That's the thing, you can't. You are adding a massive amount of pipework which needs to be filled with exhaust gases which will hurt throttle response, and then you have to compress all the air going all the way back to the front of the car.
It's like putting a piece of paper in front of a fan: Do it right next to it and the paper flies away, do it a meter away and it might flutter past. That's not exactly correct as obviously the air will flow outwards, but you can try the same thing using a tube and then switching the fan on and off to simulate being on/of throttle.