The droop setting has a lot to do with traction which has a lot to do with tire and insert as well as air gap, not only surface.
There are no set rules here.
Just one general principle. The more grip you have, the less you need droop.
That being said, most people like a "point and shoot" car (handling very quick and twitchy, flat through the corners) others (like me) like a "soft" car that leans into the corner. The latter may seem slower, but that's not always the case. While a stiff car will have to use a lot of brake and acceleration, a softer car will flow nicer through the corners and be more forgiving. A track where the winner is decided by a tenth of a second or less may discourage people to use a less forgiving setup and reward a softer car that doesn't suffer too much in the event of an error or a crash. Other than that, it's down to preference and style.
At my track (about 12 second lap, twisty, carpet, rubber tires, low traction), the "softer" cars are faster in any class. A stiff car is always on the verge of drifting and some do it quite often. You can use this to your advantage to some extent (to spin the back end around) but if you don't hit the throttle at the right moment (for whatever reason), you lose time and it adds up. Softer cars on the other hand can come at full speed and just coast nicely with no brake at all in the corner and back on the throttle before the apex, whereas the stiff cars have to go past the apex before they can gun it. A lot of times I pass people on the inside because I can choose much more accurately my line and can go a lot tighter into the corner than they can and I am out of the corner sooner, flat out. In other words they approach the corner fast and get out slower, I come in slower and get out a lot quicker.
All this is possible because I run a lot of ride height (about 7mm as opposed to 5.5 the minimum allowed), and a lot of droop (about 3mm) with soft springs and shocks. This basically allows my car to keep traction even in tripod mode (one wheel off the ground) so I can go really fast around and especially out of corners. Tires are very good too (MM sweeps 24), the car is perfectly balanced left to right and has a rear weight bias but only because I have the back lower than the front by a fraction (perhaps 0.5mm). Otherwise, the car is perfectly balanced 50-50 front to rear.
Of course, this may not work elsewhere or for another driver.
My suggestion is that you look around, talk to people, read as much as you can, but develop your own style and setup. That's what I always do anyway.
Team Greasy Weasel
The best upgrade to any car is some driver skill.
Last edited by niznai; 06-18-2009 at 12:38 AM.