Re: road course racing mk2's? (canadiangolf2.0)
BTDT - twice. If this is your first foray into road racing, I'd strongly suggest that you purchase an existing racecar - while this isn't as fun and exciting as building one from scratch, it saves lots of headaches and is much less expensive in the long-run.
If you're set on spending 2 to 3 times the amount of money, follow the advice that was already provided and get the rules for your sanctioning body. While you're at it, goto some of the races for that sanctioning body so you'll get a flavor for what you're getting ready to do. Be aware that your "baby" will get trashed at some point so the tub has to be a throwaway - in other words, don't build your pristine, 25K mile 16v GTi into a racecar and expect it to survive without a plethora of dents and dings.
My car is setup for SCCA's ITA (Improved Touring) class. That having been said, the only real modifications on the car are suspension - Ground Control coilovers, Konis and camber plates. The brakes are stock with the exception of no backing plates and Hawk Blue pads. Motor mods are tightly restricted - the motor is rebuilt but there are no mods except for a TT race header.
Did it get me where I expected? Yes - the car places squarely in the middle of the pack. Did it get me where I wanted? No - I'd have preferred to win.