SR1002 Fuel Pressure Regulator Adjustable EFI - Polished

FEATURES:

Accommodates standard and aftermarket EFI fuel pumps
1:1 Rising Rate
Turbo and naturally aspirated applications
Includes 1/4" line fittings
1/8: - 27 NPTF auxiliary port ideal for SG100 Series Fuel Pressure Gauge
Billet CNC aluminium
Minimum Flow @ Outlet: 300 LPH (80 GPH) using Bosch 040 EFI Pump as benchmark
Operating Range 200 - 650 KPA (30 - 95 PSI)
Adjustment via the 360-degree top nut
Compatible with Ethanol based fuels
Also Available in Black (SR1001) 

About the 1:1 Rising Rate Ratio

This is the ratio between boost pressure and fuel pressure increase. A 1:1 ratio means that for every 1 PSI increase in boost pressure, fuel pressure will also increase by 1 PSI to ensure that the pressure differential between the inlet and outlet of the injector is constant. Effectively, injectors are solenoid valves which open and close when power is applied to them.

If fuel pressure is too high, the injector solenoid will not have enough energy to open the valve fully causing the engine to starve of fuel. It is essential to maintain a constant pressure differential between the inlet and outlet of the injector and hence why a 1:1 ratio is ideal.