Need help with my 1969 camaro z28 RM

[btsniper]

Here is my current tune:

Max power 550 hp (all parts)
Weight 1085 kg

Aero: 10/20
Transmission
1st 3.412 2nd 2.338
3rd 1.684 4th 1.289
5th. 0.992
Final 3.929
Top speed 149
LSD 60/60/5
Suspension
Ride Height -15/25
Spring Rate 12.5/ 9.0
Dampers(E) 2/7
Dampers(C) 8/2
Anti roll bars 3/3
Camber 0.0/0.0
Toe 0.00/0.00
Brake Balence 6/5
I was wondering if you guys can give me advice to improve this tune. It is great off the line and can trap 130-132 mph on Indy road course

 

[btsniper]

I accidently had ballast weight on 200 kg, I took it off now I trap 134-136 mph
btw launch in 2nd gear

 

[Slash]

Increase your rear toe slightly in 5-10s and test it out. Soften your spring rate a bit. Tranny I can't really help unless I saw it on a graph, but and try and get the longest gear possible for second, the rest will come with ease.

 

[eightlives]

That is about right for your trap speed.

 

[DLR]

Make sure you flip the tranny. Also, try experimentation with rear toe...

 

[btsniper]

Thanks for responding, I'll try to experiment with the toe