My own car Small Turbo, fitted Koni's and Rondell's with 225/40 tyres 4 years ago and had no problems. However a friend at the same time who fitted his with 235/40 tyres did have to mod his front Koni's.

I would try first and see what gap you have with the tyres you are going to use as in my experiance tyre profile did make a difference.