This Hefley X2 has all the features as the X1 but it also will adjust to a wide variety of fuels. It has adjustable compression ratio built in.
It can run on regular or high test gas, E85 ethanol, diesel, bio-diesel and other fuels still under development.
The Hefley Workshop is provided for the media and others who want to know exact details. Just provide your Email address and password for full immediate access to drawings and complete explanation.
