2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

BOV won't vent [88 TII]

Old Jul 31, 2008 | 09:36 PM
  #1  
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From: Hartford, Michigan
BOV won't vent [88 TII]

I'm using an HKS SSQV, which is hooked up to the factory vacuum port for the OEM bypass valve.

No matter how loose I set the spring tension, I can't get it to vent, all I hear is a bunch of compressor surge.

Help?

-Richard-
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Old Jul 31, 2008 | 09:45 PM
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drill and tap your ACV blockoff plate if you have one. That's what I do. use a 1/8 NPT tap for the hole. I have my Greddy BOV tightened almost all the way down and it holds 14+ psi (pressure test confirmed) and always blows off.

Or tap it off the lowest port on the front of the UIM, that is a better source.
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Old Jul 31, 2008 | 09:58 PM
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Originally Posted by arghx
drill and tap your ACV blockoff plate if you have one. That's what I do. use a 1/8 NPT tap for the hole. I have my Greddy BOV tightened almost all the way down and it holds 14+ psi (pressure test confirmed) and always blows off.

Or tap it off the lowest port on the front of the UIM, that is a better source.
So you're thinking the vacuum signal isn't strong enough?

I just bought a set of blockoff plates from Banzai Racing, will be sure to tap into the ACV plate.

-Richard-
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Old Aug 1, 2008 | 02:27 PM
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Throw away the BOV and enjoy the sweet sound of "compressor surge"
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Old Aug 1, 2008 | 06:00 PM
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stuff the blow off valve, i loovvee compressor surge

search "VL turbo dose" on youtube and u will know wat im talking about...

Carl
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