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Go Back   NASIOC > NASIOC Technical > Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo)

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Old Yesterday, 12:34 AM   #1
Matty G
Scooby Newbie
 
Member#: 329820
Join Date: Aug 2012
Chapter/Region: South East
Location: North Carolina
Vehicle:
1999 Impreza 2.5rs
Rally Blue Pearl

Default Check Valve in Boost solenoid plumbing?

Can anyone confirm or deny that there is a check valve in the lines from the compressor/wastegate to the BCS. Or somewhere in the related plumbing. I do not have one and at present, I have the restrict. pill removed and am only getting wastegate pressure. If I add the pill, it climbs higher, but doesn't give me any power. Can someone give me some info on the check valve (if that is indeed what it is) in the lines.
Thanks
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Old Yesterday, 07:23 AM   #2
quazimoto
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Member#: 70395
Join Date: Sep 2004
Chapter/Region: MAIC
Location: Da-boonies,Va
Default

Go here: http://forums.nasioc.com/forums/show....php?t=1169980

Read the boost control FAQ's
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Old Yesterday, 11:53 AM   #3
Matty G
Scooby Newbie
 
Member#: 329820
Join Date: Aug 2012
Chapter/Region: South East
Location: North Carolina
Vehicle:
1999 Impreza 2.5rs
Rally Blue Pearl

Default

Thanks for the info. I've read that along my journey. It doesn't mention a check valve that I can see and the picture doesn't show one. But every other stock model that I have looked under the hood of has either a check valve or a hose reducer for some reason. I just want to know if anyone know for sure what it is. I am missing it.
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Old Yesterday, 12:54 PM   #4
Chaz2.5
Scooby Specialist
 
Member#: 168181
Join Date: Jan 2008
Chapter/Region: TXIC
Location: El Paso TX, Klamath Falls OR
Vehicle:
1999 EJ205 RS coupe

Default

No check valve. There is a reducer due to the connectors on the bcs being too large to fit the lines coming from the turbo. Should just be the restrictor pill in the vacuum lines on the compressor side of the "T" fitting.

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