I race at 1988 GTI in GTS Challenge. Having raced Datsun Z cars and E30 BMWs for the last 10 years, I am somewhat ignorant about FWD racing. I had good success with spooled/locked diffs in RWD cars, but I'm not sure what to do with the GTI. Is anyone running a locked diff in their FWD racecar? What are the pros and cons? My car put 155 HP to the wheels, and weighs in at 2150 with me in the car.