rub during hard cornering. Using the fender lip measurment I raised mine about 1.5 in.

s928s

The apearence is only secondary. The main concern is with the rear springs compressed all of the way it barly reviels the tire ( aprox 25" to the top of the fender opening.) I would like it a little higher. The front springs are relaxed as far as they can. ( aprox. 27" to the top of the fender lip ) and it still seems very high. Now I have a stiff fully compressed rear and a loose/sloshy front end.

Is there a different spring pearch maybe or a different adjuster that would be needed ?

Ragnar Joensen

Did You replace any other parts than the dampers and springs ?

The red Boges are for the GT and the CS (post the 86.5 design revision of the suspension) and as far as I know the Eibachs are also post the design revision.

I guess You need to replace at least the lower arm, in order to achieve a correct ride height and more so the correct operating properties of the suspension.


Ragnar

GlenL

Do you have measurements from under the car where Porsche wants them done?

Your idea that raising and lowering the car makes the springs stiffer is misplaced. You're not "compressing" the spring with the adjusters. Twisting the adjuster moves it up and down the shock, but the overall height of the spring remains the same. Off the car you'd be shortening/lengthening the spring but, once installed, the weight of the car determines the compression and it remains the same whatever the adjustment.

Have you had an alignment since replacing the shocks? A change in ride height makes significant changes in front toe. You'll really feel that. Did you drop the front lower A-arms? Those won't go back in the same place and that'll mess up caster and camber.

My advice is to set the height, driving it a lot to be sure it's settled, and then get a good alignment. I'd set the front to 150 if you want cool looks and don't mind scraping the spoiler. Up to 170 if you're more interested in avoiding that. The rear can be from 155 to 175 to give the right attitude.

s928s

Could somenoe post the differnce in the front control arms GT/CS compared to the early lower arms.
And can they be added/adapted to an early car?

mark kibort

let me help you. run up the adusters so that the rear fender just is at below tread thickness. (raise the rear about 3 turns to start. take the front all the way down on the adjusters. this will probably give you about 1 finger spacing off the front tire, which is a good look and allows the car to handle right.

Glen is right. you cant "compress" the springs with the adjusters. the car just goes up until you max out the shock travel, which is basically impossible. the springs compress based on the weight on any particular corner of the car.
He is also right about ride hight at about 150mm . maybe 155 to 160 in the rear. this is easily achieved by 1 to 2 fingers of spacing up front off the fender on the tire, and about .5 to 1" below the tire in the rear.

s928s

I have the rear adjusted to the top of the threads and it is as you noted Mark, just to the base of the trtread. The rear I am happy with. The frot is the issue. I have the collar all of the way down except for the last 8 threads holding it on! But i still have 3 finger, aprox 2" over the tier to the fender. I would like it about an inch lower but I am out of adjuster room. This puzzles me because the springs are already shorter?

mark kibort

It doesnt matter if the springs are shorter, it matters what spring rate they are (and then the length matters )

sounds like you can still turn the adjuster 5 turns or so. You can actually work the collar all the way down. it wont come off. it stops at the thread end. If you are at the end, time to get a spring compressor, or something to compress the springs and cut a half coil out. it wont make it much stiffer, but will lower it .5 " or so. a full coil will lower about 1-1.5", but then again, you can raise it up with the adjusters, the way it was MEANT to be operated. somehow, porsche got this one way wrong with springs and adjustement ranges. We have fixed the problem with the coil over replacement kits and cutting springs.

mk

s928s

I guess cutting the front springs and raising it instead of losering it is the way to go. I though there was an easier way, lower pearch or something like that. I guess i has to come apart again to achieve my result.

mark kibort

thats the beauty of this mod. it can be done in your driveway with a die grinder or dremel (if you a lot of cut off wheels and some time)

all you need to do is compress the springs a little to take the tension off of it.

mk

svp928

I may be wrong, but I think there is a difference between 82 and 87+ springs and shocks- I have the Bilstein/Eibach setup on my car, and I have room on the adjusters to go either way. Check with whoever you bought the shocks and springs from to make sure the newer stuff fit the older cars OK..

LT Texan

How far below stock ride height spec are you running? Looks very low.

mark kibort

thats about as low as my car in the rear (probably lower 135mm) and in the front, i would guess 120mm, where im 110mm.

I think the spring purches at the chassis mounts might be different, i dont know. But generally, you use the stock rubber attachments with the new springs and shocks.

mk