[T3] Porsche 914 tach on a 73 SB

[Jim Adney]

On 22 Oct 2016 at 17:18, 73 squareback Cincy wrote:

> I came across a 914 tach, and would like to install it in my
> Squareback since i always wanted a tech in it. Its been 25 years since
> i had a tach in a VW so im asking, what is the best way to install
> this dude for it to detect the RPM's? and is there any kits out there
> where i can mount it under my dash or something? 

You would need to start by finding out how it was wiyred in a 914, 
then duplicating that in your Type 3. Our ignition systems are the 
same, so you would only need to duplicate the 914 wiring.

You will need at least 1 extra wire running back to the engine. If 
your '73 is an MT, there will be one extra red wire that runs from 
(near) the fuel pump relay to near the oil cooler in back. All '70-3 
Type 3s got this wire, but only the AT cars used it. The engine end 
will be cut off. The dash end will be hanging freely or may be 
connected to the fuel pump relay.

If it's too large to replace the clock, check your FLAPs for a 
mounting bracket, or make your own.

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Jim Adney, jadney at vwtype3.org
Madison, Wisconsin, USA
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