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Nicasil was developed by Mahle in Germany at the request of Mercedes Benz for the experimental Wankel engine MB were using as a prototype at the time.
When the company decided rotary engines were not the way to go they allowed other companies to access the patent.
Subsequently it was used by Porsche on their air cooled competition engines including the 917 Turbo installation to help with the 1000+ horsepower output.
When the patent expired a large number of companies bought the technology to use in virtually all two stroke engines from chainsaws to world champion motorcycles.
So far as I know GM never used it.
Peter.
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