You are probably thinking of the GP460, killer engine I believe Daves has em I musta missed too!
Thanks for the links. The Zenoah engines are about as good as it gets. We fly em in our R/C stuff, the old G-62 is a well proven power house, I have a G-23 in a gasser helicopter. Reliability is the issue with a heli and its never missed a beat. The 46 is unkown to our R/C crowd, but it its a Zenoah, it has to be great!