VW’s are not exactly what you would consider a road course car. In basic language the large cupped fenders etc tends to trap the air and will cause lift during higher speeds. Also due to aerodonetics if you were going fast in a bug and took your foot off of the gas the car’s natural response is for the a** end to lift upwards. This is even more prononced if running coilovers.
If the rear of your car’s lifting, it could be caused by several factors.
1. Torsion Spring Ride height set to firm or high?
2. Rear Shocks have to much lift? Coilovers?
3. Front to Back Rake?
KYB’s GR’2 Shocks are a good choice. They are Nitrogen Charged, and offer a decent ride. For front Shocks the best ride I found was just the simple non-gas charged shocks, the cheap-o ones work well. I found that these style shocks permit the car’s torsion springs to do the work, while the shocks simply stabilizes the bounce. Again the purpose of most shocks are to stop the car from spring bounce. If you have no suspension springs etc, then you would need more lift from a shock something in the line of a coilover etc. A good way to simply test your suspension is to remove your front shocks. Push downwards on the front a few times and your quickly see that the car gulides up and down. The shocks simply takes the bounce out for a smoother up and down motion. VW did a great job with this invention.
There are several ways to stop the a** end of your VW from lifting at higher speeds. On a drag car they use limiting straps. What they are is a strap that kind of looks like a seat belt you buy it to the length that your car is set to ride. What it does it limit the height that the car can rise, but still permits the car travel downwards when you hit a bump. Some guys will simply use a chunk of chain, “Limiting Straps are mandatory for a race car to pass Tech†I have a set on the Flamed car, next time you see me remind me and I’ll point them out to you.