even tho' my car is lowerd on ground control it still has this lil bounce to it ...how can i make my suspension more stiffer ?

 

There's different kinds of bounciness, like underdamped bounciness or just generally stiff bounciness. Remember, your car is riding on springs, its going to oscillate up and down when it hits a bump.

What kind of bounce are you seeing? Does it feel like the cars goes up and down and up and down uncontrollably after it hits a bump? Or is it just a harsh ride over bumps?