HELP! BJ4 WE on hard clay track

[NSDie]

BJ4 WE owners,

New to the hobby and also an avid visitor of this forum. first time posting here. I would appreciate it if you could help me out here.

Current setup
Tires: Proline Holeshot M3
Shocks: Piston # 2 F&R. Spring Silver F and Green R
ESC and Motor: LRP TC spec 5.5T
Spur: 78 Pinion: 15
Track: Hard packed clay smooth. Small track with many big jumps and turns.

Problem:
Car is really nervous, no rear traction.....The rear end just spins out everytime I accelerate or negotiate a small turn. Other cars just seemed to drive like they are on rails.


Questions:
1) Tires
People at my local track told me that I am running with the wrong tires. Just ordered the Double Dees. I wonder this would help.

2) Camber link washer
I have read on this forum regarding setups. Found a recommendation that I should add more washers to the inner back camber link. My question is what does adding more washers physically do the car's behaviour? I am lost there.

Your help is very much appreciated. Cheers