How To Hear The Bov

[Kv!]

Hey guys

Sorry noob question.

How do I hear my standard bov (fg) without venting it or replacing the airbox ?

Cant do much to it all, as I get the car through work, meaning I will have to revert everything back to standard every time I need a service lol

Cheers guys

[Gloo]

You cant, technicly the bov stil makes noise but scince it vents back into the intake you can not hear it. So you have to vent it to hear the noise. Now about the air box, changing it will only change your induction noise, the sucking sound you "cant" hear at the moment if it stock. So dont worry about that.

To get the fluttering noice, cut your vacuume line in half, that is the 4m odd diameter line connected to the top of your bov, and run downs near the fire wall to a t pice. Add bolts to eaither side of the cuts. Your bov requires vacuume to open and vent, you have now blocked that line off. So, if it cant open and vent the air, it has to pass back though your turbo and out your stock air box, giving you a fluttering noise, Changing the air box will change the noise. But this is how to get it fluttering.

I think this is the easyest way to get some noise. And all you will need to do is replace the cut vac line for ya services, a few bucks will cover that. Hope this helps.

[matsfgxr6turbo]

why the f___k would anyone risk stuffing their turbo by stopping the bov venting just to get some gay fluttering just go and buy a vl turbo if that's what you want

[ravenhard]

I notice more induction noise and then more flutter on lift off the throttle just by installing a KN panel filter. Would take about 2 secs to put on and off.

[PHANTMXR6]

why the f___k would anyone risk stuffing their turbo by stopping the bov venting

You sure about that mate?

You must be well misinformed.

[matsfgxr6turbo]

then why does every manufacturer put a bov on turbo engines then genius to protect the commpressor wheel from back pressure when the throttle is shut and to improve the turbo spool time between gears its not jut there to make a ricer sound for losers.

[FOONIN]

that's what I think too, stuff doing anything that has a chance screwing your turbo over. Just buy a stealth FX an f'in awesome BOV which a blind armless monkey could install, best BOV for an xr6t my opinion

[FOONIN]

Cant do much to it all, as I get the car through work, meaning I will have to revert everything back to standard every time I need a service lol

Cheers guys

Depending on if your car has a mechanical warrantly or a factory warrantly. If its just a mechanical warrantly you can change parts however If a problem is caused by the replaced part or has caused another part to fault then they dont cover it. that's what I got. If you got factory warrantly I am assuming your car is getting a service every year or more. In that case I would just switch the stealth FX and stock for the service. Its so easy to switch them. You got a manual or auto???

Edited 16/02/10 09:40 PM by osonvs

[mattyb]

then why does every manufacturer put a bov on turbo engines then genius to protect the commpressor wheel from back pressure when the throttle is shut and to improve the turbo spool time between gears its not jut there to make a ricer sound for losers.

I'm assmuing by the fact you only have been on the forum for a little over a week, that you haven't read too much into 'compressor surge'. Do a search for it in here and I'm sure you'll be surprised. There are some VERY well informed write-ups explaining the use and benefits for having/not havin BOV's. Each to their own, I run the standard one cos I like having a plumb back BOV that SCREAMS! Also the fact that by moderating how I use the throttle changes the noise I produce.

Edited 16/02/10 09:48 PM by mattyb

[f-wolf]

The BOV is there for a reason !!

" Compressor blowoff and bypass valves play a vital role in any turbo system because they not only improve the performance of your vehicle but they also increase the longevity of the turbocharger as well. The primary function of any blow-off or by-pass valve is to prevent compressor surge by relieving the compressed airflow that reverses direction as the throttle is closed. Blowoff and bypass valves reroute the pressurized air, that is normally forced backwards into the turbo compressor, into the intake stream or by venting it to the atmosphere. Subsequently, engine performance is then increased from quicker turbo spool up, as the compressor speed is not reduced by the backward airflow. The longevity of the turbo is also increased, as its bearings will not suffer from the impact that is also produced by compressor surge. "

And

" Basic tech behind a Blow-off Valve (BOV).

Blow-off Valves can play a vital role in any successful Turbo System. They not only improve the performance of your vehicle but they increase the longevity of the turbocharger as well. Their main function is to relieve compressor surge (pressurised air normally forced backwards to the compressor causing the compressor to slow down) when changing gears / backing off the throttle. A good BOV can achieve this function without slowing down the compressor speed, as maintaining compressor speed helps to minimise Turbo Lag.

Just imagine your turbocharger spinning at close to 100,000 + rpm pumping a massive amount of charging air towards the throttle body with speed close to 100 meters per second … then you suddenly let go the accelerator. The "reversed" pressure forces produced are so huge that at worst you will blow your turbo instantly! Repeated stress from compressor surge can damage the turbocharger and cause turbo failure. This is a “NO NO” to the life of your turbocharger; however fitting a BOV will dramatically improve this problem. By installing a BOV you will significantly reduce turbo spool up time. You will notice boost will come on earlier with much less Turbo Lag between gearshifts, giving you a big improvement in throttle responsiveness and drivability with more useful low-end torque."

I hope this will help you.