I need some help with an old Dodge truck.

[Tooljunkie]

My 52 cockshutt 40 has been on 12 volts for 15 years, starter cranks faster. Wont hurt it at all as it has heavier windings to take the high amperage required with 6 volts. My 51 fargo is a different story, i put a new 6 volt starter into it and ran it on 12 volts until i did the v8 swap.

 

[67Dart273]

My 52 cockshutt 40 has been on 12 volts for 15 years, starter cranks faster. Wont hurt it at all as it has heavier windings to take the high amperage required with 6 volts. My 51 fargo is a different story, i put a new 6 volt starter into it and ran it on 12 volts until i did the v8 swap.

The other thing about DC motors is that they generate what is called back emf, which simply, reduces current draw, so a 6V motor on 12V doesn't draw necessarily 2X the current The big "problem" (some allege) about high starter voltage is that some will "eat" starter drives a bit faster if they are the "Bendix" type AKA get "thrown in" by rotational force, like early Fords

 

[Tooljunkie]

The other thing about DC motors is that they generate what is called back emf, which simply, reduces current draw, so a 6V motor on 12V doesn't draw necessarily 2X the current The big "problem" (some allege) about high starter voltage is that some will "eat" starter drives a bit faster if they are the "Bendix" type AKA get "thrown in" by rotational force, like early Fords

Yup, i can agree with that. They snap in a lot harder than 6v.

 

[sireland67]

Yep, 6volt starters love 12 volts..... just for not very long.
When my dad brought home his (now mine) 33 Imperial, it had an eight volt battery. Wish I could get another one......

You can still buy 8v batteries at napa.