Quote:
Originally Posted by sperry
It's not a lot more spooling with a BOV, but it's there. It's especially noticeable when you're on and off the throttle mid-corner under boost... w/o the recirculating BPV you'll quickly kill off the boost in the system.
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This is really the key more than the post shift time IMHO. One of my students at Miller in an '04 STI had a atmospheric BOV and his mid-corner response was madning. It bascially makes throttle steering nearly impossible because there is a significant hiccup do to the lost air and sudden rich condition, and you are never sure when it is or isn't going to happen.
And while I wasn't logging, I would bet that if you are in closed loop, the ECU sensing the rich condition then pulls fuel resulting in a lean condition shortly there after when the BOV closes.