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Tachometer Installation: Mechanical vs. Electrical 120-130

posted by  jwcurry on  Thu Oct 7 08:59 CST 2004
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Well.....

I just picked up a very cool old NOS Smiths (Made in Englad)
tach. What's particularly neat about this tach is that the
needle moves from right-to-left.

It is, however, a mechanical tachometer. Are they any sugestions
about making a mechanical tach work in a 122 versus an electrical
tach?

Best,
JErry Curry
Salem, OR








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    Tachometer Installation: Mechanical vs. Electrical 120-130

    uid 779's pic
    posted by  matt b on  Thu Oct 7 09:38 CST 2004
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    last visit: Tue Oct 14 16:33 CST 2014
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    How big is it? Not many backwards tacks out there... the only one I know of would be like the one in my '53 Jag...

    Its cable driven, and runs via cable off the exhaust cam on the DOHC engine. I expect you'd be real hard pressed to get it to work on a Volvo... you'd have to drive it off something that spins 1/2 engine speed (cam speed or distributor), and anti-clockwise.

    Some of the later ('60s) Jags have a tach generator... such that the tach itself is actually a voltmeter or amp meter, but that doesn't sound like what you've got...

    Got any pictures? I reckon you should just give it to someone that can use it like myself :-)

    -Matt
    --
    -Matt '70 145s, '65 1800s, '66 122s wagon, others inc. '53 XK120 FHC








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      Tachometer Installation: Mechanical vs. Electrical 120-130

      uid 4846's pic
      posted by  JohnMc on  Thu Oct 7 14:35 CST 2004
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      last visit: Thu Oct 23 07:42 CST 2014
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      Yeah, I thought the little speedo-stype driven tach in my Dad's Xk120 ('51 FHC) was pretty neat. That and the oil-level read-out built into the gas gauge, and the tranny dipstick. I've got to get that from him sooner or later and rebuild it.
      --
      I'm JohnMc, and I approved this message.








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        Tachometer Installation: Mechanical vs. Electrical 120-130

        uid 779's pic
        posted by  matt b on  Thu Oct 7 17:21 CST 2004
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        last visit: Tue Oct 14 16:33 CST 2014
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        Yes... You do need to get that car. But don't count on that oil/fuel level gauge thing to be working. I have yet to see one that does. Them tachs are a no-brainer though. THey all seem to work perfectly. So does the dipstick for the 4 speed manual, but you get gear oil on the carpet if you ain't careful.

        -(53 FHC)
        --
        -Matt '70 145s, '65 1800s, '66 122s wagon, others inc. '53 XK120 FHC







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