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Old 03-11-2014, 12:02 AM   #1
Sonorarex
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Default Question about bov block off plate

Iv been told the blocking the bov port on the intercooler is beneficial and can net up to a 35hp gain. Is there any truth to this?
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Old 03-11-2014, 12:05 AM   #2
shagfagon
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If that were the case don't you think subaru would have done that for you?

Whoever told you that literally has absolutely no idea what they are talking about and you should never go to that person for any advice about anything automobile related, ever.
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Old 03-11-2014, 12:31 AM   #3
Sonorarex
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The article that stated this was instant that by placing a plate you will keep all of the boost pressure created by your turbo going through your intake manifold. I do appreciate the advice before I took any foolish steps. I also have just received my new grimmspeed intercooler and was wondering if there is any need to install an air oil separator along with it
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Old 03-11-2014, 12:31 AM   #4
Sonorarex
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I believe it was a post on club Wrx
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Old 03-11-2014, 01:13 AM   #5
shagfagon
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Quote:
Originally Posted by Sonorarex View Post
The article that stated this was instant that by placing a plate you will keep all of the boost pressure created by your turbo going through your intake manifold. I do appreciate the advice before I took any foolish steps. I also have just received my new grimmspeed intercooler and was wondering if there is any need to install an air oil separator along with it
You need to read up on boost control and regulation. All of the "boost" goes through your manifold. The regulation of boost is controlled by your boost controller and waste gate, not the bpv/bov.

The excess "boost" flows through the bov/bpv when the throttle plate snaps shut (when you shift or lift off the throttle quickly)

If this boost was not diverted back into the intake or out into the atmosphere, (hence using a solid plate) the air would flow backwards and smash into the compressor wheel, rapidly stopping it or reversing its direction. This is horrific for the bearings and can accelerate wear by an extreme amount.

If you want more boost, which you can't safely do that without tuning and adding more fuel, you can:

1. Go to a tuner
2. Get an manual boost controller and raise your boost to the moon and then blow your motor
3. Go to a tuner
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Old 03-11-2014, 01:56 AM   #6
lookylookitzadam
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Bypass valve is essentially blocked off during a wot pull anyway.... A plate is a surefire way to get compressor surge though.
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Old 03-11-2014, 04:40 AM   #7
HinshawWRX
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No. Just no.

Do yourself a favor and pick up a book.
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Old 03-11-2014, 05:34 AM   #8
Loyale93
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And what is up with everyone asking about an AOS recently? That's gotta be the third or fourth time it's come up in the past week!
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Old 03-11-2014, 08:12 AM   #9
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Quote:
Originally Posted by Sonorarex View Post
The article that stated this was instant that by placing a plate you will keep all of the boost pressure created by your turbo going through your intake manifold. I do appreciate the advice before I took any foolish steps. I also have just received my new grimmspeed intercooler and was wondering if there is any need to install an air oil separator along with it
Quote:
Originally Posted by Sonorarex View Post
I believe it was a post on club Wrx
Well, there you have it! If it's on the internet, it must be true!

Don't read the article about the aliens probing your anus while you're asleep.
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