Fuel Supply

Fuel Supply

Fuel

The engine is designed for operation with unleaded Premium Plus fuel (RON 98), (RON 95 with restricted performance).

Fuel Tank

The tank of the new 911 Turbo corresponds to that of the current 911 Carrera 4 models. With a refill volume of approx. 17.6 gals. (67 liter), this has a capacity of approx. 0.75 gal. (3 liter) more than the tank of the 911 Turbo (996). The fuel level for the fuel reserve is 2.6 gals. (12 liters). The 911 Turbo (997) still has a return line from the pressure regulator in the engine compartment to the fuel tank. The battery and the battery tray must be removed in order to access the new position of the return line connection.







Fuel Pumps







The fuel tank of the 911 Turbo (997) has 2 fuel pumps which are integrated into the common pump chamber (tandem pump). The fuel pump 1 delivers 1 qt. (1.1 liters) in 30 seconds, and fuel pump 2 delivers 1.4 qts. (1.5 liters) in 30 seconds. The two fuel pump relays are activated as required by way of switching points in the DME control unit.

Fuel pump 1 runs with a tank content of less than 13.7 gal. (52 liters). Fuel pump 2 is activated when a computed fuel requirement of greater than 26 gal/h (100 l/h).

Fuel pump 2 runs with a tank content of greater than 13.7 gal (52 liters). Fuel pump 1 is activated when a computed fuel requirement of greater than 37 gal/h (140 l/h).

The fuel is pumped out of the tank pockets by the two sucking jet pumps. The high-pressure sucking jet pump on the right side of the vehicle is supplied only by fuel pump 1. The low-pressure sucking jet pump on the left side of the vehicle is operated by one or both pumps depending on the fuel level and load condition. The quantity of fuel delivered by both fuel pumps can be checked as described in the Technical Data.

Fuel Filter







The fuel filter is located on the left-hand side of the engine compartment and must be changed every 60,000 miles (90,000 km) or after 6 years.

Fuel Pressure Regulator

The fuel pressure regulator is installed on the fuel distributor rail on the right (cylinder row 4 - 6 or bank 2) in the engine compartment. A return line runs from the fuel pressure regulator to the fuel tank. The Technical Data describes how to check the fuel pressure. The holding pressure should be greater than 29 psi (2 bar) after 1 hour.

New EV-14 ST Injection Valve










The advanced EV 14 ST Extended Tip injection valve from the EV series is used. This new 6-hole injection valve has another injection point located in the intake pipe, which results in an even better mixture preparation and therefore a reduction in emissions.

Tank Ventilation System

The compact tank vent valve (TEV-5) in the engine compartment is designed for a higher throughput, especially in the case of small pressure differences compared with the previously installed valve (TEV-2). The tank vent line is routed directly from the tank vent valve in to the intake pipe.

Carbon Canister

The functionality of the tank vent systems/carbon canister corresponds to that of the 987/997 vehicles. USA vehicles have a carbon canister with tank leakage diagnostic module (DM-TL) which is located in the front luggage compartment.