Sorry for late reply. My FDR is 5.7 and using Hobbywing motor.
ESC settings is:
DDRS 8
Boost 28
Turbo 28
Start RPM 6000
Turbo Open Delay 0.1
Timing ACC 500

211 STOCK FW.
I will try a larger pinion (FDR 5) and higher turbo settings and will see what happens. Lowering the FDR maybe not a good idea for HW motor, because HW motors want higher RPMs to show their performance.