Injection Nozzles

The injection nozzles spray fuel into a prechamber as each compression stroke occurs. Each nozzle has a fuel supply and return line. Nozzles can be disassembled, cleaned and adjusted to correct defective spray patterns. See Fig 1.

Fig 1: Exploded View of Fuel Injection Nozzle

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Shims are used to correct nozzle opening pressures, and are available in 43 sizes in increments of .001" (.025 mm) from .035-.077" (0.9-1.95 mm). Changing one size nozzle shim will change injection pressure by 50 psi (3.5 kg/cm² ). Never use more than one shim.