i agree whole-heartedly. also, they are supposedly supposed to reduce hesitancy in carbs and make better throttle response... bs...
in my mind....
the way n/a motors work is by creating a vacuum that draws the air into the cylinder (and, in the case of a 2 stroke, the crank case). the slide in the carb is there to create a great hindrance to this flow of air, if it was not there, you would not be able to idle, it would just run balls to the wall till she blew. so, when the slide is closed, the crank and boost bottle (when installed) are under a great vaccuum. when the slide is cracked open, the boost bottle is going to combat the cylinder to try to get some of that air, b/c it is also under a lower pressure, so the bottle will have to fill before the cylinder can get it's full share, creating bad throttle response and hesitancy.... also when you close the throttle the boost bottle will have some air/fuel in it that the cylinder will then suck out, meaning that the throttle response is not only worsened when you get on the throttle, but also when you leave off.....
if anyone actually read that, is that the way it works in ur mind too?