Inliners International Forums General Discussion Engines Lump Ports in a Work Truck

So I'm seeing 168 cfm in stock condition, add 25 cfm without the lumps or add 50 CFM more airflow with the lumps at .500 lift. The difference between the lump port and just the open chamber looks to be 10 lb/ft. of torque and 13 Hp.at 5000 rpm. Now at 3000 rpm the power and torque is negligible between lump port and open head, but both improve over the stock.