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Old 12-13-2011, 05:29 PM   #251
IHaveADream
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Simply brilliant. Great resource. Thanks so much!
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Old 04-01-2012, 04:07 AM   #252
Jaymansomething
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In for later read
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Old 04-27-2012, 02:46 AM   #253
sleazy07sti
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Hey bro quick question.I'm currently running a tial 50mm bov that is not welded to my fmic pipe.it is held on with a tmic flange thay bolts to a fmic flange ,two clamps and a silicone tube between them.I purchased it from a nasioc member who from what I Belive had a 14psi spring and I was getting nothing but surge.everyone told me that this is how it was suppose to should so I drove on it for 2-3mnths.so today I purchase a 11psi(pink) spring as I'm running -17 to -21 in vac at idel but I'm still getting the surge.could this be because it is not welded to my pipe and I'm leaking like crazy or should a try a 10 or 12 psi spring?
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Old 04-27-2012, 03:15 AM   #254
DaveC113
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Quote:
Originally Posted by boost-o-matic View Post
In light of the fact that it sounds as though the part has changed for the '08+ WRX's, here's my ?

I have a 2010 WRX and am being told that the OEM BPV or BOV(whatever your preference) leaks at around 17-18 psi. Is this true? Looking to get my car custom tuned soon and want to know if I need to upgrade this part or not prior to tuning. Also need to determine if running the OEM intercooler on my 2010 is going to be okay at 18-19psi. Hearing stuff about the plastic endtanks not withstanding boost much beyond 18psi. I don't ever plan on running high boost(race fuel), but do want to have a 93 octane map made which will wiststand an additional psi over 91 octane. I will be daily driving on 91. Don't really want to spend another $850 upgrading the BOV and i/c as I'm planning to keep the stock turbo, but just add things like EL headers, up-pipe, intake and EBCS to compliment my TBE and AP.

Anyone pressure tested the OEM BOV in the '08+ to see where it starts leaking? Did this on the eclipse I used to have and the OEM unit held to 23 psi. I gave a way my turbo pressure tester with the last car when i sold it. Guess I could always make another one.
I have exactly the same question, same car, same mods... don't want to waste $175 on a new bpv if I don't have to... anyone?
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Old 05-03-2012, 03:33 PM   #255
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nvm11
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Old 07-30-2012, 11:53 AM   #256
Nathan_troy1983
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Great post, I am so glad that I am reading before buying any of these parts.
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Old 08-10-2012, 10:08 AM   #257
eXploited_GR
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Need some help..

I have a 2008 STI and my By-Pass valve has a crack in the elbow where the hose connects... and I need to get a new one ASAP.. But I cannot find one in stock anywhere...

What are my options as to what will fit? Any WRX BPV??
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Old 08-10-2012, 05:59 PM   #258
jay25RS
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Quote:
Originally Posted by eXploited_GR
Need some help..

I have a 2008 STI and my By-Pass valve has a crack in the elbow where the hose connects... and I need to get a new one ASAP.. But I cannot find one in stock anywhere...

What are my options as to what will fit? Any WRX BPV??
So the elbow is cracked and not the bov? Just get a WRX one (pre 2008) and it'll bolt to your bpv.
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Old 09-07-2012, 06:27 PM   #259
Meech3k
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Thanks for all the FAQs. I read a couple of your threads already, answering my questions and ones I wouldn't think of. Good ****!
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Old 09-24-2012, 08:08 PM   #260
cjkarling
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Quote:
Have the OEM BPVs changed over the years? Yes. 08+ Subarus have a BPV that is plastic. So if you for some reason you have a plastic BPV, it will not hold as much boost as the old metal ones. The plastic ones will only hold ~17PSI give or take.
I have a 2012 WRX stage 2 pumping out 19.5 PSI. Is my plastic BPV leaking?
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Old 09-24-2012, 08:09 PM   #261
WRB19
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Quote:
Originally Posted by cjkarling View Post
I have a 2012 WRX stage 2 pumping out 19.5 PSI. Is my plastic BPV leaking?
no .
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Old 09-24-2012, 09:17 PM   #262
cjkarling
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How can you tell if it is?

BTW; This is my second WRX, I have a 2003 Bugeye that was stage one, I knew a lot of this stuff, but I have been out of the game for about 8 years.
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Old 10-11-2012, 07:33 PM   #263
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Quote:
Originally Posted by Unabomber View Post
No. You need to read the post again. BPV/BOV that 100% recirculates = 100% fine. Anything else = rich.
sorry but i am confuse.. so if i get this then i wont be running rich? http://www.importimageracing.com/for...7-wrx-sti.html coz it said its 100% venting D:

Last edited by Fail Puff; 10-11-2012 at 07:44 PM.
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Old 10-11-2012, 07:36 PM   #264
the suicidal eggroll
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Quote:
Originally Posted by Fail Puff View Post
sorry but i am confuse.. so if i get this then i wont be running rich? http://www.importimageracing.com/for...7-wrx-sti.html
Does it recirculate? No, therefore it is not fine to run, and will make the car run rich.
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Old 10-11-2012, 08:46 PM   #265
Fail Puff
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so..all BOV will run rich then D:
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Old 10-11-2012, 08:53 PM   #266
Fail Puff
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Quote:
Originally Posted by the suicidal eggroll View Post
Does it recirculate? No, therefore it is not fine to run, and will make the car run rich.
what if i get it tune?
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Old 10-11-2012, 08:56 PM   #267
the suicidal eggroll
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Quote:
Originally Posted by Fail Puff View Post
so..all BOV will run rich then D:
Yes

Quote:
Originally Posted by Fail Puff View Post
what if i get it tune?
You can't tune for an atmospheric BOV
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Old 10-11-2012, 09:03 PM   #268
Fail Puff
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ohhh ok but regular ones i can yeah?
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Old 10-11-2012, 09:06 PM   #269
brett192
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If it's an aftermarket BOV that recircs 100% back into the intake, it'll be essentially the same as the stock BPV tuning wise.
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Old 10-11-2012, 09:10 PM   #270
Fail Puff
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so its tuneable! D: lol well if its pretty much the samething as BPV then its good!?
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Old 10-11-2012, 09:11 PM   #271
the suicidal eggroll
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Quote:
Originally Posted by Fail Puff View Post
ohhh ok but regular ones i can yeah?
What? I think you need to go back and read a bit. Start here:
http://forums.nasioc.com/forums/show....php?t=2339839

If by "regular ones" you mean recirculating bypass valves (BPV), then there is nothing to tune for, because they work exactly like stock.
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Old 10-11-2012, 09:11 PM   #272
the suicidal eggroll
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Quote:
Originally Posted by Fail Puff View Post
so its tuneable! D: lol well if its pretty much the samething as BPV then its good!?
What on earth are you going on about?
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Old 10-11-2012, 11:25 PM   #273
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Quote:
Originally Posted by Fail Puff
so its tuneable! D: lol well if its pretty much the samething as BPV then its good!?
No....you can't. People are confusing a BOV with a BPV.

You cannot tune for an atmospheric BOV.
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Old 10-11-2012, 11:45 PM   #274
rocketperson7
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unless it's speed density
:stirpot:
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Old 10-11-2012, 11:47 PM   #275
tjmmason93
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Quote:
Originally Posted by the suicidal eggroll
Yes

You can't tune for an atmospheric BOV
Why isn't it tuneable ? I was always under the impression you can drop the fuel tables to control the amount of fuel and air pumped in through the car to safely get away from the half second rich moment after spool ?
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