Do CDI boxes require a coil? Options

[Aaron Cox]

buying a mallory unilite distributor, and hyfire CDI box. does this require a new coil? no coil? blue coil?

also- my webers have vaccuum ports on them. should i go with vac advance or not on the mllory

[SLITS]

The mallory is only a trigger device to send pulses to the CDI box. The CDI is a large capacitor(s) to feed the coil. Instead of feeding 9-12V to build the charge in the coil before collapse and using a condensor(small capacitor) to provide a short high voltage shot to the coil to slow collapse, the CDI sends a short high voltage shot and generates greater spark energy out of the coil.

Now this is all bullshit - what it in effect allows you to do is widen the spark plug gap to increase the spark area available to ignite the gas/air mixture better = bigger flame, faster start.

Answers are:

1.) Not necessarily - a blue coil is nice, a nasty coil is only as good as the remaining parts.
2. For fuel economy, yes use the vac advance unit.

Slits - Not an engineer - just old