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Old 12-16-2005, 05:05 PM   #1
GokuRen
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Blow Off Valve Test

Does anybody know of a way to test a blowoff valve without putting it into the car yet? I got a blowoff valve out of a 760 Intercooled Turbo Volvo in a junkyard along with the rest of the turbo parts and accessories. But I wanted to know if there is a way to test it before trying to put it to actual use. Maybe using household supplies, like a bike pump and some rigging?
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Old 12-16-2005, 05:08 PM   #2
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hook it onto a air compressor somehow
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Old 12-16-2005, 05:17 PM   #3
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Well right now, im sitting here with a Air Hand Pump for like a bike. There's 2 tubes on the blow off valve. Inlet and Outlet. Im tryin to attach a picture of it on here, not sure if it'll work or not.
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Old 12-16-2005, 05:22 PM   #4
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good luck
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Old 12-16-2005, 05:23 PM   #5
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your better off buying a brand new aftermarket one if ur not sure how that will hold
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Old 12-16-2005, 05:32 PM   #6
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Not necessarily. I dont know how you'd go about testing one, but if it leaks he should get a new one. If it doesn't leak there's no need, and most likley with the PSI he'll be running, he'll be fine.
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Old 12-16-2005, 06:41 PM   #7
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There should only be one vac hose used to control the valve. Once they see - pressure they open.
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Old 12-16-2005, 06:54 PM   #8
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Neat looking BOV. I don't see a vacuum nipple in the pic so I am assuming the electronics underneath control the opening and closing. You can test it by rigging a cap and vacuum nipple to the inlet portion and pumping it up till you see leakage coming out the other end.

Otherwise, most BOVs have a vacuum nipple that helps control the opening and closing. DSM BOVs will leak around -12 hg mercury at idle and when the pressure differential btw boost and engine vacuum is greater than that difference.
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Old 12-16-2005, 07:58 PM   #9
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Well if the electronics underneath do control the opening and closing of it, how am i supposed to get it to work right with my car?
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Old 12-17-2005, 01:54 AM   #10
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Quote:
Originally Posted by GokuRen
Well if the electronics underneath do control the opening and closing of it, how am i supposed to get it to work right with my car?
I doubt that will happen.

Find yourself a nice cheap BOV. No one wants 2g DSM BOVs so I bet you can almost get them for free. They leak on DSMs but only cause they see a lot of boost. If you want to get a nice quality, cheap BOV get one off a 1g DSM. They normally go for about $50.
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Old 12-17-2005, 04:16 AM   #11
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Thanks for the tip, I think I might be able to get a blow off valve off of a 1987 mitsubishi conquest. my buddy has a black one that he built and it walks away from Z06 vettes. He's had quite a few DSM cars, I'm sure he has a blow off valve laying around that he don't need or want. I'll look into that. Thanks
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