Ok kewl...
I'm going to try to get someone that has more money then me involved and see about mass prodicing such a thing. the weight is about 5 to 10 oz total including all the extra pipes... it will depend on the scale of the plane.. larger planes will require more weight.. I did this on an Edge 540 60-90 size with a 108 on it and a small home made smoke system. My small version is 4oz total.
the engine seems to always run the same no matter what the condition is because the pressure is always the same.