460 wont rev past 5400rpm
ok guys, I will start out with the engine combination as i know every one wants to know that first, Its based off the 500hp engine in the hp chart, 30over 460 with 9-1, trick flow power port 290heads with 120lb springs, it has the 274xe cam, msd probillet dist, blaster 2coil, 6al ignition, holley blue pump, 850holley, running inital timing at 17 and full at 36. so engine wont rev past 5400rpm and almost seems like its hitting the rev limiter but its a lot more aggressive and engine will loose rpm and pop and miss. if i lower rev limiter to 5300 it comes up on the limiter fine and if i raise limiter higher were it would never hit it still misses and pops.so things i have tried so far, changed coil, changed plug wires, tried another msd box,checked that i am getting lots of fuel even swaped another pump i had,changed plugs and narrowed gap from .45-.35, swapped holley 850 to a 750 edelbrock, checked rocker arms didnt find any loose and reset to 1/2turn preload. Im not sure if its a ignition problem or valve float. I have a hard time believing its valve float as their brand new heads and springs. Only thing i haven't changed is the cap and
rotor and i cant see the pickup causing any problems as it ohmed fine.