@sdi_03 , i gave a new try to your setup and after a certain time , i approached my time, thanks for this excellent setup.
with small modification and obviously excellent
@v8_pursuit gear box (first one), I managed 1.53.220
Thanks to all by sharing setup and giving advice/info. This helps to improve skills

Setup used
BB -1
suspension based on
sdi setup with some modifications :
140 110
1,85 1,85
10 10
67 67
89 89
2.0 2.5
in 0.30 0.00
LSD
15
15
20
V8_pursuit Gear box
initial Final : 2.750
max speed : 180
4.136/85
3.334/106
2.774 /127
2.397/147
2.111/167
1.893/199
Final : 2500