Archives: fuel pressure

Good Fuel Pressure with a New MFI System

Setting up a new MFI fuel system: main bypass adjustment to control the air/fuel ratio adjustment of the combination of the main bypass and nozzle sizes to maintain an optimum fuel pressure range from the lowest to highest engine RPM. Changing the main bypass jet for tuning affects the air to fuel ratio and fuel […]

Simple Fuel Pressure Gauge for Peak Fuel Pressure Reading

We used a simple fuel pressure gauge with a peak hold needle to record our highest fuel pressure value from a run. ¬†The gauge is an all stainless, bottom 1/4NPT pipe, glycerin filled gauge with a maximum indicating needle. Glycerin filling is needed to dampen the needles from racer vibrations. ¬†Stainless is needed for resistance […]