The MGC fuel delivery system routes fuel from the rear-mounted tank to the twin SU HS6 carburettors at the front of the engine bay via a series of pre-formed copper pipes, flexible Petroflex hose sections at each junction, and an electric fuel pump mounted behind the heelboard on the right-hand side of the car. The routing follows the underbody from the tank outlet, running forward along the right-hand side member to the pump, then from the pump outlet through the engine bay to a T-piece that splits the single feed into two lines, one for each carburettor float chamber. The copper pipes are formed to specific profiles that follow the MGC's underbody contours, and they differ from the MGB's fuel line routing owing to the longer engine bay and the different positions of the pump, carburettors, and tank connections.
Complete Fuel Pipe Kit
A complete copper fuel pipe kit covers all fuel pipes required for the MGC, supplied with fixings. This is the most practical option for a full fuel system restoration, ensuring all pipes are in matching new condition with consistent copper quality throughout. Individual copper pipes are available for each stage of the delivery route: tank pipe, pump pipe, main feed rear and front sections. Petroflex flexible hose sections connect the rigid pipes at each junction, accommodating the relative movement between body-mounted and engine-mounted components.
A T-piece splits the single fuel feed into two for the twin carburettors. Union nipples (six) and nuts (six) provide the connections. Nine Petroflex hose clips secure all flexible connections.
Overflow System
The carburettor float chamber overflow system uses a metal overflow pipe and flexible hose sections to route any excess fuel away from the engine bay. If the float chamber needle valve fails to shut off the fuel supply, due to wear, contamination, or a sinking float, fuel that would otherwise overflow into the inlet manifold and engine bay is instead directed safely downwards through the overflow pipe. Overflow pipe clips differ between home market and North American specifications, reflecting the different routing required for LHD and RHD installations.
Fuel Pipe Fixings and Routing
Pipe clips secure the fuel lines to the boot floor, front side members, radiator mounting brackets, and front inner wing. Secure clipping is important, a loose fuel pipe that vibrates against the bodywork will eventually wear through the copper wall, causing a fuel leak in a potentially dangerous location. When refitting fuel pipes, all clips should be renewed and each pipe checked for clearance from the exhaust system and moving components. An in-line chrome and toughened glass fuel filter should be fitted between the pump outlet and the carburettor feed, protecting the carburettor needle and seat assemblies from particulate contamination carried forward from the tank and pipes.