I notice the loss in power after the Blitz DD BOV install to stock IC pipe. BOV does not recirculate back into the intake, just vent into air. What could of cause the loss of power? Do I need to recirculate the air back into the intake and how? BOV doesn't look like it could recirculate into intake. Thanks.

 

expect flames.....

been discussed many times.
with the evo the best way to do things is recirculate. they dont run good with VTA

Sell the bov and get a recirculating one. they only way to make the vta work right is with replacing the maf sensor with a map sensor wich can only be done with a standalone wich is about 2000 when all is said and done.

 

Not recirculating cause the engine to run REAL rich for a sec after venting. You car uses a system that meters the air intake and supplies a specified amount of fuel to match the air. When you vent this "counted" air, the fuel is still added regardless.
You should recirculate unless running a MAF/MAFT setup.