I came across this device that able to multiply compress air. And with some R/D, we would be able or not turn this into a mini turbo charger to work in tendem with your turbo? Not sure if this has been explore else where?
In theory is should work? But testing and some modifications will determine if that is the case or not. Ie. It may produce less boost drop for a small turbo? Cooler intake air temperature.

Just for curiosity, I had it installed the 1.125" unit on my moded kn filter. This will to generated more air into the intake during boost. May not needed but it will amplify the intake sound . The draw back is I would need to get the air pressure from the charge pipe. I'd kept the boost leak to a minimal by using the smallest hose barb less then 5/64" I'd. My guess is that it shouldn't effect the boost any from my S256. We shall see when I take her out later.

https://www.nexflow.com/products-category/energy-efficient-blow-off-products/air-amplifiers/

 

So it's kind of like a venturi

 

I am no expert but it is different then venturi. One is increase pressure vs this is more of volume? Someone will correct me if I am wrong. Here is a explanation of coanda effect.
https://www.sciencedirect.com/topics.../coanda-effect

It is strange how this thing works but it does some how from that tiny .002 opening?



Took her out for a spin for the first time in couple of weeks. No boost lost or lag. Is it because I haven't driven the car over a few weeks but she seems to be pulling harder up top to red line?
So I am changing to a marginally larger hose barb 1/8" I'd. From my testing using compress air, the more volume I can feed to it, the higher output volume is the net result. Pressure is a factor as well.