>like to know as well, is the maximum pressure that can be developed when >ether is used by any method as a fuel. PSI is a term we are more familiar >with. Here is a number for gasoline. http://www.hastingsinc.com/Service%20Tips/cylinder_peak_firing_pressures.htm Hope this helps, Spencer Yost Owner, ATIS Plow the Net! http://www.atis.net