Bov - Ne1 Knw Nethng Bout These?

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mvandepas

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Hey! After a bit of help here, I have a lancer gsr... auto :yuck: and am considering getting a bov for it. Im all ok with the mechanics with the bov just not to sure on the sound side of things. I hear that they make the same sound whether theyre on a manual or auto.... which is fine. My question is.... I dont want the traditional "HISS" sound to come from it. I have heard a few vehicles where their BOV's make more of a "purr" sound, and it sounds more like a well-tuned subaru's exhaust than a high pitched hiss. Anyone know what Im on about or am I just talking out my a**?

Basically I want to know if these BOV's have a special name or something?
 
Hm... I never heard that kind of BOV.

You should go check out evolutionm.net. I'm sure there's more information there.
 
mvandepas
Hey! After a bit of help here, I have a lancer gsr... auto :yuck: and am considering getting a bov for it. Im all ok with the mechanics with the bov just not to sure on the sound side of things. I hear that they make the same sound whether theyre on a manual or auto.... which is fine. My question is.... I dont want the traditional "HISS" sound to come from it. I have heard a few vehicles where their BOV's make more of a "purr" sound, and it sounds more like a well-tuned subaru's exhaust than a high pitched hiss. Anyone know what Im on about or am I just talking out my a**?

Basically I want to know if these BOV's have a special name or something?
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Wow.
 
Translation: "Blowoff Valve: Does Anyone know anything about these?"

:) Just to Clarify for Non-AIM speakers.
 
mvandepas
Hey! After a bit of help here, I have a lancer gsr... auto :yuck: and am considering getting a bov for it. Im all ok with the mechanics with the bov just not to sure on the sound side of things. I hear that they make the same sound whether theyre on a manual or auto.... which is fine. My question is.... I dont want the traditional "HISS" sound to come from it. I have heard a few vehicles where their BOV's make more of a "purr" sound, and it sounds more like a well-tuned subaru's exhaust than a high pitched hiss. Anyone know what Im on about or am I just talking out my a**?

Basically I want to know if these BOV's have a special name or something?
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Ricer!
 
Ricer? My a**! If I was one of them my GSR wouldnt still be stock. If I was a ricer, id have put speed holes, bodykits, stupid-a** looking spoilers, neons, leds, mags and all that c*ap! No, im selling my car (coz its an auto) and the guy that wants it said he'll pay extra to get a BOV and didnt know c*ap about them. And because I also dont know c*ap about them, i need some help.
 
boombexus
Wow, exactly! Post 3 through 6, of 8 total, have no bearing on the subject what so ever.
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Post one had no bearing on the subject. The title was piss to begin with and it went downhill from there.
 
MrktMkr1986
Yes. Also, mvandepas if you're looking to modify your turbo, you might want to look into a manual boost controller. :dopey:
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ARGH! Whats wrong with everyone :crazy:

All I want to know is if theres a special name or brand of the BOV that makes a very subtle purr (like a cat.... yes A CAT PURR!) instead of the traditional hiss that conventional BOV's make.

And yes GSR's have turbos, ie 1800cc GSR and the 2000cc EVO GSR. And no I dont want more HP from my turbo, Id rather leave the engine and its components along otherwise Im bound to screw something up.

Cheers for all the comments though, however they're all useless and of no help. :scared:

Man, what do ya have to do to get some help around here?
 
M5Power
Use English?
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Use english? I dont think thats the problem... this thread's definately going downhill now.

The fact that the thread title can only be so long, I had no choice but to abbreviate the title. And why shoot me down, the title obviously made sense to you... so whatever language Im using... we are on the same level buddy.

I know... here's an idea... all the people who have nothing of value to say should go away (put extremely politely!).
 
Okay, theres - going to far - and then theres - oh **** weve gone to far. We're well past that point. This is especially for all of the forum members who are strictly limited to english as spoken in its correct context.

I have a vehicle. It has an engine (funny that!). It also has a turbo. A turbo is a device which has a basic function of forcing compressed air (ie oxygen) into the engine. The compression wheel inside the turbo pushes this air into the engine through a tube. When the turbo is no longer being used (due to the driver removing or reducing pressure on the acceleration pedal) the engine does not allow any more air from the turbo to get inside the combustion chamber. As a result there is compressed air in the tube between the turbo and the engine. Without the aid of a Blow Off Valve, this compressed air has no alternative than to exit back through the turbo, which in simple terms (i think simple terms are best for the "flamers" out there) is not good for the turbo. Hence we have this device called a blow off valve. In most cases vehicles have (as standard) a device similar to a blow off valve that dispurses this "excess" air back into the air intake just before the turbo. There are, however, blow off valves that can be purchased to replace the standard device that releases the compressed air into the atmosphere. Blow off valves can also have the added ability to produce a sound as a result of the air being released. The sound is best known to make a "hiss" as the compressed air is released. My question to the forum readers of www.gtplanet.net was that, over here in New Zealand, in specific Hamilton, there have been a number of vehicles with blow off valves which make a rather strange sound compared to the traditional Blow off Valves. The sound produced is more of a "purr" sound similar to that of a cat (a cat is a animal by the way). My question goes further into establishing if any of the forum readers of this website would have had this same experience with encountering this sound. Unfortunately most of the forum readers (with the exception of a few decent people) are complete dumb*s*es and have nothing better to do than to find something funny (in their opinion) to harass a forum executor about. The result of these idiots is that we get a **** load of forums that are (I am generalising here for all those politically correct) about 100 times longer than they need to be.

So guys, what would you prefer in the future? A big long unesecary explanation like that or do you actually think you could handle having to read a bit of abbreviation every now and then, just to speed up the whole process? I guess not.
 
mvandepas
I know... here's an idea... all the people who have nothing of value to say should go away (put extremely politely!).
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:rolleyes: Anyway... there is no special name for a BOV that makes the noise you are looking for. A blowoff valve is a blowoff valve. HOWEVER, whether or not there is a specific manufacturer that makes a BOV that makes the sound you're after, I'm not entirely sure.

Be aware, though:

One problem you will encounter with BOV's is that the MAF sensor will cause the engine management system to "think" that the air will go into the engine and in turn will release an appropriate amount of fuel for it. However, a BOV will vent this air out before it gets to the injectors. This in turn, this will result in unburned fuel to escape into the exhaust system. It is unburned fuel exploding in the exhaust system -- not something you want to have on a car that is used as a daily driver.
 
Did you find something similar to what you are looking for in the link I provided above?

You certainly don't have to resort to name calling. May I suggest that you do a tad bit of editing to #18 post. :)
 
mvandepas
So guys, what would you prefer in the future? A big long unesecary explanation like that or do you actually think you could handle having to read a bit of abbreviation every now and then, just to speed up the whole process? I guess not.
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He said use proper English, not write an essay. If you wanted to abbreviate your title, you could've said "BOV Question", since you further went to detail your question in the actual post.

However, my previous statement still stands. Putting a BOV on a bone stock vehicle just to have a loud noise - No matter what the noise sounds like - Is rice. Why not just by the exhaust insert that makes the noise? It'll net the same thing, and will probably cost less.
 
However, my previous statement still stands.
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But it still stands as entirely off topic. He doesn't care for your opinion on whether you consider it rice or not, he just cares if you try to answer his question. Either do that, or don't post here.
 
MrktMkr1986
Be aware, though:

One problem you will encounter with BOV's is that the MAF sensor will cause the engine management system to "think" that the air will go into the engine and in turn will release an appropriate amount of fuel for it. However, a BOV will vent this air out before it gets to the injectors. This in turn, this will result in unburned fuel to escape into the exhaust system. It is unburned fuel exploding in the exhaust system -- not something you want to have on a car that is used as a daily driver.
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That's why you install the BOV, Pre-MAF. Otherwise your engine will run rich and probably stall out.
 
If I were you I'd buy an aftermarket filter setup, 3" catback (turbo back if you have the coin) exhaust (with appropriate mufflers and resonators) and leave the stock BOV.

BOV nowadays are just a showoff thing really, I would personally keep a bov as discreet as possible if I owned a turbo car.
 
boombexus
That's why you install the BOV, Pre-MAF. Otherwise your engine will run rich and probably stall out.
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Ah, I get it now. 💡 I thought that was what the bypass valve (BPV) was for. I'll get it one of these days. :dopey:
 
mvandepas
Ricer? My a**! If I was one of them my GSR wouldnt still be stock. If I was a ricer, id have put speed holes, bodykits, stupid-a** looking spoilers, neons, leds, mags and all that c*ap! No, im selling my car (coz its an auto) and the guy that wants it said he'll pay extra to get a BOV and didnt know c*ap about them. And because I also dont know c*ap about them, i need some help.
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If you are putting in a BOV just to please a perspective buyer - what do you care what it sounds like?
 
mvandepas, blow off valve sound varies by the BOV's outlet and inlet designs as well as the spring tension of the unit and boost level it needs to bleed off. Some sound sharp and quick like the movies, some are fluttery, some are lower tones and lazy sounding.

BOV tone can also be controlled by the driver as in when you let off the throttle, you can keep the throttle partially open and actually change the sound of the valve.

Alot of what you are hearing is compressor surge, anything that sounds like WRC cars is compressor surge..

My car only blows off properly (meaning it's the compressed air in the charge pipe being blown off) under heavy load and over 5psi or so..

When a BOV spring is very hard (meant for real high boost), they typically stutter before opening fully. That is the boost spiking prior to the spring opening/compressing... it's not always compressor surge.... but it does sound fluttery.

I know the HKS sequential was famous for that and the newer SS has a higher factory spring tension than the original sequential. Low boost on a bov like that (SS with <8 psi) can often mean it doesn't open.
 
MrktMkr1986
Be aware, though:

One problem you will encounter with BOV's is that the MAF sensor will cause the engine management system to "think" that the air will go into the engine and in turn will release an appropriate amount of fuel for it. However, a BOV will vent this air out before it gets to the injectors. This in turn, this will result in unburned fuel to escape into the exhaust system. It is unburned fuel exploding in the exhaust system -- not something you want to have on a car that is used as a daily driver.
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If it's set up right i dont think that should be to big a problem. The fuel delivery is determined by the richness of oxygen in the intake as well as throttle position and other factors. The BOV opens when the throttle closes so the engine should allready be starving fuel at that point.
 
Well I have a Greddy Type RS BOV kit and it sounds pretty damn mean. However you are talking about not having the traditional sound, so I would go with maybe the HKS SSQV.
 

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