can BOV's be mounted in any position?

i want to mount mine sideways on the intake pipe.

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1971 Datsun 1600 - Z18ET
1996 Suzuki RGV250 VJ22
1996 Suzuki RGV250 SP VJ23

Define sideways? Their orientation makes no different, but the direction they face the flow does. Most mount perpendicular (not the best for flow) without any problems. If your BOV is pushing the small side to vent the amount of air you require during gear changes, you might need to mount it so the air from the intake pipe can better flow into and out of the BOV.

As I understand it anyway.

Dave

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USA Daily: 2014 Nissan GT-R, very minor modifications for the track
USA Project: 1978 280Z, minor suspension upgrades, VK56DE conversion in progress. SOLD
AUS Race Car: 1973 240Z, L28ET, Autronic, GT35R. SOLD
AUS Project: 1972 1600, 3200km old S15 SR20DET, ground up rebuild. SOLD