it may be that Tim gave you a tune with reduced timing so that the a/f ratio could be checked before giving you a more aggresive tune. did he mention anything about sending the flasher back after going to the dyno?
Its in the tune......a good dyno tuner will get you up there....my Auto make 264 hp all motor and thats without cams...and runs 12.90's......You should be able to get about 30-40 more RWHP with a good tune! Those times should be around 12.30-12.50!