XRAY - Model racing cars

Hello...I am a new member at the forum!!!!
Here is a pic from our local track
Here is the setup sheet of my car
My question is... the car is very stable and fast but in center of the track at the big closed turm the car understeet alot and i have to slowdown .
What is your opinions
Thanks!!

Looks like an on-power corner. The things giving you on-power understeer are:

You've lowered the rear roll-centre on the wishbone hangers, try putting these back to kit. If it then oversteers on the other sections, go back to a solid front block to calm it down.

You've got quite a lot of droop for the ride-height you're running. Try 0.5mm less all round (5.5f/4.5r).

Try an LTC-R shell. The GX understeers and almost everyone finds the LTC-R faster on tarmac.

Thanks for the tips
Also thinking to put graphite wishbone, hard rear hub and 52 shaft at the back
I all ready bought ltcr body i have only to cut and paint it
Thanks!!!!

Thanks so much
i will try it very soon