To thread starter:
If want to increase pickup, yet dun wanna spend much.
1) Remove rear seat
2) remove spare tyres
3) change bonnet and boot to CF
4) Use forge rims (lighter)
5) Dismantle the aircon system
6) Remove all sound system
7) Change driver seat to plastic bucket seat
I believe can make your car 200 kg lighter. Sure will have better
pickup. Maybe by 1 sec? 
No passenger allowed.
Always do servicing using premium racing engine oil, good cable,
Vpower always and top up only 1/2" tank. It will wight 20kg lighter
than full tank.
There will always be a limit to what a car can do. Any better would
be change a better car.