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Old 01-29-2012, 10:32 AM   #53
Scooby Guru
Member#: 261612
Join Date: Oct 2010
Location: Minneapolis, MN
2002 WRX - 750WHP
9.5s @ 150mph


I believe the line you are referring to, is going to the MAP sensor. That line comes off the manifold and has a filter. The line to the EBCS comes from the turbo's compressor housing and is T'd off to the wastegate actuator.

Most people use the line from the manifold to the BPV but the line to the MAP sensor should be fine too. I wouldn't use the one between the compressor and the EBCS because that one will likely read a hair higher and if it were to leak from that location it could cause a lack of boost control and over boosting.
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