RE: [Chrysler300] 12 volt coversion

["Jack Boyle" <jackcboyle@xxxxxxxxx>]

I bought my C300 in 1967 and converted it to 12v in 1968 as a necessity
given the battery technology and cold weather in Nebraska. I stripped a 56
NY of most electrical components for $50. Negative ground can also be a head
scratcher when attempting to keep some 6v components.

 

It is very simple to do on the surface but the deeper you go, the more
complex it gets. I am currently at a crossroads with my car - stay with 12v
or go back to 6v as part of my planned restoration. I want to add A/C so
that may make the decision for me.

 

I drive my car a lot and I have still not converted everything all these
years later. 

 

See my comments below

 

?Jack

 

From: Chrysler300@xxxxxxxxxxxxxxx [mailto:Chrysler300@xxxxxxxxxxxxxxx] On
Behalf Of Johan Västsäter
Sent: Monday, June 03, 2013 9:48 AM
To: chrysler300@xxxxxxxxxxxxxxx
Subject: [Chrysler300] 12 volt coversion

 

  

Hi folks,

Due to problems with my original Hemi 331 engine in my C300 I will pull the
engine to have it rebuilt during the coming winter.

Water disappearing in to the oil system gives two possible errors. Either it
is a rust hole in one of the cylinders or a frost crack.

I must say I hope for the first?

As I have a rebuilt 354 over bored to a ?392? in my shop I will put it in my
C300 shortly.
Just for the fun of driving the car this summer.

As the 354 is sort of high compressive now I doubt the 6 Volt system will be
able to cope with the starts

and I am looking into my earlier retired thought of converting the electric
system to 12V.

I know converting a C300 to 12V will not keep it original but that is a
deviation I can live with.

As it is a C300 with very few options on it ought to be rather easy
compared to other cars.

All of this assumes your heavier ga. wiring is sound so 12v (twice the
voltage, approx ½ the amperage) should not be a problem.


No power seats. No power windows. I kept the 6v seat, it works, just faster

The things that I come to think of are the following:

Lamps and bulbs. Outside and inside. Change all, takes a while and skinned
knuckles

Generator. Replace w/ 56

Starter. I have heard I can use the 6V starter for pretty long time, right?
I tried to keep, I now recommend change with a 56, takes 1 hour

Coil. change

Relays. (Charging, starting and lights)  I changed all of mine and flasher.
No switch changes are needed (lights, horn, turn signal, etc)

Wiper motor.  I have not changed (yet) and I regret it. I have thrown my
blades off more than once and can only use low speed.

Interior fans 2pcs. I changed the heater fan later

Horns. I kept my 6v and they sound like a freight train J

Amp meter. Do I need to change that? I changed the entire cluster, simpler
way to go

Tank meter. Do I need to change that? Yes, or it will read wrong like mine
does

Have I missed many things? Radio. I ran mine using a resistor for years. It
finally conked out and I put a 56 in the car. I DO NOT recommend resistors,
the smell and are a fire hazard. I had false alarms with the smell of ?hot
wiring? and it drove me nuts.

I have heard to some kind of ?reducer devices? that can be placed before a
consumer that makes it possible

to keep the 6V device.

Can anyone guide me on that?

Is it expensive?

Can I use it on i.e. wiper motor, horns or fans? 

Looking forward to your help.

300?ly

Johan Västsäter

Sweden

C300

?56 NY

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