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Old 03-30-2018, 02:49 PM   #1
LeedomtoFreedom
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Default Diverter valve

I've read a lot of the threads about stalling when using a BOV on LH2.4. A lot of people say that they've gotten it to work but I have another angle.

I've got one of these vw/saab style diverter valves that I'm considering using. I don't care for the choo choo sound and don't want to mess around with stalling.

https://www.fcpeuro.com/products/aud...lve-06a145710n

Can I plumb this up without any issues?
This is for an hx35 so using the mitsu cbv is out of the picture.
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Old 03-30-2018, 03:20 PM   #2
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Yes, that diverter valve operates on the same principle as the Mitsubishi CBV...recirculating air back to the pre-turbo inlet...on the Mitsu turbos the diverter valve is essentially built into the compressor housing.

http://forums.turbobricks.com/showthread.php?t=137666
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Old 03-30-2018, 03:45 PM   #3
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I'm assume you're not going to be running low boost. Why not turboxs or forge bov? They carry bovs that will recirculate. I'm running a turboxs and it works great. It generally is lower priced than a forge bov.
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Old 03-30-2018, 04:13 PM   #4
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Funny, last weekend I pulled the same looking diverter valve from a Saab 2.3t in a junkyard. I plan to use it with a slightly bigger T3 I just rebuilt. I see no reason why it wouldn't work
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Old 03-30-2018, 05:06 PM   #5
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One of the comments mentioned the flutter at 15psi. Is there any way I can hack this one to remedy that? maybe a stiffer spring or some spacers.

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Why not turboxs or forge bov?
Because I'm cheap
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Old 03-30-2018, 05:56 PM   #6
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One of the comments mentioned the flutter at 15psi. Is there any way I can hack this one to remedy that? maybe a stiffer spring or some spacers.
I don't think it can be opened without damaging it. Mine looks like it's friction welded together
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Old 03-30-2018, 06:51 PM   #7
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Quote:
Originally Posted by esmth View Post
Funny, last weekend I pulled the same looking diverter valve from a Saab 2.3t in a junkyard. I plan to use it with a slightly bigger T3 I just rebuilt. I see no reason why it wouldn't work
What's the part number of that Saab valve? 103 leaks at I think 10psi. 108, 110, 113 are the good ones.
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Old 03-30-2018, 08:29 PM   #8
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Holy **** you make a lot of threads
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I've got a real issue with you Wilford
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Old 03-30-2018, 08:30 PM   #9
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I vent mine to atmos with a greddy type s, its fine
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Old 03-30-2018, 09:02 PM   #10
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Quote:
Originally Posted by tryingbe View Post
What's the part number of that Saab valve? 103 leaks at I think 10psi. 108, 110, 113 are the good ones.
it's a bosch 0 280 142 110
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Old 03-30-2018, 09:07 PM   #11
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Edited my sig, thanks wilford. I like to ask questions

I've got a 114. I'd be surprised to see how it performs. I'll probably just use it and if it leaks or something, then step up to something bigger.
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Old 04-01-2018, 05:59 PM   #12
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I have amm coldside though
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Old 04-01-2018, 10:14 PM   #13
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Quote:
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Holy **** you make a lot of threads
I'm glad. It makes it so all of my idiotic questions have company.
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Old 04-02-2018, 12:31 AM   #14
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Quote:
Originally Posted by Wilford Brimley View Post
I have amm coldside though
Does that help with the stalling issue?


Quote:
Originally Posted by EivlEvo View Post
I'm glad. It makes it so all of my idiotic questions have company.
likewise
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Old 04-02-2018, 01:10 AM   #15
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Quote:
Originally Posted by LeedomtoFreedom View Post
Does that help with the stalling issue?
.....yeah, search.
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Old 04-02-2018, 06:35 AM   #16
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Type into google...
site:tbforums.com "search terms"
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Old 04-11-2018, 11:31 PM   #17
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Do you guys think I can use this valve to vent to atmosphere ? Or would it not work well.
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Old 04-11-2018, 11:33 PM   #18
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Works best with maf coldside, other wise it'll probably stall on blowoff...been discussed a ton already
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Old 04-12-2018, 09:37 AM   #19
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I know, I was just checking because I've heard people have issues using recirc valves as bovs.
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Old 04-12-2018, 10:38 AM   #20
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The issue is with the venting MAF metered air to atmosphere, be it through a “blow off valve” or a recirculating valve that is venting to atmosphere...nothing to do with the piece of hardware that does it.

If you put the MAF in the cold side piping (after intercooler) as Wilford stated it can lessen the impact of venting charge air to atmosphere....but IMO begs the question, why? FWIW, if it’s turbo noise you are after, you can clearly hear the recirculating noise on a stock car with a cone filter.
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Old 04-12-2018, 11:31 AM   #21
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Quote:
originally posted by Me in the OP
I don't care for the choo choo sound
It's just less plumbing for me. This is my only car and I need it functioning as I have school and work every day of the week. Forgive me for trying to cut corners. I'm just working with what I got.
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Old 04-12-2018, 11:32 AM   #22
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I'll try to hook up a closed system with what I have
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Old 04-12-2018, 12:57 PM   #23
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No the valve won't work as a blow off, it is open when the car is idling. at least mine is
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Old 04-12-2018, 02:16 PM   #24
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Okay thanks
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Old 04-12-2018, 04:10 PM   #25
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Take a look around at the way the recirculating valve is done on a 240 turbo Group A car. They use a high pressure version of that valve. The Saab valve is ok but it is only rubber inside. So it won't stand up to high boost and isn't worth messing with. If you want to stay with a production car part. Use the Porsche 911 turbo valve. It looks like the Saab valve but has a metal insert to help it work with higher boost. They are not expensive. Something for a 1993 911 turbo would work. I forget the part but it is easy to find.

I eventually upgraded to the Saab Forge valve. It too is a sealed valve and replaces the above ones without any changes.
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