The BOV Thread
Thread Starter
Pro
Joined: Jun 2011
Posts: 537
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From: Santa Maria California
The BOV Thread
I have a few questions for those of you familiar with the different BOV's. I am currently running the Turbosmart BOV that came with my A&A V3 Si kit. What is the difference between the Turbomart Valve and others like the Tial which is used on the ECS kits? What BOV do most forum members use and why??? Which BOV has the best sound? How do I know when I have my BOV adjusted correctly? If anyone has anything else to add concerning BOV's, jump in and give us your thoughts on the subject. I am wanting to learn as much as I can about the different models and options available. Thanks 
ISIS SUCKS FAT CHOAD
Joined: Oct 2008
Posts: 8,124
Likes: 53
From: Earth, United States
I have a few questions for those of you familiar with the different BOV's. I am currently running the Turbosmart BOV that came with my A&A V3 Si kit. What is the difference between the Turbomart Valve and others like the Tial which is used on the ECS kits? What BOV do most forum members use and why??? Which BOV has the best sound? How do I know when I have my BOV adjusted correctly? If anyone has anything else to add concerning BOV's, jump in and give us your thoughts on the subject. I am wanting to learn as much as I can about the different models and options available. Thanks
The Bypass valve is used to help prevent compressor surge. Compressor surge is bad and will destroy a blower or a turbo.
There's all sorts of $hit on the Internet on this very topic. If you want a noise maker then remove the filter thats on your A&A turbosmart valve. It will be louder. the Tial Q 50 mm valve or procharger big red are popular choices for upgrades to the A&A turbosmart valve.
Thread Starter
Pro
Joined: Jun 2011
Posts: 537
Likes: 3
From: Santa Maria California
The Bypass valve is used to help prevent compressor surge. Compressor surge is bad and will destroy a blower or a turbo.
There's all sorts of $hit on the Internet on this very topic. If you want a noise maker then remove the filter thats on your A&A turbosmart valve. It will be louder. the Tial Q 50 mm valve or procharger big red are popular choices for upgrades to the A&A turbosmart valve.
There's all sorts of $hit on the Internet on this very topic. If you want a noise maker then remove the filter thats on your A&A turbosmart valve. It will be louder. the Tial Q 50 mm valve or procharger big red are popular choices for upgrades to the A&A turbosmart valve.
Is there anyone out there currently running their Turbosmart Plumb Back BOV without the filter supplied by A&A?
Last edited by RaW Z06; Mar 25, 2012 at 04:27 PM.
ISIS SUCKS FAT CHOAD
Joined: Oct 2008
Posts: 8,124
Likes: 53
From: Earth, United States
Thread Starter
Pro
Joined: Jun 2011
Posts: 537
Likes: 3
From: Santa Maria California
Don't know how I missed that.....
Thanks MVP
Tech Contributor
Joined: Apr 2007
Posts: 10,924
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From: Forney Texas
Not only do we need a bypass valve for compressor surge prevention, but it also completely bypasses the supercharger and draws ambient air through the intercooler when not in boost, thus keeping the intercooler from getting heat soaked. This should increase the efficiency of the system as well.
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Instructor
Joined: Nov 2008
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From: Austin Texas
I removed my filter on my turbosmart BOV awhile back just to see if it was going to make a difference on the sound. Cruising around on low boost it might have been a little louder but not much though, during WOT pulls on the dyno it was much louder but chances are I wouldn't hear it anyways while driving. It's a great BOV by all means, works great for the stealth approach. But if your wanting something much louder than a swap is needed to a Tial or Big Red I believe.
Thread Starter
Pro
Joined: Jun 2011
Posts: 537
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From: Santa Maria California
Not only do we need a bypass valve for compressor surge prevention, but it also completely bypasses the supercharger and draws ambient air through the intercooler when not in boost, thus keeping the intercooler from getting heat soaked. This should increase the efficiency of the system as well.
Last edited by RaW Z06; Mar 25, 2012 at 11:31 PM.
Le Mans Master
Joined: Aug 2002
Posts: 8,472
Likes: 38
From: Houston TX
St. Jude Donor '11
Not only do we need a bypass valve for compressor surge prevention, but it also completely bypasses the supercharger and draws ambient air through the intercooler when not in boost, thus keeping the intercooler from getting heat soaked. This should increase the efficiency of the system as well.
Tech Contributor
Joined: Apr 2007
Posts: 10,924
Likes: 78
From: Forney Texas
Mmmm I have to disagree Bret. A BOV in a centrifugal setup should never suck air in. It should always be blowing out. It should be open until just before passing atmospheric pressure. Open at idle, open in decel, open at cruise, and all the time it's blowing out because the blower is trying to move more air than the engine can injest.
Le Mans Master
Joined: Feb 2007
Posts: 6,674
Likes: 57
From: Mt Pleasant, TN
Mmmm I have to disagree Bret. A BOV in a centrifugal setup should never suck air in. It should always be blowing out. It should be open until just before passing atmospheric pressure. Open at idle, open in decel, open at cruise, and all the time it's blowing out because the blower is trying to move more air than the engine can injest.
It is never open unless its pushing air out. Yes, on both of my previous cars I never ran the filter. But if not running the filter make sure its not pointed straight up, if the car sits for long periods of time after being washed or if it sits in the rain for long periods of time water can get in there and corrode the BOV and it will get stuck shut. Obviously extreme case, but Ive seen it happen once. Pointed sideways its not an issue.
Last edited by bullitt4110; Mar 26, 2012 at 03:27 AM.
Thread Starter
Pro
Joined: Jun 2011
Posts: 537
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From: Santa Maria California
Thread Starter
Pro
Joined: Jun 2011
Posts: 537
Likes: 3
From: Santa Maria California
Yuck!
Could it be small pieces of rubber tubing that connects the supercharger to the intercooler? The inside of the Rubber tubing is the same orange color........
Last edited by RaW Z06; Mar 26, 2012 at 01:44 PM.
Instructor
Joined: Mar 2010
Posts: 125
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From: Dundalk MD
I believe the debris has to come from before the BOV. I have to wait a while to inspect further but Im hoping these did not come from the coupler at the inlet of the S/C, go throught the S/C and end up in the filter.