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01-08-2014, 01:28 PM | #651 |
Scooby Newbie
Member#: 344130
Join Date: Jan 2013
Location: Houston, TX
Vehicle:2013 WRX Hatch DGM |
Thanks for the writeup Dave. I am completely new here, and just read this entire thing, as well as Unabomber's FAQ's. It seems a LOT of posters here spouting off about how horrible BOVs are, didn't even take the time to read anything!
I do have one question though, that I haven't seen addressed anywhere where BOVs/BPVs are being discussed, is that the BPV takes the air from between the compressor and the engine, and dumps it before the compressor, after the MAF sensor. The piping leading up to the compressor does not have any type of backflow prevention (is open to the atmosphere at the filter), so when the air enters (from the BPV), it has 2 choices: go to the compressor, which is now only running on momentum, or go to the atmosphere. Air will take the path of least resistance and flow mostly toward the atmosphere, and back out apast the MAF sensor (so that already metered air idea doesn't hold much girth with me, at the moment). Has anyone looked at this? I am a marine systems designer/engineer, and have drawn up a diagram of the system to ask a few coworkers. The most benefit we can see, would be from recirculating the air, as that the air has already been through the intercooler, and cools some more as it joins again into the intake (expansive cooling), thus cooling the compressor/making it slightly more efficient. Sorry for the long post, and reviving an ancient thread, but I haven't seen anybody address this.
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01-24-2014, 04:08 PM | #652 |
Scooby Specialist
Member#: 330895
Join Date: Sep 2012
Chapter/Region:
NESIC
Location: Foxboro
Vehicle:2002 Impreza wrx blaze yellow |
love my go fast bits 50/50 blow off valve, lol its been on my car since 02!
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01-24-2014, 04:26 PM | #653 | |
Scooby Newbie
Member#: 102932
Join Date: Dec 2005
Chapter/Region:
Tri-State
Location: NJ
Vehicle:2014 STI Sedan SWP |
Quote:
I believe a speed density system changes the whole way injection works and that's why you can go either recirc/vented without issue. |
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01-27-2014, 02:43 PM | #654 |
Scooby Newbie
Member#: 369974
Join Date: Oct 2013
Chapter/Region:
South East
Location: Tampa, FL
Vehicle:2012 WRX WRB |
This might have already been answered, but I want to be 100% sure. I just bought the Perrin recirculating BOV for my 2012 WRX, and I was just wondering if I need a tune, or if theres anything I should do. And if anyone else has this BOV, what setting are you running on it? Softer, or harder? lol Thanks!
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03-03-2014, 10:44 PM | #655 |
Scooby Newbie
Member#: 307228
Join Date: Jan 2012
Chapter/Region:
MAIC
Location: pittsburgh, pa
Vehicle:04 wrx wagon silver |
no bov sleepin
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03-07-2014, 07:18 PM | #656 |
Scooby Newbie
Member#: 383902
Join Date: Mar 2014
Vehicle:2006 2.5i impreza |
can i ask what running rich means?
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03-08-2014, 02:28 PM | #657 |
Scooby Newbie
Member#: 383120
Join Date: Feb 2014
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Love it, great post.
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03-09-2014, 09:16 PM | #658 |
*** Banned ***
Member#: 384091
Join Date: Mar 2014
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Thanks for the write up
Thanks for the write up on this
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03-28-2014, 01:26 PM | #659 | |
Scooby Newbie
Member#: 275651
Join Date: Mar 2011
Chapter/Region:
South East
Location: Miami, Florida
Vehicle:2005 STI Blue |
Quote:
How come people have nightmares of being rich for a second ? Dont formula 1 cars change maps to run rich at certain times in a race to make more power ? not trying to be a jerk just like to know as much as i can. Last edited by Senio; 03-28-2014 at 01:53 PM. Reason: grammar |
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03-28-2014, 01:26 PM | #660 |
Scooby Newbie
Member#: 275651
Join Date: Mar 2011
Chapter/Region:
South East
Location: Miami, Florida
Vehicle:2005 STI Blue |
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03-29-2014, 10:20 AM | #661 | |
Scooby Specialist
Member#: 49362
Join Date: Nov 2003
Chapter/Region:
Tri-State
Location: Blackwood, South Jersey
Vehicle:2013 DGM STI Cobb Stg 2 |
Correct.
"Perfect stoichiometry" is a ratio of 14.7 air to 1 fuel. Anything above 14.7 is considered lean and below 14.7 considered rich. Quote:
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03-29-2014, 08:52 PM | #662 |
Scooby Newbie
Member#: 322540
Join Date: Jun 2012
Chapter/Region:
Tri-State
Location: Where the wild things are
Vehicle:2012 WRX TP Stage 2 |
I have a 2012 wrx tuned TP Stage 1 with a forge performance recirc valve. I noticed that that idle after installing it now drops much lower than before then picks up. It almost always happens when the car is given a little bit of gas then released. Little help!
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03-29-2014, 09:14 PM | #663 |
Scooby Specialist
Member#: 57064
Join Date: Mar 2004
Vehicle:2008 STi IAG built HTA86 E85 Kel272s Cos IM |
it's leakin
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03-29-2014, 09:21 PM | #664 |
Scooby Newbie
Member#: 322540
Join Date: Jun 2012
Chapter/Region:
Tri-State
Location: Where the wild things are
Vehicle:2012 WRX TP Stage 2 |
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04-05-2014, 09:46 AM | #665 |
Scooby Newbie
Member#: 386598
Join Date: Apr 2014
Chapter/Region:
South East
Vehicle:2004 Impreza WRX STI World Rally Blue |
Definitely a good read.
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04-13-2014, 04:57 AM | #666 |
Scooby Newbie
Member#: 387593
Join Date: Apr 2014
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Thanks !!
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04-14-2014, 03:48 PM | #667 | |
Scooby Specialist
Member#: 243616
Join Date: Apr 2010
Location: edmond, ok
Vehicle:2010 WRX 336/384 2006 STI 627/484 2015 BRZ |
Quote:
Are there any pros and cons to running a full recirc or just going atmospheric with speed density? Other than a simpler piping configuration. ...and noise. ? as in, does one do the job more efficiently than the other? again, SD... not MAF. |
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04-22-2014, 06:36 AM | #668 |
Scooby Newbie
Member#: 369585
Join Date: Sep 2013
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Good write up.
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04-24-2014, 07:22 PM | #669 |
Scooby Newbie
Member#: 386655
Join Date: Apr 2014
Chapter/Region:
SCIC
Vehicle:2008 Impreza WRX STI WHITE |
Thanks for the write-up... taking notes.
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04-24-2014, 11:05 PM | #670 |
Scooby Newbie
Member#: 388765
Join Date: Apr 2014
Chapter/Region:
SCIC
Location: SOCAL
Vehicle:2012 STI sedan DMG |
great FAQ!!!
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05-02-2014, 08:12 PM | #671 |
Scooby Newbie
Member#: 378890
Join Date: Jan 2014
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Anyone have thoughts on the GFB respons hybrid BOV? and right now I just have the sf intake cat back exhaust and running a stage 1 map on the AP.. I'm planning on replacing the tmic with a process west TMIC and I think this valve would be the best so I can set it up as a 100% recirculating or maybe do a 20% atmospheric and 80% recirculating what do you guys think
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05-11-2014, 12:42 AM | #672 |
Scooby Specialist
Member#: 387796
Join Date: Apr 2014
Chapter/Region:
NWIC
Location: Vancouver, WA
Vehicle:2015 WRX RED |
i think if you are deadset on a BOV get a full recirc one until you get a bigger turbo like Cobb XLE...
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05-11-2014, 01:14 AM | #673 |
*** Banned ***
Member#: 371737
Join Date: Oct 2013
Location: Boulder/Nashville
Vehicle:2003 **** Your Fake Parts |
TiAL for me every time.
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05-20-2014, 06:54 PM | #674 |
Scooby Newbie
Member#: 391392
Join Date: May 2014
Chapter/Region:
VIC
Location: Lower Mainland
Vehicle:1999 JDM WRX RA Ltd. Sonic Blue (74F) |
Just the info I needed, thanks!
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05-21-2014, 01:05 AM | #675 |
Scooby Newbie
Member#: 304811
Join Date: Dec 2011
Chapter/Region:
MWSOC
Location: Illinois
Vehicle:2006 WRX RED |
So I have a 2006 WRX with a cobb access port stage 1 install, I don't have a BOV and I am considering adding one. Any tips, good/bad experiences that you can share with a young person.
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