From a DSM board (Google had your answer in 5 seconds)
The small hose you removed from the stock BOV must be connected to the larger nipple on the anodized cap (closest to the adjustment screw.)
(Note: This connects to the intake after the throttle butterfly and will pull vacuum when the throttle is closed)
The smaller nipple on the cast aluminum body of the BOV may be spliced into the turbo outlet pipe or into the line between the turbo and wastgate actuator. Use the T-connector supplied. This connects to pressure even when the other line has vacuum. This will activate the BOV faster by applying pressure under the valve seat.
The smaller nipple may also be left unconnected. The BOV will operate slower and more quietly. I did not test this mode.
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Now, remember, you need to attach a signal hose from the hot pipe to your WASTEGATE...not your BOV. The BOV line comes from the vacuum nipple at the throttle body (so it gets vacuum when you close the throttle and the BOV releases pressure...)
OK?
Eric
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2002 Mazda Protege5
1989 S13 w/SR20DET (sold)
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