TD tachometer?

[haybayian]

Could someone offer tips on how to go about a tachometer and where to buy the hardware,preferably in Canada.

Thanks.

Haybayian

[g-spec]

Are you looking for a tach for a mkIII or a mkII....if your looking for mkIII I have a guage cluster with a rpm guage.

p.s. Im located in london ontario

[Vincent Waldon]

Or if you're looking for one in its own pod VDO sell a version that are diesel-compatable...

http://usa.siemensvdo.com/products_solutions/cars/performance-instruments/vdo-performance-instruments/instrument-series/cockpit/tachometers/tachometers+-cockpit.htm



Either way you'll want to ensure your alternator has a terminal labeled "W"... this is where a diesel tach connects.

[haybayian]

Are you looking for a tach for a mkIII or a mkII....if your looking for mkIII I have a guage cluster with a rpm guage.

p.s. Im located in london ontario

Thanks,

I am not clear precisely what I am looking for. I am putting together a VW (AAZ) powered kitcar from a long block and I belive that my best option is a magnetic sensor. I may have to buy the VW "W" alternator as sugggested here.

Haybayian

[jimfoo]

You can also just take an alternator apart and hook a wire to it on any phase just before it goes to the diodes. On a Delco alt, it is a stud with a bolt, so is very easy to do, but I'm not sure about a Bosch.

[Hillshy]

in a bosch its a spade marked "W"

the parts involved are just cheap electronic components + the actual gauge itself, unless you have one in mind?

do a search as there's lots of info here an the subject of tac's, there is also a circuit that can be built and a method to calibrate.

the bones of it:
build the circuit from the diagrams on this site, its powered by 12v source then 2 wires go into the tac and its calibrated. i had to do this and it works a treat!

have you actually got a tac on mind that you would like to use,