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Old 05-01-2008, 12:07 PM   #1
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Default My Experience with Bypass Valves

Last night I changed out my Forge Motorsport 007P for a Perrin Signature Series Blow Off Valve both are recirculating valves. The Forge valve made a the stupidest sound i've ever heard. It's sounds like a hammer hitting an anvil. It drove me nuts it seemed to work just as it should but I couldn't stand the noise it made. I was fortunate enough to findan old Perrin BOV forsale on a local board. Man!! this thing sounds way better just a slight woooosh noise. I just wanted to give a brief review of these.. The Forge valve works well but sounds like ***.. Perrin works well and sounds like sex with Alison Armitage.
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Old 05-01-2008, 12:10 PM   #2
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I'd hit it
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Old 05-01-2008, 12:12 PM   #3
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i'm a sucker for a red head..
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Old 05-01-2008, 12:19 PM   #4
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Why not just get a bosch valve if your recirculating? I hear those are pretty reliable and cheap to boot.
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Old 05-01-2008, 12:22 PM   #5
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videos of both now please; I don't read books, I listen to the CD.
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Old 05-01-2008, 12:33 PM   #6
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Why not just get a bosch valve if your recirculating? I hear those are pretty reliable and cheap to boot.
because the Perrin was deliverd to my door for just slightly more than the Bosch and I got it the same day.
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Old 05-01-2008, 12:35 PM   #7
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videos of both now please; I don't read books, I listen to the CD.
The Forge is never going back on my car.. If it wasn't so expensive Iíd hurl it in to the Ohio River..
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Old 05-01-2008, 01:24 PM   #8
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Install the valve the other way around and it won't make that sound.
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Old 05-01-2008, 01:28 PM   #9
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Install the valve the other way around and it won't make that sound.
too late.. it was installed per the "destructions" and it failed..
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Old 05-01-2008, 01:29 PM   #10
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Install the valve the other way around and it won't make that sound.
....so your saying he installed the valve backwards?
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Old 05-01-2008, 01:37 PM   #11
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....so your saying he installed the valve backwards?
No, he is saying you need to install it backwards to get rid of the shitty Ping sound.
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Old 05-01-2008, 04:51 PM   #12
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Originally Posted by Saml01 View Post
Why not just get a bosch valve if your recirculating? I hear those are pretty reliable and cheap to boot.
+1 I find the Bosch valve sound great...plus getting a hookup from a tech @ Audi even sweetened the deal...OP do you have any sound clips?
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Old 05-01-2008, 04:53 PM   #13
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+1 I find the Bosch valve sound great...plus getting a hookup from a tech @ Audi even sweetened the deal...OP do you have any sound clips?
No, just take a hammer and hit an anvil there is your sound. Itís an extremely audible ping.
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Old 05-01-2008, 05:01 PM   #14
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too late.. it was installed per the "destructions" and it failed..

The 007 is a direct replacement for the valves used on the VAG 1.8T, so I don't know what instructions you are referring to. Which happens to be the Bosch 25mm valve. The OEM unit is installed on the 1.8Ts with boost entering the side port and exiting the bottom, this is how the 007 should be installed. The face of the piston on the 007 is concave, the sound you are hearing is air whistling across this depression.


The valve will work either way but it will make that sound if you install it with boost entering the bottom. There is a huge group amongst the VAG guys that install them "reversed" for the sound...

Regardless, we offer a lifetime satisfaction guarantee so if you aren't happy, which you obviously aren't, you can return it for a refund. Even though, from what I can tell, you had the thing installed "wrong".
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Old 05-01-2008, 05:12 PM   #15
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I vote for a reinstall with video comparison.
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Old 05-01-2008, 05:25 PM   #16
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The 007 is a direct replacement for the valves used on the VAG 1.8T, so I don't know what instructions you are referring to. Which happens to be the Bosch 25mm valve. The OEM unit is installed on the 1.8Ts with boost entering the side port and exiting the bottom, this is how the 007 should be installed. The face of the piston on the 007 is concave, the sound you are hearing is air whistling across this depression.


The valve will work either way but it will make that sound if you install it with boost entering the bottom. There is a huge group amongst the VAG guys that install them "reversed" for the sound...

Regardless, we offer a lifetime satisfaction guarantee so if you aren't happy, which you obviously aren't, you can return it for a refund. Even though, from what I can tell, you had the thing installed "wrong".
The instructions that were in the box clearly show in pictures which way to install if you have any knowledge of VWs which I do and so does the VW tech that was with me. It's not a sound that could be made by air. Itís a sound that could only be made by metal hitting metal. He has installed tons of Forge Valves (we even used the soap trick) and he has never heard this sound coming from one before installed either direction.

Itís nice of you to assume Iím screwing up and not your product.
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Old 05-01-2008, 05:28 PM   #17
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I vote for a reinstall with video comparison.
**** it. it's not worth my time. I had to reroute my Bypass hose because the Perrin is set up differently.
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Old 05-01-2008, 05:30 PM   #18
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If these guys don't know how to install a forge Bypass then who the hell would??

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Old 05-01-2008, 06:19 PM   #19
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Quote:
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The valve will work either way but it will make that sound if you install it with boost entering the bottom. There is a huge group amongst the VAG guys that install them "reversed" for the sound...
Hmmm.... This is a timely thread for me. I need to try mine both ways and see what I like better. Right now I have the boost entering the bottom and it makes a sound that could be described as a ring. It is kind of annoying and I would like to get rid of it. If changing the valve configuration makes a significant difference in the sound I will try to do a before-after video clip. Don't hold your breath though as I may not get to it for a week or so.
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Old 05-01-2008, 06:30 PM   #20
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I just got home and opened up the valve. It appears to be missing one of the O-Rings. Correct me if i'm worng but it should have two in the main body and one sealing the top?

This service PDF shows an 006 so it might be different.

http://www.forgemotorsport.com/valve_service.pdf
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