Original thread: http://www.mazdas247.com/forum/showthread.php?t=40956
A lot has been learned in the 5 years since the original turkey kill thread. V.2 will expand on some other options, as well as clarify some of the key points. I still to this day see new threads frequently, and get multiple PM's every week about this topic, so it is obvious that there is still a need for this info on here. I am hoping that this thread can be stickied so it will be easier for people to find the information they need, without searching endlessly or starting a new thread.
Here are the different ways you can set up your BOV and/or BPV system to get the best results:
1) BOV-only - You will get the maximum amount of sound when using the BOV-only method. It is key to relocate your MAF sensor to the cold pipe to eliminate stalling. I wasn't a fan of this approach before since the MAF wasn't designed for it, but a bunch of people have proved that it holds up fine over several years, so I will eat crow in this case. There doesn't seem to be one particular "correct" place to put the BOV in this setup. People have had good results with it on the hot pipe, while others have had success putting it on the cold pipe. Only thing to make sure of is that you put your valve BEFORE the MAF (airflow direction). Also, it probably isn't a good idea to have the MAF and the BOV super close to each other, as MAF's are notorious for hating turbulence.
2) BOV/BPV - This will typically be somewhat quieter overall than the BOV-only setup... the definite middle ground out of the 3 setups. There is no need to relocate the MAF sensor, and you can again put the valves wherever you like pretty much. For the overall best results, it is a good idea to put one valve on the hot pipe, and the other on the cold pipe, although it has been proven to work with both valves on the cold pipe. You can follow the guidelines in the original thread for this setup, the idea is pretty simple and not much has changed in that regard.
3) BPV-only - This is perhaps the trickiest to get set up properly, but in my opinion it's the best way to go as far as performance goes. The sound is much quieter depending on what intake you have. The key to setting this up correctly is to use 1" or larger in/out fittings for the valve, in place of the stock 5/8" fittings. You'll need a BPV that has 1" (or larger) in/out, a 1" (or larger) fitting on the charge pipe, and a 1" (or larger) fitting on the intake. Hook it all up with 1" or larger I.D. hose. With a full 1" pathway for the air to take, you can kill the turk while recirculating ALL of that lovely compressed air. This means no stalling, and the car won't run rich after a quick shift. I have found that it works best to put the fitting for the valve on the hotpipe with this setup. You can still relocate the MAF if you like, but follow the same guidelines listed above for the BOV setup (not too close & valve before MAF).
Universal keys for all of the setups -
1) Use the brake booster line (3/8") as a signal source for the valve(s). MAKE SURE to feel around for a bulge inside of the line towards the middle. This is a one way check valve inside of the line, designed to keep your brake booster unit from seeing any positive pressure. DO NOT remove this check valve! Put your tap on the passenger (engine) side of it. You can then run a new untapped line from the intake manifold to the wastegate. This is recommended for ALL msp's!
2) Run as little hose from the charge pipe to the valve inlet as possible. Ideally, you want the valve right at the fitting. The reason for this is simple... if you have a long hose running to the valve, it is (albeit only a little) more for the turbo to pressurize when building boost. Also, if you have a long hose there... when you vent, it is possible that the valve will only vent the pressure that has built up in the hose itself, meaning the air in the charge piping doesn't vent as much as it would with a shorter hose. Not venting the charge pipes sufficiently is what causes the surge in the first place, so this is something you definitely want to avoid. The hose from the valve to the intake can be a little longer if needed, but avoid making them ridiculously long as this can introduce some stalling trouble.
3) No kinks or harsh bends in the hose to and from the BPV. Simple here, you want the smoothest unrestricted path you can have.
............
I will try harder to update this thread with any new info. The old one is very outdated as far as pics/videos/info goes, and for that I apologize. Here are some newer pics and videos of different setups to give ideas to anyone who needs them (thank you to the people who's videos/pics I stole for this):
BOV only:
<object width="425" height="344"><param name="movie" value="http://www.youtube.com/v/PvrqaVEn5tk&hl=en"></param><embed src="http://www.youtube.com/v/PvrqaVEn5tk&hl=en" type="application/x-shockwave-flash" width="425" height="344"></embed></object>
BOV/BPV:
http://www.msprotege.com/members/505zoom/mov00540.mpg
BPV only:
<embed style="width:400px; height:326px;" id="VideoPlayback" type="application/x-shockwave-flash" src="http://video.google.com/googleplayer.swf?docId=969574600590172778&hl=en" flashvars=""> </embed>
If anyone has anything to add, please post up or PM me!
A lot has been learned in the 5 years since the original turkey kill thread. V.2 will expand on some other options, as well as clarify some of the key points. I still to this day see new threads frequently, and get multiple PM's every week about this topic, so it is obvious that there is still a need for this info on here. I am hoping that this thread can be stickied so it will be easier for people to find the information they need, without searching endlessly or starting a new thread.
Here are the different ways you can set up your BOV and/or BPV system to get the best results:
1) BOV-only - You will get the maximum amount of sound when using the BOV-only method. It is key to relocate your MAF sensor to the cold pipe to eliminate stalling. I wasn't a fan of this approach before since the MAF wasn't designed for it, but a bunch of people have proved that it holds up fine over several years, so I will eat crow in this case. There doesn't seem to be one particular "correct" place to put the BOV in this setup. People have had good results with it on the hot pipe, while others have had success putting it on the cold pipe. Only thing to make sure of is that you put your valve BEFORE the MAF (airflow direction). Also, it probably isn't a good idea to have the MAF and the BOV super close to each other, as MAF's are notorious for hating turbulence.
2) BOV/BPV - This will typically be somewhat quieter overall than the BOV-only setup... the definite middle ground out of the 3 setups. There is no need to relocate the MAF sensor, and you can again put the valves wherever you like pretty much. For the overall best results, it is a good idea to put one valve on the hot pipe, and the other on the cold pipe, although it has been proven to work with both valves on the cold pipe. You can follow the guidelines in the original thread for this setup, the idea is pretty simple and not much has changed in that regard.
3) BPV-only - This is perhaps the trickiest to get set up properly, but in my opinion it's the best way to go as far as performance goes. The sound is much quieter depending on what intake you have. The key to setting this up correctly is to use 1" or larger in/out fittings for the valve, in place of the stock 5/8" fittings. You'll need a BPV that has 1" (or larger) in/out, a 1" (or larger) fitting on the charge pipe, and a 1" (or larger) fitting on the intake. Hook it all up with 1" or larger I.D. hose. With a full 1" pathway for the air to take, you can kill the turk while recirculating ALL of that lovely compressed air. This means no stalling, and the car won't run rich after a quick shift. I have found that it works best to put the fitting for the valve on the hotpipe with this setup. You can still relocate the MAF if you like, but follow the same guidelines listed above for the BOV setup (not too close & valve before MAF).
Universal keys for all of the setups -
1) Use the brake booster line (3/8") as a signal source for the valve(s). MAKE SURE to feel around for a bulge inside of the line towards the middle. This is a one way check valve inside of the line, designed to keep your brake booster unit from seeing any positive pressure. DO NOT remove this check valve! Put your tap on the passenger (engine) side of it. You can then run a new untapped line from the intake manifold to the wastegate. This is recommended for ALL msp's!
2) Run as little hose from the charge pipe to the valve inlet as possible. Ideally, you want the valve right at the fitting. The reason for this is simple... if you have a long hose running to the valve, it is (albeit only a little) more for the turbo to pressurize when building boost. Also, if you have a long hose there... when you vent, it is possible that the valve will only vent the pressure that has built up in the hose itself, meaning the air in the charge piping doesn't vent as much as it would with a shorter hose. Not venting the charge pipes sufficiently is what causes the surge in the first place, so this is something you definitely want to avoid. The hose from the valve to the intake can be a little longer if needed, but avoid making them ridiculously long as this can introduce some stalling trouble.
3) No kinks or harsh bends in the hose to and from the BPV. Simple here, you want the smoothest unrestricted path you can have.
............
I will try harder to update this thread with any new info. The old one is very outdated as far as pics/videos/info goes, and for that I apologize. Here are some newer pics and videos of different setups to give ideas to anyone who needs them (thank you to the people who's videos/pics I stole for this):
BOV only:
<object width="425" height="344"><param name="movie" value="http://www.youtube.com/v/PvrqaVEn5tk&hl=en"></param><embed src="http://www.youtube.com/v/PvrqaVEn5tk&hl=en" type="application/x-shockwave-flash" width="425" height="344"></embed></object>
BOV/BPV:
http://www.msprotege.com/members/505zoom/mov00540.mpg
BPV only:
<embed style="width:400px; height:326px;" id="VideoPlayback" type="application/x-shockwave-flash" src="http://video.google.com/googleplayer.swf?docId=969574600590172778&hl=en" flashvars=""> </embed>
If anyone has anything to add, please post up or PM me!
