Looking into a BOV

[S14Life]

Is there a reason I see so many turbo'd cars with GReddy Type S blow off valves? Is it just a cheap BOV or is it a really good one? I have been looking at the HKS SSQV for a while because I like the look. But I'd take performance over looks any day.

[Fish240]

bov arent about perfomance, people just prefer the sound of the greddy type S i guess. Around here, everyone and i mean EVERYONE has an hks ssqv

[nissanrcer240]

bov arent about perfomance, people just prefer the sound of the greddy type S i guess. Around here, everyone and i mean EVERYONE has an hks ssqv

Well, not EVERYONE;)......I have a Type S b/c I got it for $50 from a friend, Im waiting to get the fmic before I put it on, hopefully it sounds good

[Morph]

I haven't herd any bad things about a Hks or Greddy's BOV's. But i wouldnt touch Blitz.

[nnkfws333]

I chose this route because I got the hotpipe and greddy type s for $150 so it was mainly for the price. It just sounds like a bird chirp

[180fan]

Buddy's got a Blitz, I think those got a bad rap. HKS are fine and so are the Greddys. Personally I've got a Sard. Just a bit harder to find out here than the other brands.

[S14Life]

mmm, I'm going to try and find some sound clips of them. I don't want it to sound like a bird chirp but rather a deeper and longer sound.

[GTS4-R]

i have the HKS SSQV and its by far the best IMO.....it can handle extremely high boost levels....pull irs a pull design so it cant leak out boost.....

As for blitz I'd take an oldskool Super Sound but other than that id be all set

If u wanna go ALL OUT.....get a Tial 50MM BOV.....best on the market....not for the meek

[Fish240]

or the HKS racing bov, holds 40 psi

[SoCalS14]

Does it matter whether its on the cold or hot pipe?

[Nathan]

I prefer cold pipe, but its not a really big deal either way. I'm really happy with my turboxs type 34, recirc'd. It works fantastic, I think I have two washers in it and it will open any and every time I close the throttle, whether I'm well into boost or not. It's pretty loud though, even recirc'd. Just makes a nice wooshing sound

[SpeedFreak]

I am running the Apexi twin chamber bov, seems to work well and holds up to the 22 lbs of boost I am running. Whhoooshh. I have been thinking of going with the type s for the sound quailitys of it but why mess with a good thing. Hell, I know how to whistle.

[GTS4-R]

actually the closer to the TB the better....itll respond faster (slightly) i wanted mine on the cold pipe just by the TB but there was a flange on my FMIC kit (for a greddy bov) on the hot side elbow extension to the hot pipe....so we cut it off and welded on the HKS flange....the hks is bomb but has that bird chirp/whistle kinda sound.....the Turbo XS RFL is a loud whoosh but Im not too familiar with how much boost they hold and how long they hold up....they seem to me to be cheap.....

The Tial 50MM BOV sounds like what u want....they are off the hook no doubt the best on the market....

[LSB_11]

i do beleive it is best to put the bov on the "hotpipe" closer to the turbo, for relief of pressure off the compressor wheel. this is to save the turbo, even though it does sound bada$$. i have had a type-s on my tsi with 17 psi, it was alittle shady, didnt have a steady blow off. no matter how much i messed with the little screw on top. now im running hks, most all my freinds run it on different apps. it seems to hold the best and have a crisp blow off, not sounding like it is blowing off two or three times some times.

[tErbo b00st]

This is the first thread I have seen w/ people saying the greddy type-s is a good BOV. IT SUCKS! I have 3 friends that are using or have used it and they all leak. The supra guys call it the greddy type-****. I originally wanted it for the sound, but the guys at touge factory said whatever i do dont get the greddy.

In order of what performs best (name brands)1) Tial (higher pitched woosh)2) HKS (bird whissle/chirp)3) Blitz (quieter deeper woosh)

Worst1) Apexi (no experience)2) Greddy (two tone woosh)

I have the blitz because I dont like the HKS sound and the tial u cant recirculate and it does not work so good at under 15psi. And these are more facts that my opinion, but take it as you may. The greddy does sound the best in my opinion though.

Here are some sound clips http://www.935motorsports.com/bovmedia.htm

[Phax]

If u wanna go ALL OUT.....get a Tial 50MM BOV.....best on the market....not for the meek

:Werd

The turbo system on the Diablo uses a Tial BOV. Those things sound like shotgun blasts between shifts.

[compression]

Quote »i do beleive it is best to put the bov on the "hotpipe" closer to the turbo, for relief of pressure off the compressor wheel[/quote]

Thats a little bit off. You want to put the valve as close to the throttle body as possible. This is where the high pressure wave starts when the throttle plate slams shut, and you trying to eliminate the wave getting to the compressor.But it really doesnt matter that much, just put it where it is most convenient. Hell, weld the flange on the side of your FMIC and have the BOV stickin out through the front grille. In fact, a BOV is not a complete necessity, I know plenty of people not running them (450Hp civic, Turbo Acura NSX, etc...) so dont sweat it too much. Its really not subject worth in-depth analysis.

I am running a GReddy type R, it doesnt leak and works perfectly, I am VERY happy with it. The most boost I plan to run is up around 17-18psi.

[GTS4-R]

Thats a little bit off. You want to put the valve as close to the throttle body as possible. This is where the high pressure wave starts when the throttle plate slams shut, and you trying to eliminate the wave getting to the compressor.

Yea thats what i tried sayin in the 1st place and he was tryin to tell me i was wrong....heh........

[S14Life]

Thanks for that link, tErbo b00st. I really like the HKS SSQV sound so I guess I'm going to stay with that.

[vboyq]

i was at the dirft showoff in miami and i was talking to one of the mechanics working on the red falken hatch and they use blitz turbo kits, i believe with the KKK turbo, and he said with alot of the new stuff like that turbo u don't need a BOV at all, they don't run one on any of their cars and they seem to be doing fine.

[S14Life]

I know that you don't HAVE to run one, but why not? I think they sound awsome and when they sound off people automatically are like "that ****'s turbo'd". Hehe

[wangless]

Quote »when they sound off people automatically are like "that ****'s turbo'd". [/quote]

also a sign to the cops in cali, "theres something illegal in there"

or a sign on my street, "lets jack that car"

[compression]

The reason some people dont use them is because they do not want to loose the pressure in their system between shifts. They want to keep it in there so that when they open the throttle for the next pull, the system is already pressurized and they dont have to wait for the turbo to "fill" the system back up.But, the down side is that the high pressure wave will travel back from the throttle body to the turbo compressor and cause some compressor surge and may slow the turbo down too much. But if you shift quick enough, it may not be a problem.I do recommend one for a street car, they do sound cool...he heh.

[vboyq]

oh well of course they sound cool and they are used for compressor surge on most turbos... but i was saying the mechanic said on the newer turbos, i guess his KKK turbo was an example, they don't have to worry about the surge.

but of course, get the BOV if you got the money, you work hard on your car so you do what pleases you!

[Luke]

I like the sound of my Greddy Type S. Sorry if anyone said this, but the type s can be recirculated right out of the box(important for our stock mafs system). The hks, you need to buy an adapter, and the other ones aren't ez.

[emperor_lunchbox]

i had twin HKS SSQV's on my 300 before i sold it, those are the best in my opinion. and they sound better than any other, all tho the type s is similar in sound, i dont think it has the same quality as the HKS.

P.S. does any one know where i can get a video/audio clip of the tial BOV?

[theburg240SX]

.....the Turbo XS RFL is a loud whoosh but Im not too familiar with how much boost they hold and how long they hold up....they seem to me to be cheap.....

the Turbo XS RFL can only hold up to 25psi.