2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

BOV vented to atmosphere....

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Old Sep 25, 2005 | 01:03 PM
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BOV vented to atmosphere....

How can you do this without loosing any performance or damaging anything? I know there is a right way of doing this but when my intercooler line was loose it was making a very nice psshh sound....i just want the same thing in the safe and correct version!
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Old Sep 25, 2005 | 01:06 PM
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there is no correct way of doing it to an FC, it causes a vacuum leak and a shitty idle.
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Old Sep 25, 2005 | 01:20 PM
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damn!
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Old Sep 25, 2005 | 01:20 PM
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The proper way is run a stand alone EMS and use a aftermarket BOV.

The next wrong way but wont realy harm anything is just run a aftermarket BOV and vent it.
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Old Sep 25, 2005 | 03:11 PM
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damn x2! I was hoping I could find a free way of getting that bov sounds without having to spend money lol!
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Old Sep 25, 2005 | 03:14 PM
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The home depot way to vent your stock BOV to atmosphere is to run a one-way check valve in line with the bov, so it only vents pressure. This was a pretty popular mod back in the day (god only knows why),. Some people reported that with this mod, thier BOV sounded like a locomotive on crack. Of course Iceblue knew this, because he has been a rotary god for about 10 years, but he neglected to tell you.
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Old Sep 25, 2005 | 03:24 PM
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Originally Posted by J-Rat
The home depot way to vent your stock BOV to atmosphere is to run a one-way check valve in line with the bov, so it only vents pressure. This was a pretty popular mod back in the day (god only knows why),. Some people reported that with this mod, thier BOV sounded like a locomotive on crack. Of course Iceblue knew this, because he has been a rotary god for about 10 years, but he neglected to tell you.
What did it sound like? Not a pshhh sound? Do you mean it sounded good or bad?

If good, i want more info to attemp it ....
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Old Sep 25, 2005 | 03:29 PM
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I couldnt say, I never attempted this mod..
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Old Sep 25, 2005 | 04:29 PM
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Puting words in my mouth again huu.
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Old Sep 25, 2005 | 05:27 PM
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Originally Posted by iceblue
Puting words in my mouth again huu.
Nope, just telling the man that there are other options if you just HAVE to open vent your BOV.
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Old Sep 27, 2005 | 03:49 PM
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i jnust picked up a FD BOV and a one way valve from kevin along with a AFM adaptor for TID
Five dolla make ya holla!

Kevin had 3 nails/screws in the one way valve because he said the thing inside would flutter around too much and create a vacuum leak.
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Old Sep 27, 2005 | 03:54 PM
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Originally Posted by iceblue
The proper way is run a stand alone EMS and use a aftermarket BOV.
Exactly why would you need a standalone to run an open vented BOV?
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Old Sep 27, 2005 | 05:27 PM
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Yes, please elaborate. I have a BOV open vent right now, I'd like to know if this is somehow hurting the performance of my car. Up until now, I had never heard anything like that happening, unless maybe on some newer turbocharged vehicles (emissions related issues, going into limp mode, etc.)
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Old Sep 27, 2005 | 05:35 PM
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Originally Posted by Aaron Cake
Exactly why would you need a standalone to run an open vented BOV?
I'm pretty sure he means to cancel the big rich spot when it vents.
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Old Sep 27, 2005 | 05:42 PM
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does that big rich spot always occur? my friend has a greddy FMIC and BOV and I don't know if this is happening to him or not. He has an Rtek and SAFC, but obviously not standalone.
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Old Sep 27, 2005 | 05:45 PM
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Originally Posted by 1987RX7guy
I'm pretty sure he means to cancel the big rich spot when it vents.
Ah, I have noticed that bounce on my AFR gauge, just thought it was normal.
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Old Sep 28, 2005 | 08:53 AM
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Originally Posted by 1987RX7guy
I'm pretty sure he means to cancel the big rich spot when it vents.
Seems like an aweful lot of money to spend on a non-problem. But my original beef with that statement was that he basically said you can't run an open vented BOV without a standalone at all....Obviously not even remotely close to true.
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