The Social Night held on the 18th of February proved to be a very entertaining evening with around 60 people coming along to hear what DJR Team Penske engineer had to say about the use of lead free fuels and listen to his anecdotes about motor sport.Ludo started with the background as to why lead had been used in the past and that public health implications had forced change. Lead in fuel was used as an octane booser as well as providing a lubricating effect on valve seats which were often just cut into the soft cast iron head material. Modern engine design has embraced the use of unleaded fuel and most heads are of aluminium alloy construction where wear resistant valve seat inserts are fitted so lubrication was not a requirement.By his own admission, his experience with “old timer” engines as he called them was limited. Basically, his advice was to use a mix of up to 15% ethanol. Some engines may also need the use of additives to protect the valve arrangement.He also spoke about the poor quality of Fuel available at the bowser. The elimination of refineries around Australia has meant that with age and tranport of fuels around the country, the octane levels in pump fuel varies considerably.Ludo answered many questions about his career and experience in motor racing. His knowledge and experience on how to set up and run cars at a high level was very enlightening.Ludo prepared a handout for those who attended and it is available for download here.
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