Specific Fuel Pressure Regulator Subaru Impreza WRX / STI - Gold Series - Bonalume RPBWSG

Unlike the adjustable regulator, this model also offers the advantage of having a 1/1.4 ratio. To make you understand better I""ll give you a small example. CLASSIC SYMMETRIC FUEL PRESSURE REGULATOR. PRESS. BENZ. INITIAL SETTING - 3 BAR + TURBINE SUPERCHARGE PRESSURE - 1 BAR = FINAL FUEL PRESSURE RESULT 4 BAR Now in this condition, if we needed to give more fuel to our engine because it runs lean, we should act on the pressure register and increase just enough to bring us into carburetion at medium and high speeds. But if the carburetion was very lean, we would also have to greatly increase the pressure regulation, thus dirtying the low carburetion. (with the obvious consequences of torque losses, pollution, consumption and immediate deterioration of the catalyst.) Therefore we should find a compromise by making do with what we can do. Conclusion: dirty delivery at the bottom, almost good at the mids, and bordering on thin at the highs. With the ASYMMETRIC regulator 1/1.4 this problem disappears, as the percentage of increase is asymmetrical to the turbine pressure, example: PRESS. BENZ. INITIAL CALIBRATION - 3 BAR + TURBINE BOOST PRESSURE 1 BAR = (input of 1.4 bar of petrol pressure) FINAL FUEL PRESSURE RESULT 4.4 BAR In addition to being asymmetrical it is also progressive, so the increase in pressure is proportional even from low turbine pressures, every tenth of a turbine bar will lead to an increase of 1.4 tenths of petrol pressure. Furthermore, it is also adjustable, and is also interchangeable with the original regulator, so no modifications need to be made for assembly. No inconvenient and dangerous pipes loaded with petrol pressure to carry around the engine compartment. MAX FLOW RATE: 3 bar = 270 lh - 4 bar = 220 lh - 5 bar = 190 lh

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