My knockoff Greddy-S BOV leaks at idle. - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

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DIY Turbo Discussion greddy on a 1.8? homebrew kit?

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Old 09-25-2006, 03:37 PM   #21
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did you hook up both vacuum lines? even with booth hooked up my REAL greddy type-s would leak at idle, enough that I could feel it on my palm at idle, but not enough that I could idle without trouble. I ran it for about a month VTA without a check valve with no trouble or idle droop.


I'm using copper plumbing 45*s and heater hose.
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Old 09-25-2006, 04:14 PM   #22
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Originally Posted by samnavy View Post
Hijack:
Where did you get the black tubing for the intake tract?
Ebay.

I searched again to link to it, but I can't find it. "My Ebay" link is no longer valid because I bought it too long ago.
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Old 09-25-2006, 04:16 PM   #23
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Originally Posted by Splitime View Post
Last I checked, the greddy bov's are normally open while idling. Some people go so far as to filter their opening.
That's what i'm thinking. I'd much rather reroute it than filter though. Thanks
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Old 09-25-2006, 04:18 PM   #24
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Originally Posted by jayc72 View Post
Can you rotate the pipe that the BOV sits on at all? That's what I meant when I said rotate it down.
Damn, thats a good idea. That just might work.
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Old 09-25-2006, 04:20 PM   #25
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Originally Posted by Stripes View Post
If you're looking for ideas on how to run your BOV tubing, his is how I ran my recirculated BOV.
Stripes. That's ridiculously clean. Me like.

Last edited by UofACATS; 09-26-2006 at 12:13 PM.
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Old 09-25-2006, 04:24 PM   #26
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Originally Posted by Joe Perez View Post
I know it sounds a bit ghetto
Joe Perez, 007. Hey, man, sounds good to me.
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Old 09-25-2006, 04:27 PM   #27
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Originally Posted by Splitime View Post
Whats with all the turbo miatas without the coolant reroutes i'm seeing lately?
I just started seeing info on this. If you have any good links, I'd love to see them. Thanks man.
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Old 09-25-2006, 04:31 PM   #28
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Originally Posted by braineack View Post
did you hook up both vacuum lines? even with booth hooked up my REAL greddy type-s would leak at idle, enough that I could feel it on my palm at idle, but not enough that I could idle without trouble. I ran it for about a month VTA without a check valve with no trouble or idle droop.


I'm using copper plumbing 45*s and heater hose.
Damn, I post a lot

Both vacuum lines are hooked up. It does idle ok, it's not going to stall or anything. Question is, does it stop leaking under boost? Don't want to think about that unmetered air entering the system.

Sounds like it works temporarily, which is all I need. THANKS everyone.
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Old 09-25-2006, 04:55 PM   #29
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If it leaks under boost it's going to push air out, so you'd be running rich not lean.
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Old 09-25-2006, 06:05 PM   #30
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Originally Posted by UofACATS View Post
Damn, I post a lot

Both vacuum lines are hooked up. It does idle ok, it's not going to stall or anything. Question is, does it stop leaking under boost? Don't want to think about that unmetered air entering the system.

Sounds like it works temporarily, which is all I need. THANKS everyone.

3/4" metal check valve from home depot. In the plumbing or water systems section.

Or

http://www.jgstools.com/turbo/oav.html
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Old 09-25-2006, 08:43 PM   #31
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I have a greddy type RS bov and I have it venting to the atmosphere and it doesn't leak nor does it idle drop.
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Old 09-25-2006, 11:13 PM   #32
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Originally Posted by braineack View Post
3/4" metal check valve from home depot. In the plumbing or water systems section.

Or

http://www.jgstools.com/turbo/oav.html
Nice, cheap solution. I'll rock that until I get around to routing it.
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Old 09-29-2006, 08:56 PM   #33
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Originally Posted by UofACATS View Post
I thought it was the vacuum line to the manifold sucking in air through the bov. ???
That was it.

Unhooked and plugged the vacuum line from the manifold and the car idles perfectly. So, fellas, it leaks through the top, not the bottom, i.e. tightening the preload does nothing.
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