hey, may be i'm blind, but i haven't seen any thread about blow off valve yet.
can anybody please show me how to install the blow off valve and show me where can i get it?
thank you in advance.

 

Forge makes one. Took me about 45 min to install. Was VERY easy. Was about 80 shipped.

 

http://www.forgemotorsport.com/conte...roduct=FMDVMCS link

 

mine sounds beast... my first reaction was =O!!

 

ALTA makes one as well. Clients on this board already have it, but we haven't shown it on our website. I will get that resolved ASAP. Thank you!

 

how does it sound like? is it a fluttering sound for it's a straight PSSSTT......

 

kool..let me know asap

 

CLICK HERE. TEXT COMING SOON!

 

psst if you dont let boost build, sound like a fluttering Supra of you let boost build fully.

 

that's probably the coolest bov i've ever seen

 

Hey THANKS!

 

What is a BOV? How does it make life better?

 

Good question! The cliff notes version is that it removes the excess pressure built up behind the turbo and the throttle plate during a shift. The larger ALTA version allows MORE pressure to be released. If excess pressure is allowed to be there and not relieved then over time damage can occur to the turbo. From a performance stand point relieving the pressure allows for faster re-spool time during gear changes.

Thanks for asking!

 

Any way the stock BOV can be vented to atmosphere? Sounds like a easy way to get some noise.

 

Thats what the Forge BOV does...

 

vrooom pshhhh! =]

 

why does the forge motorsport BOV look so much more different than the Alta BOv?

 

The Forge one looks different because its a spacer that goes before the stock diverter valve. I believe the Alta peice replaces the diverter valve

 

Can anyone use RealOEM to show me where this diverter valve is?

http://www.realoem.com/bmw/partgrp.d...31&hg=11&fg=05

 

Heck I threw an alta cold air on my R55 and you can now hear the stock BOV venting back into the track. Its not SUUUUUPER loud but its enough for me!

 

BOV vent to the atmosphere, waste gates vent to the exhaust. They are completely different things. BOV are designed to reduce boost pressure without slowing down the turbo. Waste gates are designed to bypass the turbine section of the turbo and reduce pressure and speed by venting exhaust gas around the turbine and into the exhaust pipe.

The Forge unit allows the mini computer to do it thing and works very nice, had one since day one. The ALTA unit according to the docs go onto the noise maker tube and required tapping into the intake manifold. I would change the docs and use the ALTA vac/boost adapter spacer and tap the vac/boost pressure that way and DO NOT drill anything (great for warranty issues).

Between the two above units, the Forge installs real quick, done one in less than 30 minutes and meets the goal of reducing pressure. The ALTA unit is nice and adjustable (if you know what you are doing), but does take longer and requires more things to be taken apart to get it in. Each has their benefits depending on your technical expertise

So far, my dealer has had nothing to say about the Forge unit (since it is invisible when installed) and the shop folks love the sound and increased response

Cheers.

 

Look here:

http://www.realoem.com/bmw/showparts...44&hg=11&fg=50

It is item #2, The dirverter unit is computer controlled.

 

Thanks, that helps.

 

but all together the best sounding blow off valve EVER

http://www.youtube.com/watch?v=VbNxugO-uf0

Just kidding
http://www.youtube.com/watch?v=M2--IIMSa9A

I am really digging the anti Poooshhhh

http://www.youtube.com/watch?v=J9CKLSjBzL8

 

Duck-call is cool. I may have to do that some day.