Thread: BOV noise? real rwhp or just gimmick?

theres benefit...but only if you have real work done to the car...if you have a stock turbo it is just one sexy sound lol

Originally Posted by bmahon26

theres benefit...but only if you have real work done to the car...if you have a stock turbo it is just one sexy sound lol

X2. It works fine at stock or near stock levels, anything more and it should be beneficial in extending the life of your turbo and holding bit more boost.

basically only need one to hold in more power once you start modifying

The purpose of venting the air serves an actual functional purpose.

When you lift off the throttle, and the throttle plate closes, the turbocharger is still spinning and generating boost pressure. If that pressure were to stay in the charge piping, it will back up into the compressor wheel on the turbocharger causing damage to it. The bypass/blow-off valve exists as a failsafe device to vent that residual amount of pressure at throttle lift.

Functionally, it does not matter if that air is discharged back into the intake side of the system as a recirculating valve does, or if it's vented out of the system like an atmospheric blow-off valve. The pressure just needs to be vented.

In most OEM turbocharged applications, the air is recirculated to keep the engine quiet, and in some cases because certain engine management systems require that the air be recirculated so as not to cause a rich fuel condition by venting metered air. This will typically occur on some mass air-flow sensor (MAF) based engine management systems.

Because the Genesis coupe uses a MAP sensor based system, it does not matter what type of valve is used, so long as the pressure is vented in some for or another. It will be entirely user preference.

There is no horsepower gain regardless of the type of valve unless it is replacing a valve that is leaking due to a failure of some sort (torn diaphragm) or a valve that uses a spring that is too soft for the boost pressure that the application is making, in which case an adjustable aftermarket replacement will allow you to regain any lost pressure and power.

correct...what he said.

What are the different spring pressures that come with the Forge BOV?

Green 5-15 PSI
Yellow 15-23 PSI
Blue 23-30 PSI

We also have a Black spring rated at 3-9 PSI and a Red spring rated to 30+ PSI, but I haven't been including them because they will undoubtedly never be used in a stock turbo application.

The little shims/washers are there to adjust between two spring tensions if an intermediate setting needs to be achieved.

Hmm I saw the blue spring but no others...I know one came in it I'm assuming its green?

what spring should be used with a non-tuned, practically OEM setup? I really like the BOV but I'm not planning on changing my ECU settings, just intake and exhaust. Any chance of getting one from you guys powdercoated?