Motorized Turbo

A turbo is more efficient than a superchager, and it even quiets the exhaust. But how to cure the turbo lag?

There are electric super chargers (real ones) http://www.boosthead.com/home.php , that require extra batteries to provide the horspower. Their PSI to RPM curve is almost the opposite of a turbo (and it draws 1250 amps!).

So, why not use motor to spool the turbo, along with the exhaust. You will need a motor big enough for 5 pounds of boost to where the turbo normal kicks in (~300 amps).

It will be lighter, and safer, than compressed air or nitrous.

A simple computer could determine when to activate the motor to reduce spool up time, or to use it full time to augment the exhaust when serious accelleration is required (desired).

The major negatives are the drag of the field magnets when the motor is off (use just enough power to keep the motor "neutral"), the motor must either operate at 100,000 rpm or use gears, and the motor is going to get a lot of use, so brushless (transistor commutation) is a must.

A sideways positive is the extra rotating mass will keep the turbo spooled up during shifts (with the blow off valve bleating until the throttle plate opens)

This will become easier when cars move to a 42V bus (smaller wire for 86 amps).

Does anyone know of a method of freewheeling the turbo when the motor is running slower or stopped?

What am I missing?

Enjoy, Steve