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12 volt tachometer on a 6 volt car?
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autobus73 Premium Member
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PostPosted: Tue Sep 02, 2008 5:43 pm    Post subject: 12 volt tachometer on a 6 volt car? Reply with quote

Digging around in my shop and i came upon a 12 volt tach and was wondering if it could be installed on my 63 6 volt beetle ?

and if so how will it read ?..... will it show correct rpms when set to 4 cylinders?


Any help on this would be very helpfull thanks Brett
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shano63 Premium Member
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PostPosted: Tue Sep 02, 2008 5:55 pm    Post subject: Reply with quote

I don't think any 12 volt electrical device will work with a 6 volt system outright. You could get an inverter to boost the voltage. I just got a 6 volt tach through these guys.. http://www.tachshack.com. Nothing fancy but it works. Check my gallery for a pic. Chris
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PostPosted: Tue Sep 02, 2008 6:00 pm    Post subject: Reply with quote

thanks for the help i actually hooked the 12 volt tack up and it and the light works but the rpm readings seem low and that is what i am wondering now if it wont last (the tack will burn out) and wont read correct?
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PostPosted: Tue Sep 02, 2008 6:06 pm    Post subject: Reply with quote

I have only used a 12v tachometer on a 6v car with an old radio shack inverter.

I don't think running 6v to it will hurt it, it just won't work right.
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PostPosted: Wed Sep 03, 2008 9:48 am    Post subject: 6V to 12V Converter Reply with quote

This 6V to 12V Converter will work great for a 12 volt gauge or tach in a 6 volt car.

http://www.thesamba.com/vw/classifieds/detail.php?id=599103
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This will work also.
http://www.thesamba.com/vw/classifieds/detail.php?id=548683
Image may have been reduced in size. Click image to view fullscreen.
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PostPosted: Wed Sep 03, 2008 10:23 am    Post subject: Reply with quote

Great idea i just had a look at clip 1 and they sell a 6v to 12 v drop for around 10 buck again thanks for the idea
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PostPosted: Wed Sep 03, 2008 1:03 pm    Post subject: Reply with quote

blamb wrote:
Great idea i just had a look at clip 1 and they sell a 6v to 12 v drop for around 10 buck again thanks for the idea


That won't work, it's a voltage dropping resistor, as are all resistors.
It will only drop or reduce the voltage (less voltage, NOT MORE voltage).
You want to increase the voltage form 6 volts to 12 volts.


ACC-C10-5754 - VOLTAGE DROP 12V TO 6V CONVERTER
http://www2.cip1.com/SearchResults.asp?Search=voltage+drop
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