Do I have this Begi (Bosch?) bypass valve hookup up correctly? It leaks - Miata Turbo Forum - Boost cars, acquire cats.

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Old 03-18-2009, 05:13 PM   #1
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Default Do I have this Begi (Bosch?) bypass valve hookup up correctly? It leaks

Referring to this bypass valve:
BEGI Miata turbo Bypass Valve - 1 3/8" BEGi

Assuming the connection where you put the vacuum line is the top of the unit, I have the bottom connection of the unit tied into my intake piping (after IC, before TB). The side connection goes back into my intake before the turbo. I tested my IC system for leaks and there is air coming past the valve (so basically air moving from the bottom connection to the side connection past the internal valve). Do I have this hooked up correctly and should it be leaking like this? I don't see anyway to adjust it, is it non-adjustable? Is there an OEM bypass valve I can pick up at a local parts store that will work for my purposes if in fact I do have it hooked up correctly and it should not be leaking air as I described and is broken? Thanks!
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Old 03-18-2009, 09:46 PM   #2
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Can you post a photo?
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Old 03-18-2009, 11:16 PM   #3
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sorry, camera problems, but I think I have it connected correctly based on some photos I recently found on the Begi site...is there a way to tighted the valve so the piston isn't pushed up by boost? it might be ok because I'm probably pushing over 20psi with my little compressor I'm using to test for boost leak so I'm hoping during normal operation (10/12 psi) there will be no leak-woudl be nice if I could adjust it but I'm guessing tension on the piston is fixed. thanks.
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Old 03-18-2009, 11:29 PM   #4
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I thought the side connection went to boost, and the other went to vaccuum and a port on the intake mani.
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Old 03-19-2009, 12:38 AM   #5
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well, this is the pic I found which makes me think I have it installed correctly...boost to bottom port and side vents back into intake.

http://www.bellengineering.net/image...sairmeter1.JPG
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Old 03-19-2009, 01:02 AM   #6
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this one confuses me then, because the boost is to the side port. you can tell since the alternator is right there. http://www.bellengineering.net/image...assvalve_2.jpg
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Old 03-19-2009, 03:32 AM   #7
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I know there was a thread on this maybe about ~8 months ago and was resolved. If you search, you might be able to find it.
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Old 03-19-2009, 01:39 PM   #8
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Quote:
Originally Posted by scottv View Post
well, this is the pic I found which makes me think I have it installed correctly...boost to bottom port and side vents back into intake.

http://www.bellengineering.net/image...sairmeter1.JPG
This is correct for all 94+ Cars. The arrow needs to point towards the throttle body.

Quote:
Originally Posted by Sam Amporful View Post
this one confuses me then, because the boost is to the side port. you can tell since the alternator is right there. http://www.bellengineering.net/image...assvalve_2.jpg
This is on a 1.6L. The arrow needs to point towards the TBI tube. It is on backwards.
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Old 03-19-2009, 02:41 PM   #9
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Great, thanks everyone!
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Old 03-19-2009, 10:32 PM   #10
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Quote:
Originally Posted by Stephanie Turner View Post
This is on a 1.6L. The arrow needs to point towards the TBI tube. It is on backwards.
Stephanie
Hey Stephanie, which arrow, there are two on mine. I DIYed my kit and im trying to use this thing. Does it pretty much hook up like the 94's and up, but its just placed closer to the TBI pipe?
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