Patent ID: 6955163

Claim:
An injection plate for positioning in a stream of fuel and air moving from a carburetor to the inlets of fuel runners of an internal combustion engine for injecting fuel and nitrous oxide into the fuel runners, said injection plate comprising: a frame defining a frame opening for surrounding the stream moving from the carburetor, said frame having a fuel passage and a nitrous oxide passage; a fuel injection tube extending across said frame opening and mounted at its ends to said frame and having an external surface and an internal passage in communication with said fuel passage of said frame; a nitrous oxide injection tube extending across said frame opening and mounted at its ends to said frame and having an external surface and an internal passage in communication with said nitrous oxide passage of said frame; a plurality of nitrous oxide delivery ports formed in said nitrous oxide injection tube, each said nitrous oxide delivery port configured to direct nitrous oxide in a direction to flow toward the inlet of one of the runners, and wherein said nitrous oxide delivery ports are characterized by having been formed by a ball nose end mill and a rectilinear bit.