For testing, the injectors are wired up to an electric injector tester, which is one of the few off-the-shelf components in the build. The fuel pump and injectors are powered by the 12 volt rail ...

Chris-Marine launhced its latest innovation, the VPU 1600, a fuel injector test unit for 4-stroke engines, manufactured at its facility in Brøndby… ...

When you get into five-figure RPM territory, fuel injectors aren't so much firing individually as much as they're spraying fuel constantly.