[Shogun]

Ok, if the crank, rods, pistons and heads are the heart of the motor, then the cam is the brains. Get an E, F, or TFS stage 1. Your slowing down because the air velocity is slowing down dew to the increased volumeteric efficiency of your induction and exhaust systems. Your cam simply can not keep up with the new found potential of the induction and exhaust systems. Air is moving to slowly through your motor. Remeber, a motor is nothing more than an elaborate air pump. The goal is to get as much air in and out as quickly as possible. All the components must work in concert to achieve this. If any one of those mechanisms is not up to the task, you will be slower. Rasing the fuel pressure may help. However, adding more fuel might only compound your current problem. In my opinon, your TB is to big for the application. A smaller TB and a larger mass air would yield greater results. Also, I think a larger cam is the cure for your horsepower woes. Sorry for the thesis guys.