I was looking around google but I couldnt find out this question. I recently bought a xA stoc,k brand new 2005 and wanted to know if I could buy a blow off valve for it. (of course is manual/stick shift) Are there any requirements for it? Thanks.

...uh...yeah...a supercharger or turbo charger....


a Blow-Off Valve has an accual purpose, it doesn't just sound cool.

A BOV is just a big capacity valve that opens when there’s a strong manifold vacuum present. Well, that’s how all standard ones work, anyway. In fact, what the valve is designed to do is vent the pressure build-up that otherwise occurs between the closing throttle and the still-spinning turbo.

But if you want the valve to make lots of noise, install a whistle in its outlet. Seriously. It works...

http://us1.webpublications.com.au/static/images/articles/i21/2188_16lo.jpg


I hope that helps

You need a something to make that baby blow first....

I was looking around google but I couldnt find out this question. I recently bought a xA stoc,k brand new 2005 and wanted to know if I could buy a blow off valve for it. (of course is manual/stick shift) Are there any requirements for it? Thanks.

:rofl: :rofl: :rofl: :no:

http://members.rennlist.com/adamation/assclown.jpg
http://members.rennlist.com/adamation/iq%20chart.jpg

...uh...yeah...a supercharger or turbo charger....


a Blow-Off Valve has an accual purpose, it doesn't just sound cool.

A BOV is just a big capacity valve that opens when there’s a strong manifold vacuum present. Well, that’s how all standard ones work, anyway. In fact, what the valve is designed to do is vent the pressure build-up that otherwise occurs between the closing throttle and the still-spinning turbo.

But if you want the valve to make lots of noise, install a whistle in its outlet. Seriously. It works...

http://us1.webpublications.com.au/static/images/articles/i21/2188_16lo.jpg
I hope that helps

Before you lecture make sure you know what you are talking about. First, that diagram IS WRONG. A Blow-Off valve has nothing to do with manifold or plenum pressure. It's main function is to prevent compressor surge. There is something called a "Throttle Body" which when opened, allows air to run through it and into the motor, causing combustion. On a turbo car you are forcing compressed air through this hole. So what happends when you let off of the gas and the compressed air hits a wall. It goes back out the way it came...through the compressor causing compressor surge. A Blow-Off valve has a flapper basically using spring pressure to hold it close. When the throttle body closes, the air is forced out the blow-off valve...which makes a noise. Most cars need the air to go back into the intake (the pipe that goes into the turbo) because cars with MAF sensors had X amount of air going into the motor...but the blow off valve let Y amount of air out...causing Z quantity going into the motor. Because there was supposed to be more air in the motor, the car adds more fuel, causing the car to run rich...which degrades performance.

...uh...yeah...a supercharger or turbo charger....


a Blow-Off Valve has an accual purpose, it doesn't just sound cool.

A BOV is just a big capacity valve that opens when there’s a strong manifold vacuum present. Well, that’s how all standard ones work, anyway. In fact, what the valve is designed to do is vent the pressure build-up that otherwise occurs between the closing throttle and the still-spinning turbo.

But if you want the valve to make lots of noise, install a whistle in its outlet. Seriously. It works...

http://us1.webpublications.com.au/static/images/articles/i21/2188_16lo.jpg
I hope that helps

Before you lecture make sure you know what you are talking about. First, that diagram IS WRONG. A Blow-Off valve has nothing to do with manifold or plenum pressure. It's main function is to prevent compressor surge.

Before YOU lecture anybody you should get your facts straight.

First off here's a picture of a BOV http://63.249.245.50/parts/GReddy/Blowoff/Blowoff_valve_TypeS_lrg.jpg

That top nipple goes to a vaccum source, typically AFTER the throttle body (also can be located in other areas i.e. fuel pressure riser ANYWHERE it can see vacuum or boost pressure). With out that vaccum line connected a BOV will NOT function, so it is a VERY important element of a BOV for it to work properly.

You are however correct on everything else.

I don't mean to come off like an ___ or anything its just you snapped at someone who gave out facts and you come off on him rather harsh.


-duey

dont hate......educate!





fockers!

^^^ Lol~ we learn something new each day :P

There are other options you can go if you want that BOV sound, HOWEVER they don't provide any actual function other than creating the whistle sound and make your car as ricey as a steam cooker :P

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1&item=7950762225&category=33633

...uh...yeah...a supercharger or turbo charger....


a Blow-Off Valve has an accual purpose, it doesn't just sound cool.

A BOV is just a big capacity valve that opens when there’s a strong manifold vacuum present. Well, that’s how all standard ones work, anyway. In fact, what the valve is designed to do is vent the pressure build-up that otherwise occurs between the closing throttle and the still-spinning turbo.

But if you want the valve to make lots of noise, install a whistle in its outlet. Seriously. It works...

http://us1.webpublications.com.au/static/images/articles/i21/2188_16lo.jpg
I hope that helps

Before you lecture make sure you know what you are talking about. First, that diagram IS WRONG. A Blow-Off valve has nothing to do with manifold or plenum pressure. It's main function is to prevent compressor surge. There is something called a "Throttle Body" which when opened, allows air to run through it and into the motor, causing combustion. On a turbo car you are forcing compressed air through this hole. So what happends when you let off of the gas and the compressed air hits a wall. It goes back out the way it came...through the compressor causing compressor surge. A Blow-Off valve has a flapper basically using spring pressure to hold it close. When the throttle body closes, the air is forced out the blow-off valve...which makes a noise. Most cars need the air to go back into the intake (the pipe that goes into the turbo) because cars with MAF sensors had X amount of air going into the motor...but the blow off valve let Y amount of air out...causing Z quantity going into the motor. Because there was supposed to be more air in the motor, the car adds more fuel, causing the car to run rich...which degrades performance.


I don't know everything about turbo/superchargers and I won't pretend I do, but this is how the new BOV's work. I didn't mean to offend you...or anyone. Sorry if I did.

Ya thanks for the answer I asked a mechnic and he said the same thing you need a turbocharger. But you said there are some ways to install a BOV so it doesnt do anything just sounds "cool" to be at least.

Ya thanks for the answer I asked a mechnic and he said the same thing you need a turbocharger. But you said there are some ways to install a BOV so it doesnt do anything just sounds "cool" to be at least.

you can weld it on the exhaust pipe so it'll sound louder than under the hood.

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1&item=7952565030&category=42610




WHY SPEND THE MONEY BUYING A BOV WHEN YOU GET THIS FOR MUCH MUCH LESS

HKS SSQV BOV is so nice, but the bov sound get annoying after awhile though so atmpsheric bov are just to make pretty noises. You need a turbo before you can get a bov and yes you can always grab those fake electrical bov.

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1&item=7952565030&category=42610

That is the sound of a turbo spool. Not a BOV.

haha i havent heard of the fake turbocharger sound maker thing yet, but ill check it out look cool, and i heard that the sound of the bov can get annyoing at times...

lol, hearing the same sound over and over again while you drive would get kinda annoying...but you gotta have love for the BOV.


I'd buy one, and everytime I heard that "Psssttt", I'd giggle like a lil school girl inside. :love:

Whatever you do... don't buy one of those fake turbo sounding thingies....

Please don't! You will be made fun of!

I do like the BOV sound though... my favorite is driving by people at full boost and letting off the gas! Hahaha... I made a kid jump the other day, looked like he was going to ____ his pants! I have the TurboXS RFL and it's one loud mofo...

I wouldn't turbo the Scion though, the rods look like toothpicks...

so why did you turbocharge yours?

The car I'm buying in a week has a Greddy Type S bov, sounds pretty nice...But the HKS SSQV is by far the best sounding bov.

The car I'm buying in a week has a Greddy Type S bov, sounds pretty nice...But the HKS SSQV is by far the best sounding bov.

what are you buying?

does anyone here even own a BOV?? i have a pic of the greddy type S, IHI turbo and saab intercooler i got to make for my other car, but since im selling it, that project was scrapped prematurley.

oh yeah as for the post, kinda noobish, but if he really wanted wasnt there those stupid electric things that was like a speaker in your engine bay, and when you changed gears it "simulated" the bov sound and sent out a whistle

Cough*rice*Cough

does anyone here even own a BOV??

i do, on my sr20 powered 240sx (greddy typeS)

Wow what an interesting thread...

I don't think I can say more then that without getting
flamed! LOL

we almost got into the argument about the function of a BOV again! wow!

I dont like the fake blow off valves. Its a rip-off the real ones, I would rather get a few extra parts to get my scion to look better then just make fake sounds.

The car I'm buying in a week has a Greddy Type S bov, sounds pretty nice...But the HKS SSQV is by far the best sounding bov.

what are you buying?

1990 Eclipse GSX 16G turbo.... :bow:

I had an 84 SVO Stang, turbo 4 banger. Pumped the boost to 10 psi, toasted 3 turbos in 3 months (2 in the same week) I had to send the turbo out to have mods done to it, what all was done I'm not sure but the thing ripped. The 'Wastegate valve' 'least thats what every AirReasearch manual I ever read, was to keep compressor surge down and keep from blowing the turbo off the intake. When i sent out the 3rd turbo I got it back with a totally different waste gate valve. Not sure what was done but it spooled quicker and sustained a boost longer than the others. I miss that car. Smoking 5.slows daily and ____ing them off with my 'mock GT'. I took all the GT parts off a 92 gt and swapped them with my 84. Pop the hood and watch guys laugh, for a minute, then realize they got lit up by a 4 banger. :rofl: I haven't spent time researching turbos again but I think in 84 a blow off valve wasn't heard of, maybe I'm just old and wanted to talk to myself.

well we get to this point dont get blow off valve if u dont have turbo .........btw wait for another 2-3 years to get your warrenty expired :)