REV LIMIT

good day all. i am reflashing jdm wrx sti. i am not able to reach my rev limit at full throttle but i am able to hit it at about 30% throttle. any ideas on this.

I'd need a lot more information as to what is going on to be able to offer a specific answer. With so little information to go off I'd take a wild guess that it may possibly be a misfire at full boost that's preventing the engine reaching the limiter.