General Principles

  • Colin Campbell


A petrol engine can start readily, run smoothly and give every appearance of being in good order, without necessarily being in good tune. The early motorist was happy enough if his engine started at all and kept running for the duration of his short journey. The modern motorist is more discerning and insists that his engine be maintained in an efficient state of tune, giving full power and a good fuel consumption. His day-to-day experience of his car’s performance soon tells him when a tune-up is required. He remembers when a certain hill could be climbed in top gear. Since a drop to third gear is now necessary he is aware that his engine has lost its tune.


Compression Ratio Petrol Engine Ignition Timing Horse Power Driving Wheel 
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Copyright information

© Colin Campbell 1963

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  • Colin Campbell

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