Group ND Proposal
The Fuel delivery system type must remain as per the manufactures specifications in the Vehicle Specifications eg:
- Carburetted
- Mechanical Fuel Injection
- Electronic Fuel injection
Note: For both mechanical and electronic fuel injected cars there can be no more than 1 fuel injector per cylinder or rotor.
Throttle Plates
On a carburetted car the original carburettor may be swapped for a different carburettor or replaced with multiple carburettors. The inlet manifold is free.
On fuel injected cars the number of throttle bodies is free as is the inlet manifold.
The total number of throttle plates can be no more than the number of engine cylinders or rotors.
Fuel Regulation
Fuel pumps and fuel pressure regulation is all free.
On Carburetted cars, elements that control the fuel regulation such as jets, vacuum units, springs and electro-mechanical mechanisms are all free.
On Mechanical Fuel injected cars, elements that control the fuel regulation such as metering units, distributing units, vacuum units, springs, air flow devices and other mechanical mechanisms are all free. The size of the fuel Injectors is free.
On Electronic Fuel injection cars, elements that control the fuel regulation such as the ECU, sensors and pickups used to provide the ECU with engine data are all free. The number of sensors and pickups used is also free. The size of the fuel Injectors is free.
Justification and Rationale
As other historic classes have permitted quite radical changes to carburetted vehicles. The same freedoms have been translated into both Mechanical Fuel Injection and Electronic Fuel Injection systems that are used on a lot of Group ND era cars.
