the fuel system could be the problem.i have been thinkn about 60# injecters and a bap anyway.it kind of does act like you are runnin out of fuel.without the nos on the dyno here it done 495 hp and 535 torque. never done it on the nos.i am gettin ready to install a new clutch this week also.i am gonna try the centerforce dual friction.i guess i need to do some fuel system upgrading to.thanks for the suggestions.