lol that sounds like my friends old turbosmart bov. It was the most annoying thing ever, at one point i refused to ride in it unless he didnt hit boost.

 

Hardly debateable. VW and Volvo's? From the 70's maybe. They all have them now.

Xspeed website:

Compressor blow-off and by-pass 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. Blow-off and by-pass 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.

Carblog website:

On a turbocharged engine, when the turbo spools up it pressurises the intake system - from the compressor, past the throttle body and through the inlet manifold, forcing more air into the combustion chambers. This is how a turbo produces more power, but I’ll go into the specifics in a later article.

When you take your foot off the accelerator pedal, the throttle body closes - the stream of pressurised air created by the turbocharger is now cut off from the inlet manifold. The only way it can escape is back up the intake stream, surging into the turbo compressor. This reversal of intake charge pulse can put additional strain on the turbo components, as well as reducing the compressor wheel’s rotational velocity. This means that the turbo will take longer to spool up when the throttle is opened again.

A valve placed before the throttle body cures this problem by allowing the pressurised charge to escape the intake system, keeping the compressor spinning and reducing turbo lag. I won’t go into the specific details of how the valve opens when needed, but if you want to know more then email me. Many turbocharged cars come with such a valve from the factory, but they are recirculator valves rather than BOVs - the compressed air that escapes is plumbed back into the intake before the turbo. BOVs vent this air to the atmosphere instead.

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. Though many vehicles incorporate factory by-pass valves, they are often undersized and quickly are beyond their capable operating range as airflow levels are increased.


http://www.newton.dep.anl.gov/askasc...9/eng99202.htm

The blow-off valve should not be confused with a waste-gate. The waste-gate is a
device that by-passes the turbine wheel of the turbocharger, limiting the
shaft-speed of the turbocharger. Therefore, limiting the boost
(pressure) that the compressor generates and keeping the turbocharger
from over-speeding.

A blow-off valve is mounted in the intake plumbing between the
turbocharger compressor and the throttle plate. The blow-off valve is a
second safety measure against the turbocharger over-boosting and damaging
the engine.

The blow-off valve is more commonly used to keep the turbocharger spinning
when the throttle plate is suddenly closed. When the turbocharger is
generating maximum boost pressure at full throttle and then the throttle
is suddenly closed, compressed air coming from the compressor slams
against the throttle, generating extremely high pressures that travel
backwards to the compressor stopping the compressor from spinning. When
the throttle plate is again opened, the engine must spool the turbocharger
shaft again. The effects of this high pressure can also be very damaging
to the turbocharger.

Brian Wright
Washington University in St. Louis Formula SAE Racing

I don't care what you do with your turbo or car. just disconnect your bov/bypass valve and let her rip! Gobble Gobble....

 

Ok, I thought of an easier way to achieve the same result. Acquire a large supply of turkeys. Carry them around in a large bag, and every time you shift, drop 1 or 2 of them out of the window so they roll under the car. Post vids.

 

step 6, got to jail.

step 7, peta sends nudes

profit.

 

sssssshhhhhhh......

 

You can totally throw turkeys under your car as long as you plan on eating them later.

Maybe not as good as a shotgun but the meat gets nice and tender, especially if they flop around in your wheel wells a few times before getting tossed onto the road. If you're lucky, feather plucking is down to a minimum.