Originally Posted by
fcello
Curious where to read about the natural gas conversion issues? e.g. does it have the anti-knock advantage as well, & is the energy conversion similar to lp? What accounts for the cost & complexity - is it simply the higher pressures in the storage tanks and their cost?
Yes, Methane (CH4) is 130 Octane (research and motor). Energy density is even lower, 25% of gasoline by volume, due to it being a compressed gas, not a liquid. You are right, the cost and complexity is due to extremely high pressures, up to 3600psi. Also, for a given range, the tanks have to be much bigger.