Track Silvia S15 HE Tune Help

So I’ve been eyeing the S15 HE for a while and I decided that I want to start using it, but after I’ve upgraded it, I’ve realized that it has a very hard time braking on even the slightest turns without losing almost all grip. I’ve tried adjusting the differential settings, swapping the drivetrain, adjusting the braking balance & force, modifying the aero, changing the tire pressure and messing with the anti-roll bars, but it doesn’t really seem to help at all.

Does anyone know how I can fix or reduce the issue?