One Way Valve for BOV????

[Sil240]

Does anyone know of a 2-2.5" tubular one way valve I could use for my BOV. It's constantly sucking air at idle.

Kinda like a pcv valve except I don't want a Ball valve.I would only assume that a ball valve would kill the flow and make my turbo surge.

Maybe if they had something with 2 V type doors.

-------------------------------------------> \------------>\------------> \-------------> \ One way flow --------->------------- >/------------->/------------>/----------->/------------------------------------
Modified by Sil240 at 6:45 PM 8/17/2009

[Darius]

What you are thinking of is called a split disc check valve. They are typically used in large air supply applications. You can't really use a check valve in this appication because it will only prevent reversion into the charge piping. When you start to build boost, all the boost pressure will be lost out of the check valve.

Is this a Tial BOV? Are you running a blow-thru MAF setup?

[Sil240]

Sorry... I forgot to tell you where I wanted to use it.

I have a Old school HKS racing Bypass valve and it looks like you could put a hose on it, but my BOV is behind my Pass side headlight and the Maf is on the otherside.

I don't want to run a huge ugly hose across my engine bay.So what I was thinking was to solve the idle problem and put a 1 way valve on the discharge of my BOV.

That way at Idle it would be totally shut, but could still release when the BOV goes off.

[Darius]

Yep. I think I see what you're saying. You want to run the standard MAF location with a check valve on the discharge side of the BOV. I don't see why this won't work as long as the BOV stays closed under boost.

[240z4u]

That BOV is supposed to hang open @ idle. Why not just get one that does what you want it to do? Sell the one you have and buy something different.

[20DET]

yea tru dat...they hang at idle and then wen u rev it up it seals up....if u dont want one that does that then get a piston type bov with a harder spring so it doesnt leak!!!!!

[Sil240]

That would be the easier way to go.But I like my BOV.It's different plus sounds good.And if I can get this 1 way valve for cheap then I'd be happy.

I did put a whole bunch of washers in the spring to up the rate and it helped a lot, but still open a little bit.

But... if the Synchronic BOV would fit the Greddy 2 bolt flange, I'd hop on it.

[20DET]

u can just make up an adapter to adapt bovs aye bro!!!!!

[240z4u]

I think there might be a premade adapter for that.

[20DET]

yea or just make one /get one made if not...u need some steel and a welder and a drill lol not hard

[Sil240]

Didn't know this existed.I guess after I get tuned I'll swap it out.More important thing for $$ to go to.

Anyone know where I can get this valve for now?Or I'll just deal with it and stop being a baby.

FOUND:http://www.turbochargers.com/s.../1830

[20DET]

u do realise that the synchronic bov works just like the hks bov as they are both pull type bovs that use the boost pressure to seal?? u will have the same problem u are having with ur hks valve lol

[Sil240]

Really...??I thought that was the difference of that valve and others.

I might as well keep the one I have.

The search for the 1 way valve is still on.

[20DET]

y not just get a piston type valve and put washers in to tighten the spring?a push valve instead of pull valve

[Kansei240sx]

^---- You are misleading him.

IF anything, pull type Blow off valves are the only type of blow off valve you should EVER use if you're running unrecirc. The more boost you apply the more it seals. All push type piston valves do is be s***ty and leak, putting washers in there to make it seal better is ghetto and a waste of time. Push types are good for recirculating like they are factory, because all bypass valves are recirculated back to the intake snorkel/hose to begin with.

If you want to keep your valve, fabricate something to recirculate the valve back to your intake or run a blow through setup with the MAF post blow off valve on a very straight unbent pipe to avoid air turbulence. That bov you have was designed for the purpose of being recirculated, dont defeat its purpose just because you dont want some "ugly hose" across the engine bay. Theres always a way to get around "ugly" trust me lol.

the Z31 vg30et uses a 1 way 11psi rated pop off valve on the intake manifold that is vented to atmosphere. You can shim the valve or install a new spring to uprate the pressure to hold higher, but most people remove it and install a threaded block off. If you're die hard on that route i assume you could weld a fitting for that large threaded beast into your intercooler pipe system with a recirculated hose or just a vent to atmosphere.

Modified by Kansei240sx at 10:58 PM 8/18/2009
Modified by Kansei240sx at 11:10 PM 8/18/2009

[Sil240]

I finally got around to addressing this problem.I started searching on the Ho-Depot website.They have these pluming 1 way swing valves.

Under vacuum it sucks it closed and when I blow off it pushes it open.The only problem I see is that it is a small diameter.But I lossen up my BOV almost all the way and there is not compressor surge/flutter. :-)

It only cost me $10 for the vavle and the rubber reducer coupler.

http://www.homedepot.com/h_d1/...10053



It was a bit long to fit where I needed it to be.So I had to cut it down a bit.



Here's the BOV side of the valve:



Here's the Atmosphere side of the valve:

[240z4u]

That should change the sound of the BOV quite a bit I imagine. Hopefully it doesn't sound like a fat person farting.

Your gonna have to keep that thing clean, can you find a filter to slip over the end?

[Sil240]

HAHAHAHA lolz

No, it didn't change it much to my surprise.It did get a tiny bit quieter, but its still kinda loud.

This HKS Bypass valve didn't have much of a sound. It is mostly just the a sound of rushing air, no chirps or whistles.The Valve just added a more of a SSSHHHHH sound.

I could stick a filter on the end of it, but I don't think I'll need to.I may need to rinse out the valve every once in a while, but no biggie.It fits on pretty easily and is very accessible.

Check out my LS2 Truck Coil thread, there's a Youtube vid there. You can hear the BOV without the valve.That high pitched whistle/squeal is the BOV slightly open.

[SullivanRacing06]

dose it have a adjustment screw on it you could tighten?

[Sil240]

Yeah it does have a adjustment screw.I also added some washers in there.But if I tighten it down too much it'll start to surge.

Here is a pic of the BOV i'm running: