Author Topic: Tacho  (Read 1227 times)

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Offline dpen

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Tacho
« on: March 08, 2008, 04:24:32 PM »
This should go in the "parts" but I'd like to try it here for a day or so then I'll wipe it.

I'm after an aftermarket tacho for my K7/K8 (june'78 build) rat

I'm not interested in originality but can't find anything in Oz to run off the twin coil system
« Last Edit: March 08, 2008, 04:39:15 PM by dpen »

Offline 750goes

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Re: Tacho
« Reply #1 on: March 08, 2008, 05:58:02 PM »
So you want an electronic tacho, not the cable driven one.

I suppose you could get one if possible for a 4 cylinder car ??, would that work ??

Offline joeb

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Re: Tacho
« Reply #2 on: March 08, 2008, 06:34:31 PM »
Get ahold of scondon I think his tach is eletronic.

Offline dpen

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Re: Tacho
« Reply #3 on: March 08, 2008, 10:31:17 PM »
Electronic is what I'm after but car ones are no good as they're made for a single coil system.

I've contacted quite a few instruments places & they've all said "no chance"

troppo

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Re: Tacho
« Reply #4 on: March 08, 2008, 10:33:43 PM »
i wouldnt know what would be involved, but what about modifying a later model tach from a bike, one of the naked style bikes would probably provide one that looks right

Offline dpen

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Re: Tacho
« Reply #5 on: March 08, 2008, 10:37:04 PM »
I thought of that but wanted to see if one was buyable first so I don't have a lot of mucking around to do.

I rebuilt my present one but the rotor on later Ks is different & the tacho becomes inaccurate as the revs increase

Offline tinyrobot

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Re: Tacho
« Reply #6 on: March 08, 2008, 10:41:38 PM »
I'm in the same boat.  I'll let you what I find.

http://forums.sohc4.net/index.php?topic=31595.0

Offline dpen

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Re: Tacho
« Reply #7 on: March 08, 2008, 11:02:35 PM »
just read your post Robot - looks like there's a market for one of these things

kta

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Re: Tacho
« Reply #8 on: March 09, 2008, 03:26:30 AM »
Couldn't you just splice the wires for the spark sensor into more than 1 coil? I don't see how this would cause any significant issues.

troppo

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Re: Tacho
« Reply #9 on: March 09, 2008, 03:51:20 AM »
Couldn't you just splice the wires for the spark sensor into more than 1 coil? I don't see how this would cause any significant issues.

but if you did that you would have to cut the tach open and remark the face for a reading that is out by 75%

Offline dpen

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Re: Tacho
« Reply #10 on: March 14, 2008, 02:37:55 AM »
Aren't there some great people around.

Found a web page here in Oz advertising tachos.

I wrote the bloke asking his advice on the models advertised, where to get them etc.

I received an answer "we are wholesale, we don't sell direct", that was it

Bloody turkey, even if I knew where they are sold he can get stuffed.

Offline bryanj

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Re: Tacho
« Reply #11 on: March 14, 2008, 03:25:28 AM »
Can you not just run off one coil and re-calibrate?
Semi Geriatric ex-Honda mechanic and MOT tester (UK version of annual inspection). Garage full of "projects" mostly 500/4 from pre 73 (no road tax in UK).

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Offline 750essess

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Re: Tacho
« Reply #12 on: March 14, 2008, 05:15:03 AM »
Motogadget makes a tach/ speedo that works
http://www.motogadget.com/en/webshop_en/index_webshop.htm
Or you could run a dyna2000, it has a tach output wire that works with the auto tachs
there are some other brands, but I dont remember what they are.
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