Jack Riffle

YEP, I did it several times at SITM, but attributed it to "aggresive driving". Then I got home and realized it was happening here too under less agressive circumstances. If I had the factory chin spoiler on, the car would be at the body shop getting it repaired on a weekly basis... there has to be a better setup......if only I find it!

IcemanG17

I've found that I can bottom out my front end on hard hits on steep bumps....but I'm sitting at 155mm on 20 year old stock suspension...so I guess thats asking alot.....

Ron_H

Bottoming out seems to be a given in this car, but I simply slow or stop at speed bumps, driveway entranceways, etc. After screwing my spoiler upteen times and pissing off another umoteen times, I hope I have learned to anticipate these joyous encounters with the realities of the road. I have stock springs with internally adjustable Konis, and I love the compromise. I can tell you the car's ride and stability are fine with me for all around driving. In an autocross, I could use some more stiffness and less body roll, but I don't do that every day, so who cares. If I get a trophy, I surely don't. Once in another state, I was moving along at a "briisk" pace with about ten miles of empty road visible in front of me, and I encountered a roller coaster section of ups and downs. Whee, said I. Big mistake. One of those ups was a bit higher than the others, with a little bigger down following, and I bottomed the entire suspension. Lucky me though, because nothing was really damaged but some scrapes and scratches. I went on my way loving the sturdiness of my 928 machine.

bwoyat

The bilstein/eibach is not too stiff, but it depends on how you drive. I may actually prefer someting stiffer, but that's just me. Next step is to add the stiffer sway bars and see what it's like. I like to drive hard and will be doing some DE events next month so I'm working on tightening everything up.

Brent
89S4

Bill Ball

The people who are reporting bottoming all have lower than correct ride height.

drnick

the drop links will not stop you bottoming out. i have carls suspension kit, the custom spring perches and collars are well made. im running with 550/350 lb springs front/rear on my 79 with koni internally ajustables - i really like the combo! its definitely too soft for the track but on the road its now a proper sports car. the trade off is that you do now notice all the minor imperfections of the road surface. ive gone from stock setup to the eibach and then two different weight of hypercoil spring with an S2, SE and now the 79. it takes a while to figure out what suits in terms of ride comfort vs handling, if you can take a ride in someone elses car who has changed the suspension this is a help.

my 79 is set at 120mm on the front and it bottoms out in sudden dips at speed or over speed bumps.

Panzer9

BIG TIME- @ 110 mph on a backroad with a sudden dip, I snapped my A/C bracket. Since running th car 20mm lower, & The B&E suspension upgrade- Same road , speed _ no hitting at all- I like the stiff feel alot.- not too "jarring".

Ron_H

Yup, I broke my AC bracket the same way in Nevada on a dip. And I still had to make it to Florida and back in the Summer. Not cool.

Drewster67

Being the track shark is dropped and going off the track on occasion - Yes, Ive bottom out. Although I am fortunate, nothing broke except for the plastic alternator air duct cover.

AO

I assume you're just bottoming out on the one (outside) corner, yes? My front ride height is at 158 last time I measured and I have the B/E setup and I don't seem to have any bottoming out issues. However, I have DR's stiff swarbar and I think that makes a big difference in how the car handles the typical corner dip by transfering a lot of the energy to the inside corner.

Shark Attack

twice so far on my 85 one was in town over a drainage grate and the other was on a bad back road. I think the one on the back road only happened becasue my MM's were bad and the engine was sitting lower than normal it hit the oil pan.

camboinc

Jack,
motor up here and drive my car with the sport suspension for a few hours. then decide what you want to do. i have already shared with you my opinion on 'standard stock' vs 'sport' suspension. just depends on your road conditions i guess. i think you will occasionally bottom out regardless of shock spring combo as a result of the cars generally low stance.
my nickel....

Jack Riffle

Yeah Brian, may take you up on that.....let's see...wife's out of town??? Sept. 13th, was it? I am Going to take Bill Ball's advice before I do anything. Set the ride height properly. Now, call me crazy, but have any of you guys noticed that after you have lifted all four corners of your car ( to take the wheels off to wax them, for instance) And then driven the car for a while, it's like you don't feel a single bump in the road? Until it settles back down of course.

Daniel Dudley

I had an 89 that bottomed out on undulating curves. Not fun, Raised the ride height, but that didn't cure it with the soft springs/shocks. I have to say I really like the bilstein/ eibach combo, although I think the bilsteins are a tad soft on the rebound under certain road conditions. I expect that they work really well with stock springs. You will notice the slight imperfections on the road more, but they soak up the big stuff really well. Much more of a driver's car when running the B/Es.


BTW, the shocks on my 89 passed the bounce test, until I compared it to a B/E combo on another car.

Shocking difference ! Like plug wires, shocks on a 928 become deferred maintenance items due to cost/ complexity issues. You get what you pay for in this case IMO. YMMV

Jack Riffle

Dan, I don't think it's a matter of "you get what you pay for". When it comes to my 928 money isn't an issue. ....hell, doctor said I could go at least another year before that kidney transplant! What I don't want to do is spend a lot of money, and get a ride i DON'T LIKE. Like I said, I like my ride comfort and I don't DE the car. What I DO DO is drive it aggresively occaisionally ESPECIALLY in the twistys and I don't want to have to worry about how much damage I am doing while I am having fun. What isn't fun for me is to feel like I am driving a Conestoga Wagon. If I wanted to do that, I would have bought a Vette!