J Chen

Does anyone have the exact specs of the springs ,
torsion bar & sway bars of the 968 Club Sport ?


Thanks

Thom

1) 968 CS / 968 Lux without M030 :
a) Springs
- Stiffness : 28 N/mm, constant
- Length : CS 324 mm / Lux 348 mm
- Diameter : 106 mm
- Wire diameter : 11.6 mm
- Color code : CS blue dots / Lux beige dots
b) Torsion bars
- Diameter : 25.5 mm
c) Sway bars :
- Diameter : 26.8 mm front / 16 mm rear

2) 968 CS / 968 Lux with M030 :
a) Springs
- Stiffness : 28 N/mm, variable
- Length : 329 mm
- Diameter : 124 to 110 mm (variable)
- Wire diameter : 11.7 to 12.2 mm (variable)
- Color code : white and yellow dots
b) Torsion bars
- Diameter : 25.5 mm
c) Sway bars :
- Diameter : front 30 mm / rear 19 mm (manual) or 18 mm (tiptronic, Lux only) adjustable

I'm just quoting my own Suspension summary.

To sum it up, the CS standard suspension is merely a Lux standard suspension with shorter springs and set lowered at the rear from the factory.
A CS with M030 will have the exact same suspension specs as a Lux with M030.

J Chen

Thanks Thom

pete95zhn

And where's the M030 rear helper spring??

J Chen

How many lbs/in does 28 N/mm equals ?

pete95zhn

Multiply with 5,709.

Thom

In your a** ! (sorry, that's cheap french humour, but I couldn't resist).

I don't know about the rear helper spring, sorry.

J Chen

Hey Pete, multiplied figure is equal to only
160lbs. Can this be right ?

MTM

I have those on my S2. From what I've heard, the helper springs are about 120 lbs/in and are 60-65% effective at the wheel, so that's like 70 lbs/in.

gregeast

Thom, votre sommaire est tres instructif, merci bien!

MTM

I think that is right, but don't forget that it has really big sway bars.

J Chen

Speaking of which, whose calculation are more accurate ?
Paragon tech article works on 56% while others have
mention 60-65 %. So where do we go from here ?

MTM

I dunno, but you can find some threads on the subject here:

https://rennlist.com/forums/showthre...ht=.65+paragon

https://rennlist.com/forums/showthre...hlight=.65+.56

pete95zhn

That's what PET and FSM claims...it's the balance front to rear that counts in handling,plus additional forces from anti-roll bars.Still the relatively low spring forces can be seen in all pictures taken when our cars are driven fast in corners,body roll is quite massive.Look how a GT3 rolls,or actually it doesn't roll...
With those figures wheel rates front to rear are 25,2 N/mm* and 44,3 N/mm* ,but then there's 30mm and 19mm anti-roll bars equalizing heavily springed rear.
(* 90% eff. )
(** t-bar + 17,5 N/mm helper,65% eff. )



And one source says 100lbs/inch = 17,5 N/mm.If it is 120lbs/inch,the set-up is even more rearward biased.

pete95zhn

I hereby resist my willingness to comment french perversions...