BOV rant
personally i LOVE the phhhssss sound, ever since i heard one on the movie the move fast and the furious (yes i know lol sry 4 that rice part) thats when i heard my 1st bov sound, i think there is nothing sexier (espesally on the boxer engin) a nice deep tone exhust (i have an HKS hi-power) and a bov, (also an HKS bov i have). Flame me if u want, hate me, call me a ricer etc But i think, if u have some nice power mods, such as: dp, up, tbe, tune, and a lil show such as rims, lowerd, tint maybe even cf hood etc, the bov falls into place. but hey thats just me, and i know for a fact, a lot of people, also like me, love the PSSHHHH sound =P
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From: Seattle WA.
Car Info: 05 WRX 4EAT (VF34'd and FMIC'd)----sold :(
^^^
I agree. I have the Hi-Power too and it's great. Love the sound.
I have NOT been hassled by cops or anyone else. I don't see why I/or anyone else with a "canister style" exhaust would, because Subaru's have more than 200HP, unlike Hondas. So it's more of a performance benefit than just show.
And BOV's.......... I'm not gonna lie, I like the sound.
The thing I don't like, is when guys put them on their GTI's or 89 Eclipse and ride around with their head held hi, run'in 8 psi!!! OMGHI2U
I agree. I have the Hi-Power too and it's great. Love the sound.
I have NOT been hassled by cops or anyone else. I don't see why I/or anyone else with a "canister style" exhaust would, because Subaru's have more than 200HP, unlike Hondas. So it's more of a performance benefit than just show.
And BOV's.......... I'm not gonna lie, I like the sound.
The thing I don't like, is when guys put them on their GTI's or 89 Eclipse and ride around with their head held hi, run'in 8 psi!!! OMGHI2U
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Joined: Jan 2006
Posts: 98
From: New York
Car Info: 2005 Subaru
I heard BOV gives you boost leak. . . on top end?
I have BOV.. I noticed it.. when I finally kept up with
my friends M3 on top end. . . maybe there are benefit.. but then again, something probably is not good either....but I still like it.
fenderstat066.. maybe the reason you're angry about this is because you want to buy one, but its just too expensive and you think its not woth buying.... but you still want it!... just a thought.
I have BOV.. I noticed it.. when I finally kept up with
my friends M3 on top end. . . maybe there are benefit.. but then again, something probably is not good either....but I still like it.
fenderstat066.. maybe the reason you're angry about this is because you want to buy one, but its just too expensive and you think its not woth buying.... but you still want it!... just a thought.
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Posts: 871
Originally Posted by fenderstrat066
First off my intentions are not to insult people who have BOV's installed (i wouldnt be very popular if i did)but my reasons for *****ing here is to see how you guys feel about this insanely popular modification........- I have one big thing thats been bothering me about car tuners. BOV's for some reason, everything about them makes me wanna sit through an air supply concert instead of hearing one. First off i have never seen proof where a bov (especially on a wrx) has gotten any gains in power over the bypass valve unless the boost is cranked very high. Second i thought subaru's were supposed to be low key sports cars (arguable with the STI's wing and hood scoops) and thats one thing i've always loved about them. But when you hear that annoying PSSSHHH sound from hunderds of feet away its just begging cops to come get you. How can vendors charge upwards of 200 even 300bucks for your turbine wheel to lose momentum and have to build back up after shifting. Am i just talking out of my *** here or does this seem worse than the fartcan fad? (at least you can pick one up at walmart for $30) I actually wanna hear what u guys think about this so please let me know.
Ok, admittedly, I kinda like the "PSHHHHT!" sound. I just think the novelty would wear off quite quickly during the day to day grind. A stock STi has a nice little "sneeze" which I really like, but sometimes wish it were juuuuuust a tad louder. It just makes me all giddy! LOL! My wife'll be in the car and I'll be like, "Shhhhh! Shhhhhh! Listen!" She'll just say, "I'M NOT SHUTTING UP SO YOU CAN HEAR THAT GOOFY LITTLE PSSSSHT SOUND (that's the problem....women never shut up anyway
)"Oh yes, and touching back on Air Supply again. I was on vacation and heard that song, "I'm all out of love, I'm so lost without you" and started crying because I missed my STi. I was lost without it.
And of course, I'm kidding about that last statement.
Last edited by Sinister Subaru; Jul 28, 2006 at 04:35 AM.
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Posts: 871
Originally Posted by I am imprezed
Your gonna love this video.
http://videos.streetfire.net/search/...daf8540a2a.htm
No comment on the post./
http://videos.streetfire.net/search/...daf8540a2a.htm
No comment on the post./
Thread Starter
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Joined: Dec 2005
Posts: 236
From: Ellenville, Ny
Car Info: 2004 Wrx
Believe me i do not want to buy a bov. Im a tuner with a budget and if i spend money on my engine it better give me hp or torque. My main style of racing is snow rally though so power mods arent important (safety equiptment, tires, brakes, suspension) are most key for my racing. I didnt say people with bov's are ricers but im not saying their not either. If you have the money to spend on it, nobody's stopping you but stop putting that on your MOD list as if it helps you at all, me and someone earlier in the thread explained that if anything it would hurt your performance. THE ONLY TIME A BOV COULD BE USEFUL IS IF YOUR BOOST IS CRANKED TO 19+PSI AND YOU DONT WANT TO BLOW AN INTERCOOLER TUBE OR SOMETHING NO EXCEPTIONS!
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I just did a snorklectomy and added a K&N Typhoon on my 06WRX. I can now hear the BTV similarly to a BOV. Although BOV's are not a necassary mod, they do help with airflow. Good airflow = good thing. Maybe not more HP or torque, but it cant be bad to have a more efficient airflow.
Originally Posted by 06WRX4ME
Although BOV's are not a necassary mod, they do help with airflow. Good airflow = good thing. Maybe not more HP or torque, but it cant be bad to have a more efficient airflow.
Edit:
Better yet no response necessary.
Last edited by ipozestu; Jul 28, 2006 at 09:27 AM.
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They take the air from the turbo housing and send it out the BOV or BPV instead of back through the tubro.
I may be wrong, but that seems like a good thing to me because if the turbo is spooling toward the exhaust and the gas pushes away from the exhaust the turbo will have excess force on the bearings which is not good.
I could be wrong though, but it just makes sense to me looking at the physics of it.
I may be wrong, but that seems like a good thing to me because if the turbo is spooling toward the exhaust and the gas pushes away from the exhaust the turbo will have excess force on the bearings which is not good.
I could be wrong though, but it just makes sense to me looking at the physics of it.
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Here's the proof.
If BOV's / BPV's were not a good idea...then why would every turbo car come with one?
The only turbo'd car that came from the factory with out a BOV that I can recall was the 1988-1991 Nissan Silvia K's with the CA18DET engine. When the SR20DET engine came out, there was a stock BOV mounted on the side mounted intercooler. Nissan had learnt their lesson.
Whether or not you need to change out or upgrade it is the owner of the car's decision, and based on the exsisting modifications to the car. At a certain point the OEM BOV will start to leak under boost, costing you power.
There are however, no "power gains" associated with the addition of a more performance oriented BOV. It is just there to prevent compressor surge and help to prolong the life of the turbo.
I used to work on Seawater pumps onboard a Navy Destroyer.
They are actually big turbos, feed by saltwater instead of air.
The same principle applies. These pumps constantly had issues with reverse rotation, which could be considered compressor surge, there were no (I guess) "Flush Off Valves" on these pumps, but the principle of preventing the compressor surge is the same.
If the inlet pressure dropped on the sea water pump, it would cause the impreller blades in the pump (similar to the turbo's impeller blades) to slow (this is compressor surge) or stop (damaging the pumps seals), which is bad.
This is my experience on the subject. Probably more than some people have with them considering I have been playing with Turbo'd cars since 1995.
If BOV's / BPV's were not a good idea...then why would every turbo car come with one?
The only turbo'd car that came from the factory with out a BOV that I can recall was the 1988-1991 Nissan Silvia K's with the CA18DET engine. When the SR20DET engine came out, there was a stock BOV mounted on the side mounted intercooler. Nissan had learnt their lesson.
Whether or not you need to change out or upgrade it is the owner of the car's decision, and based on the exsisting modifications to the car. At a certain point the OEM BOV will start to leak under boost, costing you power.
There are however, no "power gains" associated with the addition of a more performance oriented BOV. It is just there to prevent compressor surge and help to prolong the life of the turbo.
I used to work on Seawater pumps onboard a Navy Destroyer.
They are actually big turbos, feed by saltwater instead of air.
The same principle applies. These pumps constantly had issues with reverse rotation, which could be considered compressor surge, there were no (I guess) "Flush Off Valves" on these pumps, but the principle of preventing the compressor surge is the same.
If the inlet pressure dropped on the sea water pump, it would cause the impreller blades in the pump (similar to the turbo's impeller blades) to slow (this is compressor surge) or stop (damaging the pumps seals), which is bad.
This is my experience on the subject. Probably more than some people have with them considering I have been playing with Turbo'd cars since 1995.
Last edited by RedStage; Jul 28, 2006 at 10:02 AM.
Originally Posted by RedStage
Here's the proof.
If BOV's / BPV's were not a good idea...then why would every turbo car come with one?
The only turbo'd car that came from the factory with out a BOV that I can recall was the 1988-1991 Nissan Silvia K's with the CA18DET engine. When the SR20DET engine came out, there was a stock BOV mounted on the side mounted intercooler. Nissan had learnt their lesson.
Whether or not you need to change out or upgrade it is the owner of the car's decision, and based on the exsisting modifications to the car. At a certain point the OEM BOV will start to leak under boost, costing you power.
There are however, no "power gains" associated with the addition of a more performance oriented BOV. It is just there to prevent compressor surge and help to prolong the life of the turbo.
I used to work on Seawater pumps onboard a Navy Destroyer.
They are actually big turbos, feed by saltwater instead of air.
The same principle applies. These pumps constantly had issues with reverse rotation, which could be considered compressor surge, there were no (I guess) "Flush Off Valves" on these pumps, but the principle of preventing the compressor surge is the same.
If the inlet pressure dropped on the sea water pump, it would cause the impreller blades in the pump (similar to the turbo's impeller blades) to slow (this is compressor surge) or stop (damaging the pumps seals), which is bad.
This is my experience on the subject. Probably more than some people have with them considering I have been playing with Turbo'd cars since 1995.
If BOV's / BPV's were not a good idea...then why would every turbo car come with one?
The only turbo'd car that came from the factory with out a BOV that I can recall was the 1988-1991 Nissan Silvia K's with the CA18DET engine. When the SR20DET engine came out, there was a stock BOV mounted on the side mounted intercooler. Nissan had learnt their lesson.
Whether or not you need to change out or upgrade it is the owner of the car's decision, and based on the exsisting modifications to the car. At a certain point the OEM BOV will start to leak under boost, costing you power.
There are however, no "power gains" associated with the addition of a more performance oriented BOV. It is just there to prevent compressor surge and help to prolong the life of the turbo.
I used to work on Seawater pumps onboard a Navy Destroyer.
They are actually big turbos, feed by saltwater instead of air.
The same principle applies. These pumps constantly had issues with reverse rotation, which could be considered compressor surge, there were no (I guess) "Flush Off Valves" on these pumps, but the principle of preventing the compressor surge is the same.
If the inlet pressure dropped on the sea water pump, it would cause the impreller blades in the pump (similar to the turbo's impeller blades) to slow (this is compressor surge) or stop (damaging the pumps seals), which is bad.
This is my experience on the subject. Probably more than some people have with them considering I have been playing with Turbo'd cars since 1995.
No bodys asking for proof that BOV's add power by increasing air. They simply do not. If you read my original explanation of BPV/BOV's you would understand. No statement was made about weather they should or should not be there, simply put they have to be there. If you have one that is leaking, you have a part that is inadequate for the aplication.