just installed bosch110 and have ?

[americanjebus]

well i got a certain something in the mail today and right after school i went to work putting it into the car, when i pulled my stocker i blew through one end and air just flowed out of the other.

now i put the thing in and coaxing some of the hoses to fit was a trial in itself but i got it all in nice and snug but im still left with some questions.
after putting it all in and driving it arround im wondering if the damn thing is releasing pressure.

i took it up the hills arruond my house spooled up just fine and dandy but when i let off of the gas spooling just stopped, not even a little pssss or sound of air being releived. car drove just fine. no issues, but i know everyone with it talks about some "wooooot" sound that comes from the valve during normal driving. i got no such sound, infact i get no sound. just spool, then it just stops. i got the k&N and 3''dp so i know i should atelast hear some pressure being releived. i hooked up the vacuum lines ok.
any input or should i just stop being anal about this and accept the fact the bosch 110 doesnt make noise.

 

[albertmdh]

my stock one cant be blown through but doesnt make noise either, even vented to atmosphere, try disconnecting the intake side and shoving a cork or something in the hole in the intake hose, not the bov, and drive around like that, see if you get noise.

 

[cwapface]

Do you have the stock air box? I put my 100 on with everything stock and I could *barely* hear it blow off, it was a tiny little psssh sound. Now with the k&n setup I can hear it very well, but as long as you are holding boost and not hearing a flutter it should be ok....right?

 

[Jetfixr757]

What you will get is at about 0 psi when you are driving you will or might get a hoot, mine does it and it doesn't bother me some people it really gets on thier nerves, it only does is at 0 between negative and positive pressure in the manifold, and if you play with the gas pedal you can get it to do it when you are at 0 on the boost gage. You will not here a release of air like a vented blow off valve, remember this is a bypass valve and it goes back to the intake, what you will here is the intake air going into your engine you can here the difference when you let off the gas.
William 89T

 

[Bishop92t]

What boost level are you running?

Unless your exhaust is really loud you should at least hear a small whoosh when you shift or let off the gas.

 

[Kroze]

you can hear my spec 110 a mile away. it's freaking loud and mean.

When i go WOT and then release the gas pedal, all you can hear is the turbo spooling up (high pitch cream in your pants style) and when i let go of the gas (deep PSSSSH that is so freaking loud)

those 2 sounds alone is louder than my exhaust (3" all the way with megan GT muffler/no silencer)

of course you do know that you have to be in gear and driving right?

it also help if you boost more than 15psi. It won't do shit for you if you're running 7-12 psi.

 

[supra90mkiii]

you can hear my spec 110 a mile away. it's freaking loud and mean.

When i go WOT and then release the gas pedal, all you can hear is the turbo spooling up (high pitch cream in your pants style) and when i let go of the gas (deep PSSSSH that is so freaking loud)

those 2 sounds alone is louder than my exhaust (3" all the way with megan GT muffler/no silencer)

yea, that's what mine does too, very nice sound... but mine does not make the humming noise.

 

[Kroze]

yea, that's what mine does too, very nice sound... but mine does not make the humming noise.

that's odd. Once my turbo begin to spool, you can hear it spooling up, it gets louder and louder as it build more boost. It sounded menacing. High pitch like i have a supercharger.


I mean, I didn't think the 93 RX-7 TT even want to give me a chance to race him until he drive along side of me and hear my turbo spooling up. at the stop light, he's like, what you got done to it, i hear that thing spool. Sounds nice :icon_bigg

 

[americanjebus]

i got k&n cold air and stock exhaust exept for cooleeze.
im running stock 6.8psi (auto tranny)
i know im not gonna get the ssqv type sound, on the stock bpv i got a pfffpffpfff when i let off of the gas. now i will give it gas and i can hear spoool then when i let off it just abbruptly stops. i drove arround the block with no sounds exept for car and windows down and couldnt hear anything. am i not running enough boost to open the valve???

if i floor it say going uphill or on flat road i will reach my peak boost of like 6psi but i dont get that even slight hint of air being released like i used to get on the stock unit.

 

[Kroze]

omg that's why you can't hear shit. the damn spec 110 is good to around 25psi. You're not building anywhere near the boost level to release it.


turn it to somewhere around 15 or more.

 

[americanjebus]

yea i cant exactly turn my boost up to 15psi right off of the bat.
a few things come to mind
the oem hg
fuel cut
injectors
afm
tranny.<-kind of tops out arround 280hp before it breaks.

would keeping this setup be bad, im geussing it would be because the pressure isnt being released.

 

[cwapface]

it might be good to 25psi but that doesn't mean you have to hit that high before it releases. I'm on stock boost with a 5 speed and it releases when i let off the throttle fine

 

[Kroze]

it might be good to 25psi but that doesn't mean you have to hit that high before it releases. I'm on stock boost with a 5 speed and it releases when i let off the throttle fine

I when i ran the car @ stock boost with the Bosch, i could hardly hear it. And i have a 5speed. He have an auto, that doesn't help either.

 

[Kroze]

yea i cant exactly turn my boost up to 15psi right off of the bat.
a few things come to mind
the oem hg
fuel cut
injectors
afm
tranny.<-kind of tops out arround 280hp before it breaks.

would keeping this setup be bad, im geussing it would be because the pressure isnt being released.

I'm on OEM Head gasket, Stock Fuel Injectors,


Just get a Lex AFM, MBC, and AFPR, you'll be good.

 

[Bishop92t]

6.8psi isn't really much boost at all. I never heard my stock bypass valve until I turned up the boost. Too many other noises drowned out the pathetic woosh.

 

[mkIIIman089]

Wait... the Bosch BPV shouldn't need anything more then a tiny bit of posotive pressure to go off. As the way it works, its open all the time, until it hits posotive pressure; then it snaps shut until you let off and it opens up again. So if you can make boost w/o any symptoms of leaks it would indicate to me that the BPV is working fine.

 

[americanjebus]

ok i geuss i will accept the fact my bov doesnt make noise. im cool w/ that as long as it works right?

anyhoo, while at work today the only thing i could think of was what could i damage on 6.8psi if the bpv didnt release. would i slowly kill my turbo or would i just start blowing hoses and couplings?
what symptoms would i look for if it "isnt" working,

another part i didnt focus on as much was vaccuum, how does this valve react when i have bad vacuum pressure. would a vacuum leak cause it to not open, i still dont get how the vacuum pressure helps it work. does it keep it shut when there is not boost pressure?


sorry i sound like im a fukin tard but i like to research my doubts to make sure i dont fuck something up no matter how small.

 

[Bishop92t]

It might harm the turbo if you ran ~7psi for a while, short term use wouldn't hurt it. You wouldn't blow hoses any more or less then if the BPV was/wasn't functioning.

Vacuum pressure basically tells the BPV to open the connection between the two large hoses, thus venting excess pressure. Also, a BPV differs from a BOV in that under vacuum it's always open between vent and feed hoses, that's why you can't vent a BPV to atmosphere. Low vacuum should still blow off the valve.

 

[IHI-RHC7]

if you really want to know, get some long vac lines and run a line from the front of your turbo to your turbo pressure sensor, then run the line that originally goes to the turbo pressure sensor to your waste gate actuator.
This will do two things.
First, it will raise your boost by the amount that your IC robs from you, as the wastegate is referencing manifold pressure, instead of turbo pressure.
Second, Your boost guage will show you how much boost your turbo is making before the ic.
With this setup, an aftermarket boost gauge reading manifold pressure should show 7-8 psi. The stock gauge, now reading pressure straight from the turbo, should also read 7.5-pegged.
With your lines ran like this, you should be able to monitor compressor surge. Boost up to 6 psi or so and let off, if the factory gauge falls without a spike then the BOV is working correctly, albeit silently. If the stock guage spikes over 6 when you let off, something is wrong. I'd verify that you have vaccum at an idle to the bov.
Hope this helps.

 

[Jeff Lange]

6.8psi isn't really much boost at all. I never heard my stock bypass valve until I turned up the boost. Too many other noises drowned out the pathetic woosh.

I'm only at 8psi, but even if I'm not at full boost, I can still hear the stock BPV pretty well when I shift. Not stock intake or exhaust though.

There are cars that run 7psi stock with no BPV of any kind, no intercooler either, just straight from the Turbo to the TB, nothing else. (Z31 300ZX). Their turbos last a LONG time without issue. 7psi ain't much.