Last I knew they had several working prototypes running and being evaluated. They never publish BSFC numbers which is the true test of efficiency. I did speak with one of thier engineers at the SAE conference last year in Washington D.C. 296g/Kwh works out to about 28% efficiency. The Scuderi group is very good at raising money and getting patents on what I consider duplication of prior art. I think there is signs of investor remorse as I know a person who got thier money "cheerfully" refunded rather than litigating in court.
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