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Old 06-14-2019, 08:47 AM   #1
jnvolvo
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Default Rebuild tach on 145, anyone have experience?



Anyone rebuilt one of these?

Mine needs a new window but its also horribly imprecise. Wonder if anyone has experience at cracking one open?
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Old 06-15-2019, 09:59 PM   #2
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No idears?
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Old 06-16-2019, 01:48 AM   #3
IansPlatinum
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I'm not the guru here, but I've never seen one of those? I thought the factory add on tach was round... that might be an aftermarket unit
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Old 06-16-2019, 11:02 PM   #4
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I don't believe Volvo ever sold that tachometer.

The Volvo add on tachometer for a pre-1973 140/164 looked like this.

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Old 06-16-2019, 11:19 PM   #5
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Take it back to radio shack.
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Folks on here don't know a good deal when they see it.
how psi stock cna support?

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Old 06-16-2019, 11:20 PM   #6
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Take it back to radio shack.
You're dating yourself, man.
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Old 06-16-2019, 11:36 PM   #7
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As if owning a 145 doesn't?
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Old 06-17-2019, 12:55 AM   #8
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kind of reminds me of a Schwinn speedo?
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Old 06-17-2019, 09:36 AM   #9
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kind of reminds me of a Schwinn speedo?
Would explain the whole 'imprecise' thing
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Old 06-17-2019, 10:01 AM   #10
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would explain the whole 'imprecise' thing
😂😂😂😂😂😂😂😂
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Old 06-17-2019, 10:03 AM   #11
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Take it back to radio shack.
Thought about It, but I need a return form from the internet and I can't seem to get my Commodore 64 to connect properly. 😁😉
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Old 06-17-2019, 10:19 AM   #12
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You'd be better off getting a new, similar style tach from Summit Racing.
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Old 06-17-2019, 12:27 PM   #13
jnvolvo
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You'd be better off getting a new, similar style tach from Summit Racing.
Or no tach at all.
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Old 06-17-2019, 02:04 PM   #14
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Originally Posted by jnvolvo View Post
Or no tach at all.
That's the way they originally were made.

Just out of curiosity, is there a brand name on that tach?
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Old 06-17-2019, 02:14 PM   #15
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Originally Posted by jnvolvo View Post
Or no tach at all.
raw dog it
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Old 06-18-2019, 03:42 PM   #16
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Originally Posted by IansPlatinum View Post
raw dog it
That's how I've been driving mine. I come from the ACVW world, where nothing ever had or gets a tach, though the speedo was marked with shift markers for redline.

I've figured out that 25 in first is loud enough to shift, 45 in second (if accelerating hard), run third for a little bit, then drop to 4th for anything beyond 60 for extended periods of time.

When I first started driving it, I googled the trans ratios to do rough calculations on shift points, and the M40 ratios are pretty funny.

1st 3.13
2nd 1.99
3rd 1.359
4th 1.00

But I digress.
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Old 06-18-2019, 05:12 PM   #17
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Originally Posted by vwbusman66 View Post
That's how I've been driving mine. I come from the ACVW world, where nothing ever had or gets a tach, though the speedo was marked with shift markers for redline.

I've figured out that 25 in first is loud enough to shift, 45 in second (if accelerating hard), run third for a little bit, then drop to 4th for anything beyond 60 for extended periods of time.

When I first started driving it, I googled the trans ratios to do rough calculations on shift points, and the M40 ratios are pretty funny.

1st 3.13
2nd 1.99
3rd 1.359
4th 1.00

But I digress.
That's way more work than I would ever put into it.

I just drive everything by sound and ignore the tach anyway.

I just thought this was kind of a neat add on.
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Old 06-18-2019, 05:13 PM   #18
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raw dog it
That's how you get herpeghonasyphillitis, you know.
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Old 06-19-2019, 08:08 AM   #19
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Looks like a cool old tache I'm thinking j.c. whitney redline gauge works can rebuild it to look like new with modern movements
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Old 06-20-2019, 10:56 AM   #20
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NOS 164, never installed.
$350 shipped USA
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Old 06-20-2019, 11:01 AM   #21
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NOS 164, never installed.
$350 shipped USA
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Old 06-20-2019, 11:52 AM   #22
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That's nowhere near the highest I've seen.

I'm asking $400.00 for a NOS tachometer.

http://hiperformanceautoservice.com/...oducts_id=1541

There's a used 1 on ebay for $400.00.

https://www.ebay.com/itm/Volvo-P1800...QAAOSwzkRdB9bF

And this non-Volvo version of the Smiths tach sold for over $550.00.

https://www.ebay.com/itm/Smiths-Slim...p2047675.l2557

FYI, I recently sold a very nice used 1 of these for $500.00, but I had it professionally rebuilt, restored and updated for use with electronic ignitions.
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Old 06-20-2019, 05:18 PM   #23
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Quote:
Originally Posted by planetman View Post
That's nowhere near the highest I've seen.

I'm asking $400.00 for a NOS tachometer.

http://hiperformanceautoservice.com/...oducts_id=1541

There's a used 1 on ebay for $400.00.

https://www.ebay.com/itm/Volvo-P1800...QAAOSwzkRdB9bF

And this non-Volvo version of the Smiths tach sold for over $550.00.

https://www.ebay.com/itm/Smiths-Slim...p2047675.l2557

FYI, I recently sold a very nice used 1 of these for $500.00, but I had it professionally rebuilt, restored and updated for use with electronic ignitions.
Who do you guys use to work on those tachs? I still have one that I bought years ago. I sent it to Roger and he said he didn't have the right equipment at the time to really test it. I still dream of putting it in my 142 at some point.
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Old 06-21-2019, 10:52 PM   #24
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I use a local speedometer shop.

He's the 1 I used to update the same Smiths dash mounted tachometer.

He can probably repair it and if not, he can update it.
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