Dave, What you're looking for is called a "series-parallel switch" a thing common to the heavy truck industry. You could probably use one from a truck(there are possibly smaller versions out there for automotive use) but you will need to mount two six volt batteries in the car. Mike At 01:56 PM 5/27/2003 -0400, David Charles Gedraitis wrote: This has been gone over before, well, at least I think so, but I can't find the specifics I'm looking for in the archives. I seem to recall there was some way to set things up with a relay so a normal six volt wiring system (this is in a '55 chrysler, with a 301 poly) could be made to have 12 volts cranking, thus cranking faster, but ran and charged on the normal 6... Can anyone tell me specifics? Or am I confused? Thanks in advance,
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