**Twin Turbo 67 Dart Project**

Why does it have to stick out? If it's the same diameter of the pulley a bracket could be made to place the sensor close enough without contact (assuming you pulley has the space like in the pic above)

And why does it need to stick out .5 all the way arround? I would think that .125 or 1/8th would be enough that would mean the ring would only need to be a 7.5 in diameter.