Turbosmart Vee port or Dual port?

[Boosted Esky]

Hi. Which is the better valve?  What are the main differences between them and reasons for preferring one over the other. Thanks

[WMDC35]

Vee is atmo, dual is atmo, plumb back or 50/50, if the car is pretty std and runs an afm you really want plumb back, if that's the case why change the std bov

[Boosted Esky]

The car is a custom build.  No AFM. I currently have a Turbosmart Kompact dual port in 25mm but it's on the turbo side of the intercooler and I get a little bit of mid rpm surge. I'm about to upgrade the turbo and go from 300hp 20psi to 350hp 25psi so I'm thinking 32mm Dual Port before the throttle body with a plumb back pipe, running in 50/50 config. I noticed my current valve performed a lot better in 50/50 config (less surge) compared to full plumb back. Another reason I'm leaning towards the dual port is to keep the police happy if I have to pop the bonnet. If I keep the BOV blanking cap in my toolbox it can easily be fitted if it got picked on. The cars build date is 1980, I have read somewhere that atmo vented BOVs are ok for older vehicles but I'm not certain what year that goes back to.  Thanks