My question has been answered.Hear is the dyno from my E24 M6 '88.
-A100 Sprocket/Cam gear.
I pulled 226 RWHP with 15% drive drain loss I will say it comes up to crank 260hp. Bone stock is 256HP at the crank.
So, 4hp gain from a chip and through the RPM band its a lot better drive-ability compare to stock.