Ceterforce clutch,how many removed overspring?

I have them in two cars and set up both ways. With the spring in it is a little harder and I have a problem with the clutch pedal sticking to the floor. The centerforce guy said I needed to remove the spring because it over power the clutch at high rpm. The car with the spring removed works easliy biyt I have not driven the car since it's still in resto mode. I think I would just remove it.