FD loss of boost 6k on
 

Hi, ive noticed when i'm boosting that once i hit 6k rpm, the car feels like it's lagging or holding back. I don't know if this is normal or not as it feels it has more to give.

I am running stock turbos with mods and a remap aswell. The car pulls really well from around 4k 4.5k onwards to 6k but then almost feels like it hesitates to keep pulling..
I am new to rotaries so any advice would be greatly appreciated thanks :)