How to balance wieght, ride height and spring rate

[Maxbashing]

Hi all,

I am fairly new to this racing thing and need some advice on a Cougar SV setup.

I entered my first race this weekend and it went really well but I was finding that I really would like more rear end grip as I come out of corners (I'm sure a softer throttle finger will also help).

To try and achieve this I am trying to put as much weight towards the rear as possible but as I do this of course the ride height is dropping. To counter this I have wound more pre-load into the springs but my brain is telling me this is stupid as it will be stiffening the rear end and therefore making it more likely to slide.

I bought the car second hand so I am not 100% sure about the current spring rate but I presume they are the kit standard ones, I was thinking that I would like to put on some softer springs but again I am concerned this will make the ride height issue even worse.

Can anyone provide any thoughts?