WS6ICK2k

First off this is not my car just was seeing which blow off valve this is and do they make any louder?, car says its running 10-13 psi I just love that sound and def want it on my build. Here is the video. What is the loudest you can buy?

http://www.youtube.com/user/FahadZO6#p/u/6/D8rq7QglIc0

http://www.youtube.com/user/FahadZO6#p/u/7/muEfMN5DQ90

WS6ICK2k

Also in the second video he revs it up at 2 minutes if you don't want to watch entire video.

NEED MO POWA!

iTrader: (2)

Procharger big red race valve vented to atmosphere, about as loud as it gets. I love mine

WS6ICK2k

Thanks man you should post a video, what psi are you running.

NEED MO POWA!

iTrader: (2)

here's a quick vid my friend shot this with his phone lol. I'm running 17 psi.
http://www.youtube.com/watch?v=a_IZw5Ur-zM

GarrettM

iTrader: (6)

The big red race valve sounds awesome, just keep in mind a major factor will be the amount of boost you are running. Im sure you know that though.

WS6ICK2k

Wow your car sounds like a freaking jet.

Didn't hear much cam lope are you running stock internals?, I highly doubt with that much boost could be the video quality.

allout06

iTrader: (11)

Not true. Im running 5.5psi and I have the open Big red, and it runs fine. Works exactly how its supposed to.

67RSCamaroVette

iTrader: (63)

He means the boost determines how loud it is... my race parts 50mm BOV sounds like a gunshot when it releases at 15psi.

allout06

iTrader: (11)

o ok got ya. i thought he meant you have to make a certain amount of boost to run the Big Red. Ive heard people say youll lose power with that bypass valve if you dont make x amount of boost.... But yes, the more PSI you run the louder the bov is. smaller the pulley you run on the car, the louder the blower will be.

04BlackGmc

iTrader: (19)

I love my red valve.
http://www.youtube.com/watch?v=2vACDl_SQQ0

http://www.youtube.com/watch?v=lFjqrg_1-tM

vmapper

iTrader: (8)

Just a pet-peeve of mine. These are not blow off valves. This term is highly mis-used in the appropriate application.
Blow off valves are for Turbos Only. - end of story. If someone is using a blow off valve on a belt driven FI car, they dont understand how they work, and are hindering optimum performance, fuel economy and longevity.

Bypass valves or Surge valves are used with Belt driven blowers, such as a centrifugal like Procharger.

They work differently and have their own applications.


Centrifugal type blowers - Even with relatively little increase in engine load at low throttle positions, air is still being pumped by the compressor on a belt driven system, unlike turbo, where boost is non-existent.

With a Belt driven system, this pumping volume is still greater than the engines airflow requirements at idle and low loads, so pressure builds between the throttle blade and the compressor. The added pressure on the compressor blades creates drag on the accessory drive that can make idle control difficult amongst blade stresses, more hp to continue the turn, and lower fuel economy.



A BOV at idle or high vacuum in the manifold will NOT let this pressurized air out where as a surge valve or bypass valve is open during vacuum and part throttle. Even with modification of the spring action of a turbo BOV which is set for a certain pressure level to allow air to escape, you will not get a proper response throughout all engine loads vs RPM. You may make it work for idle, (ex. 35Kpa Vac) but it will not work at 3000rpm with 22% TPS (throttle), real world talk



Leave the two alone and only use the appropriate device for your application.

5w20

iTrader: (21)

My buddy with a D1SC and the red race valve.




http://www.youtube.com/watch?v=zjnJqtkd8wM

BlkHwk

iTrader: (8)

A BOV will work on a centrifigal, and work well @ that. You just need to know what to do to make it work, and its a very simple change.