If you need to run 11mm of ride height to get your car to work something is not right unless you running offroad with your touring car to need that much ride height. The bumpiest track I ever ran on we ran 7mm of ride height and then another 4mm of droop so the suspension had extra travel to go up and down for the bumps but still didn't have 11mm ride height. We had 11mm of total height but when setting in race height it was only 7mm.
Most normal track I run on we use 5mm of standard ride height.