How do you vent the stock BOV, or even use an aftermaket vented one for that case? There must be some modification that needs to be done since it is re-routed back to before the AFM so that when it releases air it goes back through the AFM to ensure that you don't run your engine rich while venting. How do you vent a BOV when you have an AFM without screwing this up???

 

The bov does not re-route back before the AFM. the stock bov (air bypass valve) routes to the turbo inlet duct after the AFM. when you open vent it, you just block the hole on the TID and put a one way valve on the stock BOV (it sucks air back in too).

An aftermarket BOV doesnt need the one way valve. Do a search for venting BOV and there used to be a few threads and how to's.

 

You can't. If you open-vent the stock BOV or use an aftermarket one, you will cause a momentary rich condition which may cause the car to bog slightly between gears. Some cars might, some might not. Here's a write-up if you wanna try it.

DIY open-vented BOV

 

Mine is open vented with a cheackvalve, and I didnt see any ill effects