In my gymkhana car I have taken the rear leaf springs and turned the bottom 1 around and put it on top of the pack to get the rear lower and harder.
What i want to know is what will happen if i put a set of custom shocks in the back,will it help the handling

What i am trying to find out is if i go in to a corner hard the car tends to understeer witch i am trying to get rid of
Thanks

try braking before going into the corner
turning spring leaves upside down is not a very good idea and will not give a nice progressive spring rate.

bigger front sway bar to stop the understeering. try a 120y/b210 one.

Ha ha Yes braking will work!!! ,but i want to carry as much speed through the corner as i can, that is where the front wheel drive guys are hurting me.
I have 2 1200 sway bars on it helps a lot

shouldnt really be understeering that much then, try 2 120y ones but will probably lead to oversteering.

Rear sway bar and larger front one?

if u dont have a rear swaybar get one, if u do have one upgrade it by at least 2mm, try whiteline everything they sell is tracktested and works.

you need more front grip
bit of neg camber?
bigger or stickier tyres
sometimes a stiffer bar will just unload the inside wheel

try taking one bar off?

anything you do to the rear that helps is making the car slower because you reducing the rear grip

What tyres do you have any have you made any changes to camber/castor?

good point white sedan. 5 - 7 degree of caster will help alot 1-3 degree camber.

by the way for who mentioned breaking before turn. he mean shock breaking u just press before u turn the wheels and leave and press the gass as u turn the wheel