the following is what i noticed on a 14.5 psi or 3.25" pulley
The other day i was changing the TB for a Bigger one(long story)
i started the Car with the aftercooler off the TB and noticed that it blows high amounts of air in idle..I checked the Bosch OEM BOV from comptech it was blowing too but not the amount that it has to i think.. than i closed the Aftercoolers Output with my hand and checked the BOV it was blowing more than before but not as much as i thought it should,and in the mean time the SC changed sound and the Engine also changed rpm slightly i think..
so the question..is,should i change the BOV? is the Bosch one flowing too little..
the reason i didnt change it is because i like the sleeper sound of the car and not have the external BOV sell me out.

So you toughts guys. i am thinking of HKS BOV ,at least when i was contemplating changing the BOV

in the end,if the BOV doesnt do the job as it should i thing at higher RPM when you step of at 8k and dont push the clutch i can imagine whats amounts of air the SC is pushing trough the Bosch BOV and whats happening.
stefce

 

No need to have a bov on a sc setup. A bypass will due just fine.

 

i just wanted to ask..since the Turbo setup is not pushing pressure when you are off the gas at 7krpm..pushes a little but not as much as a SC since its spinning the same Amount of Air doesnt matter if its WOT or closed throttle..and the turbo isnt pushing the amount of air at idle also as the SC.
thats the trade off right there,...the SC is constantly robbing the Engine of energy..
thats why i tought in my mind that maybe a SC needs a Large and a good BOV than the same Pressure turbo?