KW 3 spring rates?
- Thread starter JarmoL
- Start date
Rich Sandor
New member
ARB's??? I'm assuming you speak of some sort of bushings, but that wouldn't really have any affect on body roll so much as squirm.
Hi there,
I'd think 90 Nm is very soft for the rear without torsion bars in place?
I ended up getting H&R/ Bilstein set up for my car. Fronts are 70 Nm and rears 150 Nm. I will update the fronts to 90 or 100 Nm as it's a bit oversteery with the current set up. Surprisingly rear feels somewhat soft as it is even if the springs are so stiff. I need to have the shocks tested to be sure they are working as they should.
Jarmo
Patrick,
That's a H&R Nurburgring set up they sell. I haven't specced those springrates myself. Like I said it's a bit towards oversteer even with the rear ARB (968 M030) at it's softest setting but it's not that bad. I have driven at speed around various race tracks and German autobahns and I am still alive.[
]
The point in my earlier post was that a 90 Nm rear spring is too soft without torsion bars in place. When you consider the actual wheelrates it's quite obvious that 80 Nm front will not match 90 Nm rear all that well?
Jarmo
That's a H&R Nurburgring set up they sell. I haven't specced those springrates myself. Like I said it's a bit towards oversteer even with the rear ARB (968 M030) at it's softest setting but it's not that bad. I have driven at speed around various race tracks and German autobahns and I am still alive.[
]The point in my earlier post was that a 90 Nm rear spring is too soft without torsion bars in place. When you consider the actual wheelrates it's quite obvious that 80 Nm front will not match 90 Nm rear all that well?
Jarmo
Rich Sandor
New member
Patrick, FYI, you must multiply the COIL spring rate by 0.562 to get the EFFECTIVE rear spring rate on a 924/944/968, as per: http://www.tech-session.com/kb/index.php?article=39
So: "Fronts are 70 Nm and rears 150 Nm"
70Nm x 5.588 = 391.16lbs
150Nm x 5.588 = 838.2lbs x 0.562 = 471lbs
(no surprise he's complaining of oversteer there..)
I don't think there is any published correction for front spring rate, although if you add more negative camber to the front, the effective spring rate gets reduced in a straight line but increases in the corners.
So: "Fronts are 70 Nm and rears 150 Nm"
70Nm x 5.588 = 391.16lbs
150Nm x 5.588 = 838.2lbs x 0.562 = 471lbs
(no surprise he's complaining of oversteer there..)
I don't think there is any published correction for front spring rate, although if you add more negative camber to the front, the effective spring rate gets reduced in a straight line but increases in the corners.
Rich Sandor
New member
Basically I would need 900lbs springs to get an effective rate of 90Nm in the back.
Posts made and opinions expressed are those of the individual forum members
Use of the Forum is subject to the Terms and Conditions
