Hi, I hawe a sl 300 1991year. And I have the default stuff in my car, thats 231 HP. But I think if I shall done Chiptuning then how much Hp will it be? I want to do something to have more power , thats more HP. I dont want to give away a lots of money, but i need some more power too. So please help me and advise some thing what to do with my car.