[Frank Lee]

Originally Posted by Hal

I plan on using a 250 engine as well, but have been toying with the idea of a small diesel in parallel with a DC motor. It would run all electric to 25-30 mph, then engage a clutch to couple the diesel to the drivetrain and use the electric as torque assist for acceleration once cruising speed is reached. As an alternative, I have thought about leaving the motor and the diesel solidly connected, arrange a valve to vent the combustion chamber (so the engine doesn't drag on the motor) which would close at the 25-30 mph threshhold.

What?