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12-09-2020, 08:57 PM | #1 |
Scooby Newbie
Member#: 464522
Join Date: Mar 2017
Location: Southern California
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COBB LE BPV vs COBB XLE BPV vs stock BPV
Hi everyone,
I'm getting my 2020 STi tuned shortly with mostly COBB stage 1+ mods plus a few more preventative mods (with the boost increased to around 18psi). I really want the "whoosh" sound of the turbo and the "psshh" sound as the air is released. I understand with my COBB SF intake (with the COBB Airbox), I can hear that quite well, however I've heard that the COBB BPV will make it louder and has a distinctive turbo flutter sound, even though I'm going to be setting it to 100% recirculation. So my question is does anyone have either of the COBB BPV's and is it louder than the stock BPV when equipped with the COBB SF intake? Also, is the COBB LE BPV louder than the COBB XLE BPV and which one would be better? I'm just looking for the loudest turbo sounds since this won't have any performance gain.
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12-09-2020, 09:03 PM | #2 |
Scooby Specialist
Member#: 495950
Join Date: Jan 2019
Chapter/Region:
South East
Location: Augusta, GA
Vehicle:2011 WRX WRB |
i had the xle on my 2011 wrx and it sounded the same as stock to me with the cobb intake. only difference is that the cobb will hold more boost and not leak
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12-09-2020, 09:08 PM | #3 |
Scooby Newbie
Member#: 464522
Join Date: Mar 2017
Location: Southern California
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Thanks, yeah for me it's just the sound I'm looking for on my STi. I want a louder, more distinct turbo flutter noise. But if the sound is the same as stock, I'll hold off on buying the COBB BPV.
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12-10-2020, 09:19 AM | #4 |
Scooby Specialist
Member#: 193940
Join Date: Nov 2008
Location: Philly
Vehicle:2004 WRX STI Black RalliSpec Shortblock |
I have the Forge BPV, it made all of those sexy sounds and holds boost all the way up to redline. Also it comes with 3 pressure springs that you can change out.
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12-13-2020, 10:46 PM | #5 | |
Scooby Newbie
Member#: 464522
Join Date: Mar 2017
Location: Southern California
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Quote:
Yeah I’ve heard good things about Forge BPV’s on STi’s, but I ended up going with the COBB LF BPV. |
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12-14-2020, 07:31 AM | #6 |
Scooby Newbie
Member#: 492422
Join Date: Oct 2018
Chapter/Region:
Tri-State
Location: North Jersey
Vehicle:2011 STI |
I just ordered a Cobb LF bpv to replace my leaking turbosmart valve. I guess ill update once i have it on the car.
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12-15-2020, 02:50 AM | #7 |
Scooby Newbie
Member#: 464522
Join Date: Mar 2017
Location: Southern California
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12-16-2020, 03:09 PM | #8 |
Scooby Newbie
Member#: 492422
Join Date: Oct 2018
Chapter/Region:
Tri-State
Location: North Jersey
Vehicle:2011 STI |
I have an AEM CAI. Unfortunately alot of places are out of the cobb bpv so im going to have to wait 2 - 4 weeks before mine arrives.
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12-16-2020, 03:16 PM | #9 | |
Scooby Newbie
Member#: 464522
Join Date: Mar 2017
Location: Southern California
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Quote:
Yeah, I’m trying to get one as well. Problem is I might already have the car tuned by then. Do you need a re-tune if you’re just swapping a fully recirculating BPV with the stock one? |
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12-16-2020, 03:49 PM | #10 |
Scooby Specialist
Member#: 450713
Join Date: Jul 2016
Chapter/Region:
Tri-State
Location: Super bowl LII champs
Vehicle:2017 WRX Stage 3ish world rally blue |
I had to rebuild my Cobb LF bpv because they updated the springs and seals. They provided me the kit free of cost but it wasn't exactly reassuring to have to rebuild a brand new part a few months after install. Only way I found out about this was by perusing Cobb's website. No issues yet
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12-16-2020, 11:15 PM | #11 | |
Scooby Newbie
Member#: 464522
Join Date: Mar 2017
Location: Southern California
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COBB LE BPV vs COBB XLE BPV vs stock BPV
Quote:
That’s not comforting to know that it had to be rebuilt early on. I thought the COBB LE BPV was an improvement over the COBB XLE BPV and I went with COBB because they usually make good quality parts. Hopefully mine comes wit the updated springs and seals. Sorry to hear that you had to rebuild it, but at least they provided the kit free of cost. Last edited by ben_7; 12-17-2020 at 01:07 AM. |
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12-17-2020, 01:06 AM | #12 |
Scooby Newbie
Member#: 464522
Join Date: Mar 2017
Location: Southern California
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Just asking this question again, do you need a tune if you replace the stock STi BPV with an aftermarket BPV but set to 100% recirculation?
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12-17-2020, 09:21 AM | #13 |
Scooby Specialist
Member#: 193940
Join Date: Nov 2008
Location: Philly
Vehicle:2004 WRX STI Black RalliSpec Shortblock |
As long as it has the same spring rate, no need for a retune for a recirculation setup.
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12-17-2020, 09:32 AM | #14 |
Scooby Specialist
Member#: 450713
Join Date: Jul 2016
Chapter/Region:
Tri-State
Location: Super bowl LII champs
Vehicle:2017 WRX Stage 3ish world rally blue |
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12-17-2020, 10:08 PM | #15 |
Big Ron
Super Moderator Member#: 18062
Join Date: Apr 2002
Chapter/Region:
MAIC
Location: I can save you a ton of cash
Vehicle:on car parts so PM me b4 j00 buy |
You have done zero research on this topic. You will have issues and you aren't informed enough now to know what they are and the causes and the preventative maintenance associated with this modification. You need to circle back and start researching or get rid of this idea. This goes for all car modifications.
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12-17-2020, 10:31 PM | #16 |
Scooby Newbie
Member#: 464522
Join Date: Mar 2017
Location: Southern California
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12-17-2020, 10:31 PM | #17 |
Scooby Newbie
Member#: 464522
Join Date: Mar 2017
Location: Southern California
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12-17-2020, 10:38 PM | #18 | |
Scooby Newbie
Member#: 464522
Join Date: Mar 2017
Location: Southern California
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COBB LE BPV vs COBB XLE BPV vs stock BPV
Quote:
Actually I have done some research, and I believe I won’t have any issues because this is a simple install and lots of people have installed it. Which is why I started this thread, in order to initiate a helpful discussion around these BPV’s and the install process for anyone (including myself) interested in installing these BPV’s. While I’m not a Subaru expert, I do know that these cars run bad with BOV’s which is why I purchased a fully recirculated BPV with a COBB SF intake for the sound I desired. The reason I post on these forums is to get other owner’s experiences regarding the topic which an FAQ or article doesn’t provide. After all, that’s why we have forums don’t we? Isn’t this forum a place for Subaru enthusiasts to discuss topics on the cars they love? But when there are posts like the post you sent me, it actually makes someone not want to post and not use forums at all. For everyone who posted helpful responses, thank you! Last edited by ben_7; 12-17-2020 at 10:54 PM. |
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01-09-2021, 09:34 AM | #19 |
Scooby Newbie
Member#: 492422
Join Date: Oct 2018
Chapter/Region:
Tri-State
Location: North Jersey
Vehicle:2011 STI |
Ok guys so i finally got my Cobb LF bpv this week and installed it last night. Compared to my turbosmart 50/50 bov on full recirc, the Cobb bpv is louder in my opinion. Its definetly more active so to speak.
Its very possible that my turbosmart valve was just old worn and busted after all these years. None the less i am happy with the Cobb LF bpv. Last edited by Jay11STI; 01-09-2021 at 10:30 AM. |
01-09-2021, 10:28 PM | #20 | |
Scooby Newbie
Member#: 464522
Join Date: Mar 2017
Location: Southern California
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COBB LE BPV vs COBB XLE BPV vs stock BPV
Quote:
I just got my STi pro-tuned with my COBB LF BPV and paired with my COBB SF Intake, it’s loud and it sounds great! |
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01-10-2021, 01:04 PM | #21 | |
Scooby Specialist
Member#: 50072
Join Date: Dec 2003
Chapter/Region:
South East
Location: TN
Vehicle:2017 STI Blue |
Quote:
Edit: Nevermind, just read to the bottom and see that you were using a different model. |
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