Champ S14, Keioffice S15 BOV.. what is it!!!

[95zilvia]

What blow off valves are they using!
Both of them sound so much alike..
it's like, wzuuzuuuu.... i really want to know what blow off favles those are.
They sound super nice.
If I can't figure out what they are, then I might have to get the GReddy Type-s.
I want to say that those are sheep dogg blow off valves, but i dont know. please tell me
Tell me now! tell me!

[cooldill]

they dont use bovs, all wastegate. not recommended

[Vopt]

What do you mean by that? What's the diffrence between a wastegate and BOV?

[95zilvia]

Oooo, where can I learn more about using wastegate vs BOV.
Im pretty sure they use BOV, because it blows off even when you are not max boosted out.
And what kind of wastegates are those! External or internal?
I am hunger. W E H O N G R Y!

[Steeles]

its called compressor surge. you dont use a wastegate as a blowoff valve two totally differnt functions. no bov = suond of compresser surge. yes it sounds like a BOV but its not.

[95zilvia]

Uhm... are you sure, can someone verify this?

[Bliss]

Originally posted by 95zilvia
Uhm... are you sure, can someone verify this?

if you really want verification, go do the research. otherwise, dont ask for more answers when one has been provided...maybe you're looking for a bit more information on this?

[SleepySR]

The Team Orange drift team does the same. you just have to be ready to rebuild your turbo

[95zilvia]

The more Im researching, the more I hear that it is not a BOV sound.
I have gotten answers and most of them involve... no BOV

They say it's either an external wastegate, or it's the turbo spoolin down.

Whatever it is, they always say it's bad, but if it's so bad, then why do a lot of the big drift cars do it?

ie. Champ s14 and KeiOffice s15

And how bad is it?

[Steeles]

its bad because of compressor surge... all that charged air coming back and hitting the turbo whell blades. (this is why stock cars run by-pass or blow off valves) this is bad for the turbo and cancause broken compressor blades. then you have to rebuild it. race cars/company exhibition cars run them that way forbetter throttle response etc etc and they can afford to rebuild or replace the turbo whenever they feel like it. search for "compressor Surge" for more info on why all its bad. or just trust me when I say it's bad. like drugs. mmm kay?

[dsilcrazy]

:bs: I don't know where you guys are getting the idea that running without a bov is good for performance. I would like to see one tuner/exibition car that is not running a bov/compressor bypass valve. Having a bov takes care of two things it extends the life fo the turbo by releasing excess boost pressure to get rid of compressor surge. The other advantage is that the turbo does not slow down as much between shifts thus decreasing lag. If you guys are wondering why you cant see the bov's on the champ s14 and kei office S15 is because most good bov kits for the those cars put the bov in the same place as the stock one. which happens to be right underneath the fuse box in the engine bay.

[95zilvia]

Im not talkin about the performance
All i wanted to know is what kind of BOV or whatever makes the sound in the CHamp S14 and the KEIoffice S15
Or even the Amuse Supra!

[nismofeind]

I have read a few thinks about this. The compressor surge isn't that loud if there isn't a bov. Many of the drift cars use BOV's but they use either the greddy Type R heavy spring or the HKS racing spring (average boost is for these BOV's is about 2 bar). both are very very hard to open, SO they rarely open up enough to let all the air out. Thus compressor surge.

[dsilcrazy]

Since the kei office s15 is running a recirculated bov my guess would be either the greddy type S or the HKS SSQV. Although my oppinion would be the HKS just because when a car is built by a company they tend to stick with just a few specific brands. As for the champ s14 your guess is as good as mine, even though I still think it might be one of the two that I mentioned above.

[95zilvia]

I believe I will be getting the GReddy, type S..
I need to research more about this recirculating or whichever.
I still would like a DEFINATE answer to my question tho.
:bow: Thank you.

[Steeles]

Originally posted by dsilcrazy
:bs: I don't know where you guys are getting the idea that running without a bov is good for performance. I would like to see one tuner/exibition car that is not running a bov/compressor bypass valve. Having a bov takes care of two things it extends the life fo the turbo by releasing excess boost pressure to get rid of compressor surge. The other advantage is that the turbo does not slow down as much between shifts thus decreasing lag. If you guys are wondering why you cant see the bov's on the champ s14 and kei office S15 is because most good bov kits for the those cars put the bov in the same place as the stock one. which happens to be right underneath the fuse box in the engine bay.

BISH WE JUST NAMED LIKE 4. the driver of the black car at the NOPI drift exhibition is a friend of mine he ASKED the team orange drivers. they said NO BOV. dont talk out of your ass its not becoming

[HiPSI]

Originally posted by Steeles
BISH WE JUST NAMED LIKE 4. the driver of the black car at the NOPI drift exhibition is a friend of mine he ASKED the team orange drivers. they said NO BOV. dont talk out of your ass its not becoming


to add to this, they popped the hood on the car at nopi when they were done and low and behold, a blitz turbo and no BOV;)

[Steeles]

you can go and look at the signal twin car pics in Super Street and I'll kiss yo momma if you can point out a BOV on thier setup.. since the IC piping is all of like an inch long. topmounts dont leave much piping to mount one on.

[95zilvia]

Alright "BISHes" haha, thanks a lot for all the help.
Still, I would like to know how harmful it is to the turbo if I am running without a BOV, or is there some sort of alternative that the drifters use that I should look into?
I just want a BOV that flutters!
like...
vroooooom suu su suu

instead of a fat pshaaaa pshoooo or a pshwooooo!

[Steeles]

go back and reread my original post... the trick they use is THEY CAN EASILY AND AFFORD TO REBUILD THE TURBO OFTEN. as for how harmfull it is.. its hard to say.. modern turbo designs are stronger but it will wear the turbo down alot faster without one. for the chirp sound.. search FA there was a website with all kinds of different bov soundclips up. but I believe the older HKS ones sounded like that. not sure on the new ones though.

[dsilcrazy]

Just because you can't see it doesn't mean its not there. The bov could easily be mounted on the bottome of the intercooler. Why don't you go here http://www.signalauto.co.jp/4_5DRIFTSPEC.html and check out the actual specs, then you can see in plain japanese that they do use a bov. In case you can't read japanese, do what I do and go here to translate http://babelfish.altavista.com/babelfish/tr. As for the team orange drifters why don't you post up some decent pics or some actual specs on the car instead of saying "Yea I heard from my mothers, brothers, cousins, sister in laws father who happens to know the guy....

[Steeles]

how about you read HiPSI's post since he WAS THERE and can verify what I said?

[Dousan_PG]

i find this thread funny

ive seen them in person (all of those)...and i really dont are about the BOV business...but!

anyways..signal car (i see no BOV)


http://www.urbanracer.com/gallery/gallery/event_coverage/d1gp/d1gp_us_driver_search_6-15-03/0644.jpg
http://www.urbanracer.com/gallery/gallery/event_coverage/d1gp/d1gp_us_driver_search_6-15-03/0002.jpg
http://www.urbanracer.com/gallery/gallery/event_coverage/d1gp/d1gp_us_driver_search_6-15-03/0008.jpg

team orange cars:
http://www.urbanracer.com/gallery/gallery/event_coverage/d1gp/d1gp_us_driver_search_6-15-03/0020.jpg

[Steeles]

hehe thanks dousan I came back to work to go find those pics again... I have the signal ones on my HD here and knew the site. but had to go play hero. female + Dead Battery = me to the rescue.


although I REALLY wanted to kiss your mom :eek: :coolugh: :p

edit; now I remember why I dont use that signal engine pic as my wallpaper.. makes me want to take the engine aprt and powdercoat the valve cover and intake mani.... crap. now I gotta decide a color.....

[G_Fish240]

i heard the first generation of the hks ssq release the air like a shudder (sequntialy) im not sure about this though, anyone have a 1st gen hks ssq?

[95zilvia]

I think I may get a Greddy Type S because I lvoed the way it sounded on a Turbo LS Integra..

[Maeda]

I'm the compressor surge king around here and let me tell you its a bad ass sound... HOWEVER it also means the devastator isn't happy so just buy a BOV.

HKS SQVs explode if i'm not mistaken. Shell out for a SSQV and never look back.

[95zilvia]

I like the sound!

[HiPSI]

i don't mind a little compressor surge, but going on a mountain run and being on/off on/off the throttle ends up popping off my intercooler piping all the time, then the car dies, and no power brakes or power steering down the mountain:(

[LOwrestling2001]

guys, the champ s14 is on a stock t28, and the kei office s15 is on an hks gt2540...now for sure i know the S14 is using a STOCK s14 bypass valve, why? because my friends s14 motor has the stock and it sounds exactly the same, it is not compressor surge, that sound is slightly different. the s15 is more than likely using a stock bypass valve also. this brings me to the question, how much boost can the stock s14 and s15 bypass valves hold?

[Grandpa]

Just because you can't see it doesn't mean its not there. The bov could easily be mounted on the bottome of the intercooler. Why don't you go here http://www.signalauto.co.jp/4_5DRIFTSPEC.html and check out the actual specs, then you can see in plain japanese that they do use a bov. In case you can't read japanese, do what I do and go here to translate http://babelfish.altavista.com/babelfish/tr. As for the team orange drifters why don't you post up some decent pics or some actual specs on the car instead of saying "Yea I heard from my mothers, brothers, cousins, sister in laws father who happens to know the guy....

I've read before that ball-bearing turbos are not subject to the same strain as needle bearing turbos when subjected to compressor surge.

Turbonetic's site states this, and I included another link to a compressor housing/wheel that eliminates surge as well.

BB turbo with ported shroud compressor housing that elminates surge:
ats turbo (http://www.snowwest.ca/swpd/ford13.htm)

Turbonetic's site:
ball-bearing option description (http://64.225.76.178/main.htm)

So yeah, maybe they aren't running bov's because they can afford big-dick turbos that don't need them. Now that I'm done owning you, I can go back to watching Indiana Jones.

-john

[240eggsx]

compressor surge sound = sound of chipmunk/squirrel when you try to steal his nuts

[95zilvia]

Originally posted by 240eggsx
compressor surge sound = sound of chipmunk/squirrel when you try to steal his nuts

DEEEZ NUTZ?!?