On Wed, 9 Jul 1997, Joe Boucher wrote: > I've been curious about Propane and CNG for years because of the > reported 110 octane. > > 13:1 compression, here I come! You may be interested in a book by Jeff Hartman called, "High Performance Automotive Fuels and Fluids". He discusses CNG in there... -Jody -- 97 Blue Vortech Z28 http://www.bit-net.com/~jshapiro/z28/