E30 Zone

I am about to supercharge my M50. I have recently bought this charger with pretty much everything else I need to complete the project.

The charger originally came from Dinan with a purge valve (I didn't get this with the rest of the bits). There is no room on the e30 to fit this, so I plan to run without it and use a recirculating BOV after the charger and back to the intake.

In the picture below you will see a large threaded hole, this is where the purge valve would have been. Should I plug this hole with a bolt, or leave it open?..... Thinking I should plug it, but not sure??

I said to you before mate it was run on my car with this hole exactly as it is in this pic no problem
He did have a recirculation dump valve fitted but I removed this ashortly before I sold this setup. And it was fine
I don't know about this purge valve because this is how it came when I bought the car see