no load on the motor = no boost.... just cause your revving to 4k means nothing without load....you can sit at 4k in 3rd gear at a steady speed and be in vacuum.


and your going to have a fun time trying to keep the car running venting to atmosphere with a MAF...unless you put the BOV before the MAF. the maf will count all that air and add fuel as it thinks its needed...then you blow it out, but it doesnt know that, so you run rich and stall...more commonly happens on high RPM shifts.