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Fuel usage
It is important to know how much fuel the car is using so that the car can be sent out with just enough fuel to last
the session, over fuelling a car will reduce the performance greatly. This section outlines how to measure the cars
fuel usage.
Defueling
Attach the fuel drain hose to the dry brake connector on the fuel line, as shown in figure 9.1. With the drain hose
connected, the fuel pump out kit needs to be attached. To attach the pump out kit, first connect the sure seal
connector to the corresponding plug on the car, labelled “P.Out”, shown by the arrow on figure 9.2. The Pump out
kit can then be connected to a 12V battery source. Finally, with the open end of the drain hose in a suitable
container, the pump out kit can be turned on via the latch switch.
Once the flow of fuel from the drain hose, becomes intermittent the de fuelling process should be stopped. This
prevents the fuel pump from becoming damaged due to running dry.
With the fuel drained a manual measurement of the fuel can be made, comparing this measurement with the
amount of fuel put into the car will show how much fuel has been used.
The C125 dash offers an alternative method of measuring the amount of fuel used by the car. The dash automatically
counts the fuel used, and displays it to the driver. To accurately measure the fuel used in a session it is important to
reset the dash before starting, this zero’s the parameters that the dash displays. There are two types of reset’s that
can be performed, a session reset, and a fast lap reset. To zero the dash, the “reset” button on the steering wheel
needs to be pushed and held for either 3 seconds (session reset) or 5 seconds (fast lap reset). A session reset will
zero all the parameters bar the fastest lap time. A fast lap reset will zero every parameter.
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