Marks 4WD Adaptors manufacture this surge tank kit for V6 and V8 EFI engines to enable them to be fitted into any vehicle.

Vehicles previously fitted with carbie engines are commonly being re-powered with Commodore, Chevy, and Oldsmobile EFI V6 and V8 petrol engines.  Chevy diesel engines are also commonly fitted and are also effected by the following. When the vehicle was fitted with a carburettor no problems were experienced as the carbie bowl acted as a reservoir and prevented fuel starvation. Unfortunately EFI engines rely on constant fuel pressure for the injectors to operate properly. In a lot of cases the fuel tanks are not equipped with baffles that prevent fuel starvation when accelerating, cornering quickly or climbing steep hills, the fuel supply line in some cases is also to small for the high volume high pressure pump, this causes cavitations in the pump.

To over come this problem Marks 4WD Adaptors manufacture a surge tank that is used in conjunction with a low pressure lift pump. The lift pump is mounted on the side of the surge tank, it transfers fuel into the surge tank which holds approximately 1ltr of fuel. When it's full, an over flow pipe caries the excess fuel back to the fuel tank.

A 12mm outlet is fitted in the top of the tank allowing unrestricted fuel supply to the high pressure fuel pump, the 12mm outlet is fitted with a pickup tube which is suspended approximately 25mm from the bottom of the surge tank. This allows heavy material and water to be separated from the fuel, a drain plug is fitted for ease of servicing. The return fuel from the engine is plumbed into the top of the surge tank through a separate fitting.

The tank is supplied with all fittings, lift pump, mounting bracket, hardware and instructions.

This photo shows a surge tank fitted to a Hilux chassis rail. Note the low pressure lift pump bolted to the bracket on the side of the surge tank.