My race only AE86 weighs 1715lbs,it's pretty hard to get to that weight.Car is currently competely stripped inside with only a drivers seat,4 gallon fuel cell and a 6 point cage.The doors are kevlar as is the rear hatch and a 1pc lift off front end,I built all the moulds and parts myself.The rear quarters and roof are next,should drop a few pounds as I will cut all metal off from the top of the windsheild down to the bottom of the rear glass.
All bumpers and supports are removed as well,no ps etc etc either.I have a rather heavy engine being that I've supercharged a 20v.With the roof/rear quarters removed and replaced with the kevlar pieces and going back to an NA engine combo I would very easily be in the low 1600lb range.
If you want one this light be prepared to spend lots of cash,do lots of work and never ever be street legal again.