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Engine Specific Info and Questions => IDI Engine => Topic started by: haybayian on September 14, 2007, 04:07:01 am

Title: TD tachometer?
Post by: haybayian on September 14, 2007, 04:07:01 am

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

Thanks.

Haybayian

Title: TD tachometer?
Post by: g-spec on September 14, 2007, 08:21:39 pm

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

Title: TD tachometer?
Post by: Vincent Waldon on September 14, 2007, 08:42:30 pm

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.

Title: TD tachometer?
Post by: haybayian on September 15, 2007, 04:16:33 am

Quote from: "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

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

Title: TD tachometer?
Post by: jimfoo on September 15, 2007, 06:49:11 am

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.

(http://www.66rover.com/rover%20rebuild/052907/slides/PICT0305.JPG)

Title: TD tachometer?
Post by: Hillshy on September 15, 2007, 02:10:17 pm

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,