hey guys, i have a question.. why wont my boost climb above 0.5 bar/ 7.5 psi on sixth gear? and the car choked when it hit 0.5 bar.. nothing wrong with the first 5 gear im running like 22-23 psi right now but what happen on sixth gear.. heres the situation i was cruising down the highway on sixth gear and saw this 335i passing by so i step on it the car choked when i reach o.5 bar and wont climb any further any ideas?

i just installed hallman pro and walbro 255 + a tune nothing els

 

Does it sputter or anything or just die out?

 

i didnt hear anything loud though it feels like its about to die out but i didnt keep pushing it.. i just drive it under 0.5 bar it wont choke what cause it? is it the mbc the pump or the tune? i feel like my cars like a 5 speed now sixth gear wont boost

 

Compressor surge.