12civic si RPM dip and random stft problem

[GAOHONGXIN]

dont have idea where the problems are at

car got 410cc rdx injector
zdx throttle body
2.5 inch exhaust
header
skunk 2 manifold
rbb head
dc5 cam
light flywheel

idle drop around 0:56
strange stft after 4:00

hope some one can explain where i did worng

things i did
make change on the tb flow chart
injector size and latency
fuel pressure
fuel cut and recover rpm

road tuned

any help and suggestion would be appreciated. thanks!