I have a restored 1947 Plymouth Business Coupe. That was the same year I, too, came off the “assembly line.” The Plymouth has a 6-volt battery, and the starter motor turns over slowly. Can I safely ...

A DC-DC converter allows elevation of an input dc voltage making it twice on its output. This is a useful innovation for devices that use DC power supply that is made twice as its input dc voltage.

All of the above, Jerry. The problem is that everything in your car is designed to run on 6 volts. Running 8 volts through 6-volt components will put some stress on them and might shorten their lives ...

DEAR CAR TALK: I have a restored 1947 Plymouth Business Coupe. That was the same year I, too, came off the "assembly line." The Plymouth has a 6-volt battery, and the starter motor turns over slowly.