Ok guys, i found the cause of the problem i was having.
I had incorrectly installed the N1cams, the intake cam was in fact advanced one tooth. The car got tuned like this (with dastek unichip) and was audibly detonating on the high lobe and also missfiring beyond 7300. Here is the dyno graph from that day:
After realising my mistake and correcting the cam timing, i took it for a power run on a dynojet with no changes to the tune:
So as you can see, im at 209whp and the tune needs work. Thats it for now.
Next time i hope to be using nismotronic instead and raising the RPM limit.