Contour Enthusiasts Group Archives Forums Modifications Forced Induction Direct port Nitrous

If you look at the size of the jets for the single nozzle system so you can get a good idea.
The fuel an air have to be in proportion to. Take the area of the jet and divide it by the number of cylinders. Then divide by PI, take the square root, then multiply by 2 to get back to a diameter of your 'theoretical' circle. This would be the size of the hole you need to drill the jet going into each cylinder.