1 is for funerals. 2 is for weddings. 3 is for hooligans. 4 is for the Bonneville salt flats. I run 3 with stock WRX springs! Over damped but I know where the wheels are (granted sometimes the answer is "in the air").
And whoever put the adjuster on the top in the rear should be chemically castrated. Idiot.
I used one for pregnant woman chauffeur (or one in the front, two in the rear.. giggity). I rarely used 2 all around.. I kept them set on #3 probably 95% of the time. #4 I would use occasionally if I was planning on going for a "fun" drive on roads that were nice and smooth with back to back corners.
Ohh.. and those rear adjusters, seriously. Someone wasn't using their brain on that one.
After I upgraded to overly stiff swaybars, which I also prefer, I never felt the need to use the #4 setting anymore. Whiteline 24mm adjustable front & rear bars.. front set on the stiffest setting, rear on the middle. Front on the stiff setting virtually eliminated any dead zone in the steering and made the car VERY responsive to steering input.. middle setting in the rear was stiff enough to make it break traction earlier, which eliminated the car's inherent understeer. At first having the car neutral in a slide was a bit of a scary feeling. With all four tires breaking lose simultaneously the car would push to the outside of a corner while maintaining it's trajectory. It leaves much less room error. If you follow your instincts to brake and slow down, instead of turning in as it would with understeer, the increased grip up front would kick the rear out and suddenly you're now in an oversteer situation where it's easy to over correct. If you don't know how the car is going to react, and you don't keep your wits, you'll wind up with the rear of the car in front of you, pointed towards the outside of the corner. The positive aspect about it is that when the car remains flat through the corner, it doesn't snap back when the weight is transferred.. it's super predictable, and with subtle inputs the car becomes very easy to control in a slide. I doubt I could maintain the same speed through a corner as I would with the swaybars set softer, but it's more fun. :drive2: