Bilstein PSS10 settings

AndyBeech

Senior member
 Wiltshire
Just a quick question for anyone running PSS10’s....what settings do you run for both road and track?
Currently got 4 on the dial all round on the road but wondering what anyone else uses as a baseline setup out of interest...
 
I have them at 2 or 3 for the road (but might go to 4 or 5 when I'm out for a hoon), and then crank them up to 8 when I get to a track...and take them to 10 once I'm comfortable with the track conditions.

I also have Eibach ARBs, strut brace, lighter seats (to offset the fat-bastard driver), 12mm front spacers and run original 224Ms - so my setup might work slightly different to your's.
 
I have AC Schnitzer Racing adjustable suspension which is made by Bilstein to ACS specs and similar to the PSS10s and basically agree with mmm-five's settings. I like the suspension to be very soft and compliant for the roads but very firm on track. The soft settings don't make the car roll-poly, they just considerably reduce the speed of bump and rebound movements and prevent the suspension from being uncomfortable and jarring on our badly surfaced roads. The spring rates on PSS10 are considerably more balanced (front to rear) than the OEM suspension so whatever setting you have the dampers you don't get the squat on acceleration and the pitching under braking. :thumbsup:
 
Cheers chaps I’ll keep those in mind.

On another note, it feels a bit more ‘floaty’ than it previously did round corners, maybe that’s not the right word but maybe more like it’s following the road a bit more than it used to. I guess this might be a characteristic of having a new setup and having more feeling than the OEM setup which was 90k miles old!

Every bush has been replaced with OEM or Powerflex including RTAB with limiters so not concerned it’s anything that’s worn, possibly a geo issue? Went for a baseline CSL setup to start with but guessing it’ll need a proper alignment in a month or so when it’s settled, possibly could be causing it!

Or maybe it’s just how the car is supposed to handle and I need to get un-used to driving on crappy worn OEM stuff!

Here was my geo, that all seems ok to me...

49897757673_f2d748d8ce_b.jpgGeo by A W, on Flickr
 
Your geometry looks about ideal.

I think your feeling of "floatiness" might be down to the fact that with stiffer front suspension, the outside front wheel isn't being loaded as much on the entry to a corner, with the resultant effect that there's less bodyroll than you've been used to.

You say: "more like it’s following the road a bit more than it used to", which sounds to me as though you're noticing improved "turn-in" and less understeer because the inside front wheel is now getting more grip on the corners.

I hated the OEM suspension and ditched it when I bought my car with around 25k miles, because the front end lifts on acceleration and the steering is very imprecise with severe pitching under braking.
 
exdos said:
Your geometry looks about ideal.

I think your feeling of "floatiness" might be down to the fact that with stiffer front suspension, the outside front wheel isn't being loaded as much on the entry to a corner, with the resultant effect that there's less bodyroll than you've been used to.

You say: "more like it’s following the road a bit more than it used to", which sounds to me as though you're noticing improved "turn-in" and less understeer because the inside front wheel is now getting more grip on the corners.

I hated the OEM suspension and ditched it when I bought my car with around 25k miles, because the front end lifts on acceleration and the steering is very imprecise with severe pitching under braking.

That sounds about right, and it does drive well no doubt, just feels different which I guess is to be expected!

I do wonder if I'm a bit low with the ride height on the rear and possibly front though, I think we went to max adjustment on the rear as I wanted to keep ride height about the same as the H&R springs I had previous but I'm thinking might need to lift it a bit, don't really want to be outside the adjustment range as given in the manual incase riding on the bump stops...
 
Reading what you said about the floaty feeling reminded me of this post by franzino who also fitted pss10.

There is one thing that I noticed when driving the car; the turn in feel, feels slower and less aggressive then before. In my opinion the car turn in feel was sharper and a bit more aggressive with OEM dampers and Eibach spring. The steering feel was also more enjoyable. Very strange…? I would think that with the harder dampers the turn in would be also a little bit more direct. The dealer and I were thinking about the alignment, but my car never had an aggressive alignment before and was always set-up pretty standard. Besides fitting the Bilstein suspension and the RTAB limiters (with new rubbers) nothing was changed about the car. I also noticed that my TC light flashes more then before fitting the PSS-10… I would think that with a harder suspension there would be more grip and the TC would intervene less.

I wonder if the initial rate of the springs, or perhaps the low speed compression, is actually softer than the original setup.

I guess that’s the problem with suspension. Everything is a compromise and everything is interlinked.
 
AndyBeech said:
I do wonder if I'm a bit low with the ride height on the rear and possibly front though, I think we went to max adjustment on the rear as I wanted to keep ride height about the same as the H&R springs I had previous but I'm thinking might need to lift it a bit, don't really want to be outside the adjustment range as given in the manual incase riding on the bump stops...

You want to adjust the ride height so that there is some "rake" along the car, where the floor at the rear is slightly higher than at the front. Think Red Bull F1 cars.
 
Interested to hear how you're getting on with these, Andy.

beanie said:
I wonder if the initial rate of the springs, or perhaps the low speed compression, is actually softer than the original setup.

Perhaps, but I would have assumed the OEM springs would have had more of a progressive stiffness profile, i.e. more biased towards secondary ride that aftermarket springs. Maybe not.
 
exdos said:
AndyBeech said:
I do wonder if I'm a bit low with the ride height on the rear and possibly front though, I think we went to max adjustment on the rear as I wanted to keep ride height about the same as the H&R springs I had previous but I'm thinking might need to lift it a bit, don't really want to be outside the adjustment range as given in the manual incase riding on the bump stops...

You want to adjust the ride height so that there is some "rake" along the car, where the floor at the rear is slightly higher than at the front. Think Red Bull F1 cars.

Will give this a go next week, deffo needs raising a touch regardless. Is it easy to adjust, can't find much on the net about it...Is it as easy as wheels off and enough access to adjust or does more stuff need to come off first? Thinking the rears specifically could be more difficult.

MrPT said:
Interested to hear how you're getting on with these, Andy.

I will write up a full post on the work I had done and my feelings on it once I've had more of a chance to drive it, only been out twice so far fairly briefly. Pretty extensive refresh though and initial thoughts are very positive but will go into it further maybe next week.
 
Check your tyre pressures, they'll be much more noticeable with the new suspension. If they are too hard it can give the feeling you describe :thumbsup:
 
RedUn said:
Check your tyre pressures, they'll be much more noticeable with the new suspension. If they are too hard it can give the feeling you describe :thumbsup:

Funnily enough I forgot to take the air out from winter storage when they were at 41psi and it obviously felt horrendous until I realised. Very floaty! Got them at 33psi rear and 31psi front at the mo, 19" CSL wheels. Maybe still a touch too high? Any suggestions?
 
AndyBeech said:
RedUn said:
Check your tyre pressures, they'll be much more noticeable with the new suspension. If they are too hard it can give the feeling you describe :thumbsup:

Funnily enough I forgot to take the air out from winter storage when they were at 41psi and it obviously felt horrendous until I realised. Very floaty! Got them at 33psi rear and 31psi front at the mo, 19" CSL wheels. Maybe still a touch too high? Any suggestions?

I haven't run any lower than that on mine, but it can still be a bit floaty at the rear at times. But I put that down to the Supersports needing some temperature more than psi! That's the psi I also found most people are running on M3s with CSL wheels.
 
AndyBeech said:
Will give this a go next week, deffo needs raising a touch regardless. Is it easy to adjust, can't find much on the net about it...Is it as easy as wheels off and enough access to adjust or does more stuff need to come off first? Thinking the rears specifically could be more difficult.
You should have threaded bodies on the front shock, and a couple of c/g-spanners to lock into the rings to loosen/tighten. Make sure you keep track of number of turns.

The rears are adjusted by the spring perch, so you may have to disconnect the rear damper to let the wheel drop enough to get the spring & adjustable perch out...again keeping close track of how much adjustment you've made to you do the same on both sides.

You may need to get the alignment checked once you've adjusted the ride height though - so may be simpler getting the ride height & geometry done at the same place at the same time.

Your kit would have looked soemthing like this...notice the fronts are coilovers, the rears are separate springs & dampers.
596316_x800.jpg

The spanners are in the bottom of the photo, and the rear height-adjustable perches are th elittle silver & black things in front of the blue rear springs.
 
Just to add one minor but important point: when adjusting the rear height, the actual position of the spring tails at the top has an effect on the height.
 
exdos said:
Just to add one minor but important point: when adjusting the rear height, the actual position of the spring tails at the top has an effect on the height.
This is the reason I don't touch this stuff myself :P
 
Appreciate all the advice so far. Having forked out for a decent set up I've decided I may as well get it properly set up and go in for corner weighting on Wednesday. So will report back from there :thumbsup:
 
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