When boosting the horsepower on the Yamaha SHO four stroke fuel injected engine, whether using high compression pistons, cams, or higher ratio supercharger compressor wheels, it will be necessary to increase the fuel flow delivery. The OEM Yamaha SHO injectors have been precision flow rate tested to be 80 percent peaked on stock units at sea level without modifications. R&D offers high performance fuel injectors with a higher atomization spray pattern that are easily capable of delivering fuel flow specifications to accommodate up to 400 horsepower!
R&D has flow rate tested the O.E.M. Yamaha SHO injectors and verified them to flow 396 cc at 43 PSI of fuel pressure, which rates them to flow 39 pounds of fuel per hour. The R&D High Performance Fuel Injectors have been precision flow rate tested to 525cc at 43 PSI of fuel pressure, and 625cc at 70 PSI of fuel pressure, which rates them to flow as much as 62 pounds of fuel per hour. R&D High Performance Injectors have been flow rate tested to perform excellent, delivering precise fuel flow at fuel pressure ratings ranging from 40 to 80 PSI. Each R&D high Performance Fuel Injector Kit will come packaged with vital flow test rating information that will be broken down specifically in five pound increments in fuel pressure to give the fuel flow delivery amounts in cubic centimeters and overall pounds of fuel per hour. This fuel pressure/fuel flow table information will help in tuning fuel pressure to match the engines fuel flow needs based on horsepower gains over stock. R&D offers only the highest quality fuel injectors, fuel pressure regulators, and fuel management accessories, for all your engine management needs.
