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Old 01-25-2013, 02:19 PM   #576
sdocsubi
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even tho this is 5 years old definitly still cleared some things up for me, thanks for the write up
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Old 01-29-2013, 05:51 AM   #577
motorbreath16
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yeah thanks for this info. ive been looking for something like this to confirm my thoughts about where my boost leak is coming from. definitely going to check my bov
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Old 01-31-2013, 08:31 AM   #578
berto123wrx
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Question Idk

Ive always been looking for just an aftermarket Bov or 50/50 but never knew if it was worth it just to have for minor upgrade in preformance if it really even matters. for the longest time ive been looking at synapse syncronic recirc. valves but have heard mixed things. Im currently stage two about to put headers and up pipe on and thinking about a TD05 turbo down the road so idk if a BOV is worth it?
Thanks
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Old 02-01-2013, 07:08 PM   #579
philvia
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If I were you I would just stick with the stock bpv, you can always crush the top of it down to make it hold a few more psi. That's what the 1g dsm guys used to do.
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Old 02-01-2013, 07:23 PM   #580
amalgrover
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you can't crush the 08+ plastic bpv's


edit: can't is a strong word...let me rephrase...the average person can't easily crush the 08+ plastic bpv
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Old 02-20-2013, 05:10 PM   #581
robert872
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Great Help :ddd
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Old 02-26-2013, 02:03 AM   #582
08_sti
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Say no to bov's.....
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Old 02-26-2013, 02:45 PM   #583
amalgrover
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08_sti, you are well on your way to making the biggest newbie mistake of not reading. By what you posted, we all can tell that you didn't read a single thing in the original post.
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Old 02-26-2013, 03:47 PM   #584
rosedaleny806
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2002 WRX GD PSM

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just installed my GFB on my 12' WRX at 70% Recirc. it runs perfect.
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Old 02-26-2013, 04:00 PM   #585
brett192
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Stage 2 w/ 6 speed

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I disconnected my stock BPV from the recirc hose last weekend, plugged the hose with a 1" PVC plug (used in plumbing) and then went for a drive to hear the rice.

Upon starting, the car runs like crap, fluctuating idle and sometimes stalling if I let the RPM drop too far. I couldn't even let the car idle unassisted.

Now, why is it that I can go from a perfectly running car, to this, by simply disconnecting the recirc hose? I would understand it running poorly after a few vents to atmosphere, but immediately after starting? I don't even think the ECU can 'learn' that quickly.

Other than the idling problem, it popped a few flames and would be extemely shaky starting out in 1st and shifting into 2nd. It is not shaky for the most part with the BPV connected.

Reconnected the BPV and car instantly runs 100% better.
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Old 02-26-2013, 06:11 PM   #586
Hasty180
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Obsidian Negroid

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Question:

If you go aftermarket BOV (ex. TSI RFL BOV) on a 2011 WRX Limited IN ADDITION TO a cat-back exhaust....Would there be any requirement for a re-tune. im pretty sure not, but theres far more familiar folks here than I. LEMME KNOW-
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Old 02-26-2013, 06:14 PM   #587
brett192
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Stage 2 w/ 6 speed

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Quote:
Originally Posted by Hasty180 View Post
Question:

If you go aftermarket BOV (ex. TSI RFL BOV) on a 2011 WRX Limited IN ADDITION TO a cat-back exhaust....Would there be any requirement for a re-tune. im pretty sure not, but theres far more familiar folks here than I. LEMME KNOW-
You do not need a tune for the catback.

You cannot tune to compensate for a BOV venting to atmostphere.

If you are talking about a full recirculating BOV, it will work the same as your stock BPV, no tune required.
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Old 02-27-2013, 12:47 PM   #588
Trnapartpap3r
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WRB - "Dafini3"

Talking Newbie first post

As a newbie to the scoobie, I appreciate the time and effort put into the the original post, it helped me out a lot. Seems like it comes down to preference of liking the sound and taking the risk with leaks, as with any mod your going to have your pros and cons, this one being a fairly minor one. With that being said I made my choice and went ahead and got one, went with the turbo smart Subaru specific application.
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Old 02-27-2013, 06:31 PM   #589
Hasty180
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Obsidian Negroid

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Ladies/Gents, thx you very much!
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Old 03-05-2013, 06:45 AM   #590
Rescuer
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Quote:
Originally Posted by berto123wrx View Post
Ive always been looking for just an aftermarket Bov or 50/50 but never knew if it was worth it just to have for minor upgrade in preformance if it really even matters. for the longest time ive been looking at synapse syncronic recirc. valves but have heard mixed things. Im currently stage two about to put headers and up pipe on and thinking about a TD05 turbo down the road so idk if a BOV is worth it?
Thanks
Quote:
Originally Posted by philvia View Post
If I were you I would just stick with the stock bpv, you can always crush the top of it down to make it hold a few more psi. That's what the 1g dsm guys used to do.
this thread might be of interest

http://forums.nasioc.com/forums/showthread.php?t=454965
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Old 03-05-2013, 07:44 PM   #591
ResidentR
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Location: Centreville, VA
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DGM

Default

Quote:
Originally Posted by brett192 View Post
I disconnected my stock BPV from the recirc hose last weekend, plugged the hose with a 1" PVC plug (used in plumbing) and then went for a drive to hear the rice.

Upon starting, the car runs like crap, fluctuating idle and sometimes stalling if I let the RPM drop too far. I couldn't even let the car idle unassisted.

Now, why is it that I can go from a perfectly running car, to this, by simply disconnecting the recirc hose? I would understand it running poorly after a few vents to atmosphere, but immediately after starting? I don't even think the ECU can 'learn' that quickly.

Other than the idling problem, it popped a few flames and would be extemely shaky starting out in 1st and shifting into 2nd. It is not shaky for the most part with the BPV connected.

Reconnected the BPV and car instantly runs 100% better.
The stock bpv isn't entirely closed at idle, so air is being pulled in through the uncapped BPV and bypassing the MAF, which will throw everything else off.
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Old 03-06-2013, 01:43 AM   #592
mccadney
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disregard this
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Old 03-14-2013, 04:07 AM   #593
Wrxtacy5150
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OBP

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Good write up, too many BOV threads that are too bias.
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Old 03-17-2013, 12:13 PM   #594
20satinwhitebeast13
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Location: san diego
Vehicle:
2013 wrx
satin wite

Default bov could cause my over boost

Hey fellas need some info first time wrx buyer and having alot of problems so far.
Car currently has
cobb bov
spt exhaust
invidia down pipe (catted with bracket to conform exhaust)
cobb intake and box
turbo heat shield
and cobb ap running acn91 stage 2 sf (super low waste gate)

im change map after map and im still overboosting i do the live data log and i overboost in 4th gear and 19.1 pounds and stay overboosting in 5th gear around 18.5 to 19.5 the whole time

i have all the parts that the guys have recommended and i know of people who have the exact same parts and running the ap map and not even close to overboosting the only difference is my bov (to my knowledge its installed correctly )

is it possible
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Old 03-28-2013, 01:57 AM   #595
dtl45
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So while buying a Nameless Performance midpipe for my '11 WRX, the Synapse DV caught my attention, so I splurged and got that too. Any tips on push vs. pull mode? What will sound better and give me the greatest performance gains? I've done some research and watched some videos, but I wanna hear what the NASIOC folks gotta say.
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Old 03-28-2013, 12:03 PM   #596
patrickrobare
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pearl blue

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as far as "tuning" for a bov, would running speed density help reduce the negative effects?
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Old 03-28-2013, 08:12 PM   #597
amalgrover
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2009 Forester XT

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Speed density completely removes the issues altogether because you are no longer using your maf sensor to calculate fueling.
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Old 03-28-2013, 11:25 PM   #598
TURBObro10
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WRB

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Awesome write up, have wondered about this since I got my Subie. Thanks alot.
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Old 03-31-2013, 09:37 PM   #599
patrickrobare
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pearl blue

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Quote:
Originally Posted by amalgrover View Post
Speed density completely removes the issues altogether because you are no longer using your maf sensor to calculate fueling.
Would their be any negative effects to this? i wanted to try it because i have the option using the accessport race tuner but i didnt know if it required adjusting or if the maps were automatically calibrated.
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Old 04-01-2013, 02:44 PM   #600
amalgrover
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2009 Forester XT

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no negative effects from going speed density, but your maps on the accessport are just base maps. To be accurate, you would want them adjusted.
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