I have a 95 camaro with a 383 lt1, ported stock heads, 306 cam, rev kit, 1.6 rockers, long tubes, six speed, 3:73 gear, 30 lbs injectors, ported mass air, 58 mm throttle body, walbro fuel pump, no cats, no egr, noair pump and a pcmforless tune. The car runs strong up to 6100 rpm then it feels like it ran out of gas. The injector pulse drops by half at 6100 rpm. The maf sensor, throttle position sensor,and o2 sensors seem to be reading right for wide open throttle and do not change when the injector pulse does. Any Ideas?