What do the metering jets do?
Unlike other brands, our jets are stamped with flow rate numbers to make the tuning process more accurate and much easier, than relying on just the jet diameters. The ‘theoretical’ power rating of a given jet (@ 950 psi) in a WON system is half the number stamped on the nitrous jet, which means a jet stamped with 100 will make 50 hp, while a jet stamped with 200 will make 100 hp, and so on. On the fuel side we always recommend a safe rich starting ratio of 2:1 for fuel injection and 1:1 for low pressure carburettor applications. This translates into using a 50 fuel jet with a 100 nitrous jet if fuel injected and a 100 fuel jet with a 100 nitrous jet if using carburettors and low fuel pressure. Then if you need to go leaner with a 3:1 ratio for instance on a fuel injection motor, you would use a 33.3 (round up to a 35 jet) on the fuel side for the same 100 nitrous jet. After appropriate mixture adjustment has determined the optimum fuel & nitrous jet sizes at a low power level, it is th
