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02-03-2009, 01:03 PM | #1 |
Scooby Specialist
Member#: 123362
Join Date: Aug 2006
Chapter/Region:
MWSOC
Location: Dorothy's House
Vehicle:'97 E36 M3 351W FTW |
Apexi CAI Users Chime In
I reviewed the installation diagram for my Apexi CAI and noticed they instruct you to install the metal restrictor pill between the IC and BPV. Can someone explain why this is needed and did you install this with your intake? I haven't measured the pill opening but looks to be half the ID of the stock BPV ID.
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02-03-2009, 04:07 PM | #2 |
n00b Moderator
Moderator Member#: 811
Join Date: Jan 2000
Location: WA
Vehicle:2000 RS-Ej20G It tastes like burning |
I installed mine because Apexi told me to!
It's obviously used to limit the amount of air that can go back through the intake. It's probably just for noise reduction, or maybe protect the MAF? -Rob |
02-03-2009, 10:27 PM | #3 |
Scooby Specialist
Member#: 123362
Join Date: Aug 2006
Chapter/Region:
MWSOC
Location: Dorothy's House
Vehicle:'97 E36 M3 351W FTW |
Thanks rob. I planning on following the diagram, but was curious of its purpose. A friend figured with the change in back pressure (with the CAI vs. OEM), additional back pressure was needed on the system. If my Japanese was better I probably would find it in the text instructions, but I'll stick to the diagram and use it.
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02-12-2009, 08:07 AM | #4 |
Scooby Newbie
Member#: 177589
Join Date: Apr 2008
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1000 soldiers couldn't protect the legendary MAF from much.
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07-25-2010, 08:23 AM | #5 |
Scooby Specialist
Member#: 61077
Join Date: May 2004
Chapter/Region:
SCIC
Location: Who Cares?
Vehicle:1993 WRX Silver |
I finally picked one of these up. Installed the restrictor, but the bpv is still loud as hell! lol Anyone every try without the restrictor?
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07-25-2010, 08:44 PM | #6 |
Scooby Specialist
Member#: 123362
Join Date: Aug 2006
Chapter/Region:
MWSOC
Location: Dorothy's House
Vehicle:'97 E36 M3 351W FTW |
I'm not using it. BOV is loud, but no other notable issues.
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05-07-2012, 05:56 PM | #7 |
Scooby Newbie
Member#: 249890
Join Date: Jun 2010
Chapter/Region:
Tri-State
Location: Ardsley, NY
Vehicle:1995 Impreza L wag white |
it's def louder with the restrictor. wondering what it's for
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