Welcome to the North American Subaru Impreza Owners Club Monday April 21, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Technical > Factory 2.0L Turbo Powertrain

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 09-04-2012, 10:09 PM   #326
legacydreamz
Scooby Specialist
 
Member#: 92423
Join Date: Jul 2005
Chapter/Region: Tri-State
Location: locked in the freezer
Vehicle:
2002 WRX
still locked in freezer

Default

Quote:
Originally Posted by Bansheeboy11
It did on my car, stock ej20 with a catless exhaust. Vacuum/boost transitions and spool are improved a bit, as well as boost control at higher rpm.
I'll give it a try. Best thing about this mod is that its 100% reversible.
* Registered users of the site do not see these ads.
legacydreamz is offline   Reply With Quote
Old 09-04-2012, 10:10 PM   #327
Djimpreza02
Scooby Newbie
 
Member#: 328135
Join Date: Aug 2012
Location: CT
Vehicle:
2004 impreza WRX
Blue

Default

So, I've only read up to page 11....

But is this a good mod or not? I heard the stock BOV should not be touched until your using over 22PSI of boost? Or else it will in-fact hurt performance.

Does this mod also cause any more of a blow off sound.
Djimpreza02 is offline   Reply With Quote
Old 09-05-2012, 06:56 PM   #328
nate_fisher
Scooby Specialist
 
Member#: 270482
Join Date: Jan 2011
Location: albany ny
Vehicle:
2011 forester xt
corn fed td06 20g 8cm

Default

It made my bpv more noisey and it holds boost alot better between shifts.
nate_fisher is offline   Reply With Quote
Old 09-06-2012, 02:31 PM   #329
d0ugch0i
Scooby Guru
 
Member#: 198861
Join Date: Jan 2009
Chapter/Region: SCIC
Location: Orange County, CA
Vehicle:
2004 WRX
PSM

Default

gnna try this out. hopefully i feel a gain
d0ugch0i is offline   Reply With Quote
Old 09-06-2012, 03:47 PM   #330
Djimpreza02
Scooby Newbie
 
Member#: 328135
Join Date: Aug 2012
Location: CT
Vehicle:
2004 impreza WRX
Blue

Default

Has anyone seen the results on a tune or dyno? I think that is the major determination for doing this or not?
Djimpreza02 is offline   Reply With Quote
Old 10-15-2012, 03:14 AM   #331
d0ugch0i
Scooby Guru
 
Member#: 198861
Join Date: Jan 2009
Chapter/Region: SCIC
Location: Orange County, CA
Vehicle:
2004 WRX
PSM

Default

bringing this thread back to life. any more results anyone?
d0ugch0i is offline   Reply With Quote
Old 10-15-2012, 02:54 PM   #332
tjdonovan
Scooby Newbie
 
Member#: 334417
Join Date: Oct 2012
Chapter/Region: South East
Vehicle:
02 impreza wrx
black blue pearl

Default

good idea wish i could do that to my parents but i'd need the money simple mods like this r what i like to see. got anymore simple cheap mods?
tjdonovan is offline   Reply With Quote
Old 10-15-2012, 11:12 PM   #333
scubywrx89
Scooby Newbie
 
Member#: 325517
Join Date: Jul 2012
Chapter/Region: Tri-State
Location: westchester ny, stamford ct
Vehicle:
2002 wrx
blue

Default

Just crush the bov it will work good
scubywrx89 is offline   Reply With Quote
Old 10-15-2012, 11:35 PM   #334
Bansheeboy11
Scooby Specialist
 
Member#: 182415
Join Date: Jun 2008
Chapter/Region: Tri-State
Location: New York
Vehicle:
1999 RS
Aspen White

Default

Quote:
Originally Posted by legacydreamz View Post
I'll give it a try. Best thing about this mod is that its 100% reversible.
Quote:
Originally Posted by d0ugch0i View Post
bringing this thread back to life. any more results anyone?
My overboosting ended up being oily vacuum lines coming off the solenoid.

I got to really drive the car hard over the weekend with some buddies, did about 250 miles around the mountains over saturday night. Going from full brake to full throttle gets me nice, quick and steady spool, and a rock solid hold on the boost, quick vacuum/boost transitions seem to be a bit quicker/smoother as well. About 3 weeks ago we did this to another buddies car who also feels its improved driveability in the same ways i did, all in all this is a winner! I even bought some extra set screws incase my buddies want to do it haha
Bansheeboy11 is offline   Reply With Quote
Old 10-16-2012, 09:31 AM   #335
Harbs
Scooby Newbie
 
Member#: 335235
Join Date: Oct 2012
Location: QLD, AUS
Vehicle:
05 Liberty GT

Default

Quote:
Originally Posted by Gil View Post
did this today on my 05 LGT.

i borrowed a 1/4-20 tap from a friend and then put one of these in there. 83 cents for a pack of 2 at home depot.



I've done this exactly.. with the +08 plastic valve and have seen no adverse effects. 3mm vent in the side. Can now run 19psi on this plastic version with stock VF38.
+1 for this mod.
Harbs is offline   Reply With Quote
Old 12-19-2012, 05:00 PM   #336
nate_fisher
Scooby Specialist
 
Member#: 270482
Join Date: Jan 2011
Location: albany ny
Vehicle:
2011 forester xt
corn fed td06 20g 8cm

Default

I am running this just like above on the plastic bpv but now am running a td06 20g at 22psi on e85. Do you think it will hold up or should i bite the bullet and buy a forge recirculating bpv? I think its still working fine and my tuner was impressed but just wondering how far you guys have pushed this mod befor the breaking point.
nate_fisher is offline   Reply With Quote
Old 12-19-2012, 05:19 PM   #337
SeeeeeYa
Scooby Newbie
 
Member#: 129681
Join Date: Oct 2006
Location: WV
Vehicle:
2014 FXT Touring
SWP

Default

Quote:
Originally Posted by nate_fisher View Post
I am running this just like above on the plastic bpv but now am running a td06 20g at 22psi on e85. Do you think it will hold up or should i bite the bullet and buy a forge recirculating bpv? I think its still working fine and my tuner was impressed but just wondering how far you guys have pushed this mod befor the breaking point.
Modded properly, the more boost the tighter the BPV will be held closed... as described.

In other words, you are fine.
SeeeeeYa is offline   Reply With Quote
Old 01-22-2013, 11:28 PM   #338
wrxgunr
Scooby Newbie
 
Member#: 336361
Join Date: Oct 2012
Chapter/Region: VIC
Location: Victoria BC Canada
Vehicle:
2009 WRX 265
WRB

Default

Excellent mod. Amazing bang for...well it didn't co$t me anything!
wrxgunr is offline   Reply With Quote
Old 01-31-2013, 07:21 PM   #339
blehhh
Scooby Specialist
 
Member#: 316517
Join Date: Apr 2012
Chapter/Region: NESIC
Location: Portland, ME
Vehicle:
2012 WRB WRX Hatch
TP Stage III & ELH

Default

For something as serious as drilling a goddamn hole in your BPV, you would think people would have some better photos.

I want to do this, since it's free, but I haven't gained the appropriate confidence here.

Where on the stock BPV do I drill a hole in it?
blehhh is offline   Reply With Quote
Old 01-31-2013, 07:40 PM   #340
bluemk3
Scooby Specialist
 
Member#: 263694
Join Date: Nov 2010
Location: hollidaysburg, pa (central Pa)
Vehicle:
2002 WRX
World Rally Blue

Default

Quote:
Originally Posted by blehhh View Post
For something as serious as drilling a goddamn hole in your BPV, you would think people would have some better photos.

I want to do this, since it's free, but I haven't gained the appropriate confidence here.

Where on the stock BPV do I drill a hole in it?
Read the whole thread before your flip out.. They are on the second or third page
bluemk3 is offline   Reply With Quote
Old 01-31-2013, 07:46 PM   #341
blehhh
Scooby Specialist
 
Member#: 316517
Join Date: Apr 2012
Chapter/Region: NESIC
Location: Portland, ME
Vehicle:
2012 WRB WRX Hatch
TP Stage III & ELH

Default

Quote:
Originally Posted by bluemk3 View Post
Read the whole thread before your flip out.. They are on the second or third page
Those posts are from years ago, previous generation cars with metal BPVs.
blehhh is offline   Reply With Quote
Old 01-31-2013, 08:57 PM   #342
ride5000
Scooby Guru
 
Member#: 32792
Join Date: Feb 2003
Chapter/Region: NESIC
Location: lincoln, ri
Vehicle:
2003 GGA MBP
12.9 / 105+

Default

why not post a picture yourself?
ride5000 is offline   Reply With Quote
Old 01-31-2013, 09:37 PM   #343
blehhh
Scooby Specialist
 
Member#: 316517
Join Date: Apr 2012
Chapter/Region: NESIC
Location: Portland, ME
Vehicle:
2012 WRB WRX Hatch
TP Stage III & ELH

Default

Quote:
Originally Posted by ride5000 View Post
why not post a picture yourself?
Because I haven't done it?
blehhh is offline   Reply With Quote
Old 02-01-2013, 06:10 AM   #344
ride5000
Scooby Guru
 
Member#: 32792
Join Date: Feb 2003
Chapter/Region: NESIC
Location: lincoln, ri
Vehicle:
2003 GGA MBP
12.9 / 105+

Default

i mean of your virgin oem plastic bpv, so that someone can point it out to you.

ride5000 is offline   Reply With Quote
Old 02-27-2013, 11:13 PM   #345
norbs
Scooby Newbie
 
Member#: 135787
Join Date: Dec 2006
Default

Bumping this thread again. Anyone got a pic of the side vent hole they drilled on the newer plastic BPVs?
norbs is offline   Reply With Quote
Old 03-06-2013, 11:32 AM   #346
turkeylord
Scooby Newbie
 
Member#: 89016
Join Date: Jun 2005
Location: Fargo, ND
Vehicle:
2005 Legacy GT Wagon
ABP

Default

Just did this to mine last night - first drive definitely felt like it was easier to hold boost through shifts. Lovin it.

norbs - I drilled just high enough to be sure to clear the set screw.
turkeylord is offline   Reply With Quote
Old 03-06-2013, 03:16 PM   #347
KMA2
Scooby Newbie
 
Member#: 254771
Join Date: Aug 2010
Vehicle:
2011 WRX hatchback
silver - Stage 2

Default

Quote:
Originally Posted by norbs View Post
Bumping this thread again. Anyone got a pic of the side vent hole they drilled on the newer plastic BPVs?
Also interest in this... thx.

[edit]

Found pics here: http://forums.nasioc.com/forums/show....php?t=2169450

So here are the pics needed:

Quote:
Originally Posted by Gil View Post
Quote:
Originally Posted by Seventh View Post


Last edited by KMA2; 03-06-2013 at 03:57 PM. Reason: Found it
KMA2 is offline   Reply With Quote
Old 03-06-2013, 09:17 PM   #348
KMA2
Scooby Newbie
 
Member#: 254771
Join Date: Aug 2010
Vehicle:
2011 WRX hatchback
silver - Stage 2

Default

Quick question: I've read through the thread, but I'm hoping someone can explain to me why the stock BPV valve isn't designed this way to begin with? Is it to avoid surge for the "normal" stock driver? Thanks in advance.
KMA2 is offline   Reply With Quote
Old 03-07-2013, 05:44 AM   #349
ride5000
Scooby Guru
 
Member#: 32792
Join Date: Feb 2003
Chapter/Region: NESIC
Location: lincoln, ri
Vehicle:
2003 GGA MBP
12.9 / 105+

Default

yes, the stock valve will open with less pressure differential.

why they didn't just use a weaker spring? who knows.
ride5000 is offline   Reply With Quote
Old 03-07-2013, 01:33 PM   #350
Rescuer
Scooby Newbie
 
Member#: 176692
Join Date: Apr 2008
Default

thanks

Last edited by Rescuer; 03-07-2013 at 02:38 PM.
Rescuer is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -4. The time now is 01:14 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2014 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.