how to set up a 14 volt charging system??

There are components that will reduce the voltage so your cars electrical won't be harmed. Alternatively, run a dual alt setup with your factory alt and a high output alt. Run the power from the high output alt to the back, and run the stock alt for your electrical system.

 
Many of the better 16V batteries (which charge at 18) have a post that uses one less cell internally and gives you 14V to run your factory stuff off of.. That's the simplest way to do it off of only 1 alternator.... you will likely need an external voltage regulator still.

 
14 volt batteries and an alt that can charge 16+ volts. But wouldnt that still be cutting it close for factory components considering you'd be resting above 16volts? Your best bet is probably to run a step down for the factory stuff or a dual alt set up as mention already.

 
14 volt batteries and an alt that can charge 16+ volts. But wouldnt that still be cutting it close for factory components considering you'd be resting above 16volts? Your best bet is probably to run a step down for the factory stuff or a dual alt set up as mention already.
yea i know i have a small *** honda civic so idk how i would even get a second alt in i might just go with some d3100s

 
Many of the better 16V batteries (which charge at 18) have a post that uses one less cell internally and gives you 14V to run your factory stuff off of.. That's the simplest way to do it off of only 1 alternator.... you will likely need an external voltage regulator still.
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