Gfb Bov - 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 02-08-2007, 10:03 PM   #1
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Default Gfb Bov

Hey guys, got my FM II tuned today (link ecu) and I was wondering if anyone knew about the GFB BOV that FM uses. Can I turn it from hard to soft? If I can do you know where the screw is located? It doesn't sound like just a whoosh sound. It is more of about 3 or 4 sounds. I have heard from some ppl that there is a style of BOV that does in fact sound like that, and that it isn't compressor surge. Can someone help me with this?
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Old 02-08-2007, 10:12 PM   #2
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I had the GFB on my Mazdaspeed for a few months. Yes you can adjust the spring tension; the vac line fitting has a retainer nut on it. You can loosen or tighten it. FWIW, my GFB never vented fully in sub 10 pound boost. I did experience a decent amount of compressor surge (sounded like a chug-chug-woosh). I have had the HKS SSQV now for almost a year w/out any half-vent problems.

Brent
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Old 02-08-2007, 10:16 PM   #3
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thx ima go fiddle with it
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