going by that data ^ the kent 288 should be 60 deg more duration than stock, but at 1mm lift its only 16deg more duration, and all 4 valves are open the same amount at tdc
so the reprofiled cam is opening the valve less aggressively than the stock cam, which makes the reprofile more peaky/laggy
ideally you need an aggressively fast opening/closing cam that does,nt spit shims (valvebounce)
opening and closing faster leads to more "true" duration,
