Originally Posted by
Raleighcopter
it's the same units that chris used when he said the .40 cid engine had a .2 orifice, probably millimeters since only america uses Inch-pound. all I did was scale the orifice area linearly with respect to engine displacement, remembering that on our twins, the displacement is twice the fuel flow rate since both intake cycles happen at different times.
Ya... the jet size is a simple metric id measurement in MM - Not an accepted jet measurement - Im using a short "choked Bore" of a 3D printing nozzle as the "blank" so they seem to react quite lineally in our application as Ratio of area = avalible fuel.