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Re: [T3] Fwd: 6V to 12 V conversion question

In a message dated 1/10/05 10:43:40 PM Eastern Standard Time, 
porschedave@rennlist.net writes:

<< >We want to convert the 6 V Notch to 12 and I just learned that there 
 >are 12 V cranks and 6 V cranks. The difference appears to be the 
 >flywheel end of the crank. If I go for a 12 V crank then I have to 
 >have a 12 V flywheel which is the same as on a type 1. This also 
 >necessitates a type 1 clutch and pressure plate and some clearance 
 >issues around the bel housing. I guess I would have to do some mods 
 >to fit a 12 V starter. But I have 2 6 V pressure plates and 2 
 >useable clutches. I also have a working 6 V starter which I gather 
 >would also be happy with 12 V. So my question is whether I need to 
 >change this crank for a 12 V cranks. >>

You really don't need to swap the flywheel and crankshaft to run 12 volts. 
John's 66 Square is running 6 volt parts with 12 volt electrics. The key will be 
not running the starter for long periods at a time, otherwise you'll burn up 
the starter. Using 12 volts on a 6 volt starter causes the starter to turn 
faster. My old 66 was set up this way too, and it worked fine for the 1.5 years I 
had it. I'm sure others here have done it too. : ) Or you can convert the 
crank and flywheel over, and grind the belhousing out, swap the starter bushing 
(or use the self supporting AT starter) and go that route if you want. It's 
more work this way, but you might have an easier time finding parts later. If you 
swap the aluminum cooling fan shroud to a later style, then you can use a 
standard type 3, 12 volt generator, or even do an alternator conversion if you 
like. My 65 Notch is running the later stuff (off a 70), and I even went to a 
full on IRS conversion on mine. This way I get the best of both worlds, early 
style, and late ride characteristics, with 12 volts. : ) I hope this helps.

Bob 65 Notch S w/ Sunroof
       71 Square, now a 2 seat Roadster, pics can be seen at; 

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