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| | | | Joined: Jan 2005 Posts: 135 Shop Shark | | Shop Shark Joined: Jan 2005 Posts: 135 | I got a mechanical tach of ebay. I is an AC, Dated on side is dec 22 1946. It also reads "registers twice cable speed" Does anyone know what truck it is off of, and to what does the cable end hook to? Is it driven off of the distributor? | | | | | Joined: Oct 2003 Posts: 445 Shop Shark | | Shop Shark Joined: Oct 2003 Posts: 445 | I would say driven off the distributor.In 53 on the vett,s the were driven off the generator.so when the belt slipped you got a the bird
dan-pa
| | | | | Joined: Oct 2001 Posts: 3,458 Extreme Gabster | | Extreme Gabster Joined: Oct 2001 Posts: 3,458 | Most mechanical tachometers are driven directly off the camshaft or an adaptor on the distributor. There is an adaptor that fits stovebolt engines which was made by Mallory.
Mechanical tachs work just like speedometers, although speedometers read 60 MPH at 1000 cable RPM. Your tach reads 2000 rpm at 1000 rpm cable, which means it was meant to be hooked to a camshaft or distributor, which rotates at half crank rpm. Most tachometers will work with a standard speedometer cable.
The tach on my bike runs through the cam cover to a gear on the camshaft. Most cars are off the distributor though.
Paint & Body Shop moderator
A lone amateur built the Ark. A large group of professionals built the Titanic. | | | | | Joined: Jan 2005 Posts: 135 Shop Shark | | Shop Shark Joined: Jan 2005 Posts: 135 | Thanks for the info, both you guys, Now all I have to find is an adapter? | | |
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