fuel pressure powered by peer pressure.

last week, i found out why my machine sometimes jerk and sometimes perform well. Other times, knocking like hell, and sometimes it perform excellently that i just want to shout "hell, yeah..."But most of the time after i changed the injectors to 275cc (because the fuel is so lean), it runs like shit. So , after being bored with unstable condition of the car i decided to see a friend of mine ( after he beat me up like my car is thrash) and asks for advice. He checked my machine and said " man, change your exhaust setup, your regulator and most important, the fuel pump. So i had to go shopping for all these kind of things. We went to Ou yong exhaust shop and change the extractor to 2 inch,the piping to 1.8 inch straight pipe all the way to the tank and bent it and put a 2.3 inch pipe powered by a chicken brand apexi 2 inch muffler without a central box. the sound...loving it. the performance, i had to change  my fuel mapping from my vafc and the results are marvelous for 2 days.kehkehkeh. Then i ordered a walbro 255ml from hybrid garage and the taukeh even gave me a second stage chop shop fuel regulator.  i had it assembled and test the response and it was totally awesome. we had the setting run for two days and OMG, all these time it was the fuel pump pressure that's giving me headeache why my machine sometimes drop especially during a long period of driving and after a couple of whacking session ( i thought it was the clutches.) So, three hours ago while driving back from JAPAQ motorsport ( after purchasing a blitz pressure meter for a friend), we ran into two EK'99 spec. one is champion white and another one is spoon yellow. We test the machine with those EK's and it was a sensational feeling that i had for months since the problem arose. but now cam another problem after that whacking session. my air-conditioner compressor is totally damaged. so tomorrow...maybe to chop shop again?