Ive got a GAZ coilover set and that is the only set that will drop a 16 valver more than 60mm. I could even put it with its bumper on the ground.
The problem with going any lower than about 100 mm is that the driveshafts will rub against the chassis and thats the exact problem I had.
When I just got the coilovers I put it down so much that the tyres were rubbing inside the wheelcasing even when driving straight.
It drove like sh*t, and that was because the ground clearance at the front was just 3-4 cm.
Here a picture of how it is now, the back was almost 2 cm lower, but that was a disaster at every bump in the road, because the rear axel banged against the chassis. Its on 16" wheels by the way with 195/40/16 tyres.
http://groups.msn.com/_Secure/0RQAAAKgV6wnObHk3DD4qUDnDY5tK68U*1zdK!XWiw*d0UXKWJCuPBijeMUhz3lKGOXbDa*Z0WloJBRptzvvIdXQ1s4UuFBihJ7qIxtK7hAk/auto_meern">