Kz driving

Yeah, i know that the video is on vertical, but at the day i didn’t have another go pro mount and i’m 1.60m, so no way to put that camera normally. In the video i’m doing 1.5 seconds off the time on that day, and I want some tips to reduce this gap, please. Other thing is that my engine is doing a weird sound exiting the corner, and I wanna know if was a engine problem or just so much grip in the tune. Thanks!