After market recirc valve will keep a happier engine over time in my experience Never liked vent to atmosphere's as they vent registered air rather than putting it through the engine like the OE set-up intends and stops over fueling. But if you still want the dump valve woosh, then a cone filter will give that sound
...And there is no problem with that buddy! Despite the 'interesting' appearance, I have driven my other half Uncles Juke and it was lovely. Comfy, nippy enough and good fuel economy. Handled well too!
I can only speak about what I know (GTRs) but the afms are certainly capable of running atmospheric BOVs.
The stock recircs dont like much boost over stock so bovs are a well documented mod.
Maybe twin turbo set ups are different
When I still had a stock motor and installed a BOV it drove ok driving normally in traffic but if I got up it and reved it and backed off to change gears if would splutter/hesitate for a bit when I got back on the gas .
This was due volume of air to the AFM told the computer that it had passed was way less due to the bov venting to atmosphere so the hesitation was due to overfueling
Surely that is isnt really an actual bov fault but more an ecu/system fault . The bov is working but the system is not giving enough information to the ecu
Maybe the gtr ecus can cope with that issue because they have a throttle position sensor which possibly overides the afm readings when the throttles off . It must be something like that because my car ran spot on with afms, bovs and a stock ecu
Brian you have to remember it was an 85 car with a distributor and a 2 injector throttle body factory injection and the problem/overfueling went away when I had the Haltec installed and the AFM binned and MAP sensor fitted to the plenum .
It may be that the Nissan computers were more advanced than my Mitsubishi
They are probably a different "generation" as far as technology is concerned
When it came out in 1989 the 32gtr was very advanced for its day and even with the car " limited" by a simple boost restrictor it produced well over 100bhp per litre with twin turbo , awd , rear wheel steering with pretty much everything ran by computers so I suspect they solved that overfuelling issue as well