Watch this Porsche miniature engine 1:3 running and revving. It is built by Mr Hofman, who is a Dutch Porsche driver with precision instrument maker 40 years ago. It is a miniature of the Porsche 911. It is not a static model for display instead it is working and revving so loud.
The engine running normal petrol engine with mechanical fuel pump to feed the carburetors. It took more than 10 years to with 6,000 hours to finish it. The engine produce 8 horsepower and details development in the following article but it is not in English.