Sorry no one has replied. Most racers are not using sway bars on the front, only the rear. A sway bar attempts to control body roll by pulling the unloaded tire up into the fender. This has the affect of leveling the car out. Not good for racing. The challenge with a fwd car is to eliminate the understeer or push designed in by the original engineers for safety. You control oversteer and understeer by tightening or loosening the front or rear. If you stiff the rear of your vw, you will remove the understeer. Some stiffen the tar out of the rear, I prefer a more neutral car specially on cold tires on the start of a race. Since no one has offered a suggestion, start with 550 pound springs in the front 400 pound springs in the rear. Put a tie rap around the shock struts, the shinny part and set the ride height. Go out and do a couple laps, but stay on the track. This will move the tie raps up, giving you an idea of how much shock compression you are getting. Shoot for an inch and a half. Once you get the hang of driving with your new spring rate, get some additional springs and make big adjustments one end at a time. Drive the car and see how the handling is affected. To a degree, it will be driver preference. Coleman and Carrera sell racing spring sleeve kits fairly cheap to convert your stock shocks into adjustable ride height. Don't lower the car too much. You can move the roll center too low. Lower the car, but try and keep your front control arms level or a little above level. Think of the tire moving up and down through an arc. The other choice would be to contact someone going fast with a VW that sells parts and take their recommendation as a starting point. You can then fart around trying different things. If you watch nascar, when they go up and down on tire pressures, they are in affect changing spring rates. Once you get a car balanced, slight changes can make big differences.
for Bill