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Admiral Ackbar the 1st
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15,666 Posts
Which GFB - some (most?) of theirs come with adjustable recirculation. If it has that, and is adjusted well for it (all recirc or at least mostly), I'd be unconcerned totally.
 

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2 Posts
I have a 2015 wrx and has a stock turbo and an AEM aftermarket intake. Is it ok to get a aftermarket blow off valve like HKS, Greddy or perrin without having it tuned?
 

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Master linguitist
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10,019 Posts
No, it means that your car needs a bypass valve not a blowoff valve. It doesn't matter how you tune it. The engine management being mass air flow based does not work correctly with blow off valves.
 

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Super Modulator
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19,258 Posts
Please read the stickies. /Thread


EDIT: Wow, it's like learning how to moderate all over again with this change
 

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Super Modulator
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19,258 Posts
If this wasn't found originally, moving his thread here won't help.
Sure it will. By merging the thread, he's now subscribed to this thread.

This is standard practice Padawan ;)
 

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11 Posts
So i've been reading that a bov is not ok due to it being post maf, what if it was plumbed pre maf, would that make the car lean out to much?
 

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Friendly Neighborhood Spider-Admin
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48,687 Posts
Are BOV's still a thing? I can't speak for the more recent cars, but it seems like we squashed the validity of needing/wanting one pretty thoroughly on the GD cars. Or at least, that was my perception.
 
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