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Tomei Fuel Pressure Regulator - Type L

Tomei Fuel Pressure Regulator - Type L

Product Details

  • Product Code TOMEI-TYPEL
  • Manufacturer Tomei
The Hard Anodizing finish adds more protection to the Regulator since the Regulator will spend it’s time in a harsh environment. This finish helps protect the thick membrane from harmful grit and grime and with the additional resistance to corrosion and heat and electrical insulation these aspects help maximize its durability and safety.
Our Regulators are supplied with 2 of each AN6 and #8 nipple connectors which are the most popular type of fitments for fuel piping. Ready to install and use from the box.
* Depending on your setup you may require additional equipment/parts to complete the install.
* Other piping is required and not included.

When the engine is idling low the fuel flow used compared to full power is only approx 15%. Therefore most of the fuel that is sent by the pump will be returned to the fuel tank. When the engine is tuned the optimum efficiency can be obtained with the optimum mixture of A/F ratio. When the fuel pump is too large and the regulator is not strong enough to handle the excess fuel that it is receiving it will then not be able to regulate the flow to allow the fuel to return to the tank. This will cause the fuel pressure to be too high and too much fuel to be pumped into the engine which will lead to over enrichment and poor fuel efficiency and a variety of problems will occur.

The balance of pressure inside the regulator (Pf+Pm=F/S) maintains the fuel pressure from when the valve opens by the pressure in the intake manifold.


2500 3.82 0.70 3.12
3000 4.49 1.42 3.07
3500 4.53 1.47 3.06
4000 4.48 1.47 3.01
4500 4.46 1.45 3.01
5000 4.42 1.44 2.98
5500 4.39 1.41 2.98
6000 4.33 1.38 2.95
6500 4.26 1.30 2.96
7000 4.20 1.25 2.95


Fuel Pressure Regulators