Ide look into a fuel pump if yours is still stock. Also you say you have no kr but whats your timing at wot? if its below 17-18* your losing power. Ide say if your running 18* at 11.5:1 afr then gauge your pulley size there.
Also forgot to mention, ide run 110s with the cam and think about a vs. sure the xp makes more peak power but the vs overall is a better cam for street and even at the track your gonna have alot more low end power and it will be steady throughout the entire powerband where as the xp is kind of like powerband and you really cant get the most out of that cam without better springs double roller ect.
