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Old 1 Week Ago   #1
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ClassicFiat500 has donated!
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fitting rev counter

Hi hope someone can help I am trying to find a Tachometer for my 500L fitted with a 652 126 engine all the ones i come across seem to be for 4 cylinders engines.
Can i use a Tachometer for a motorbike? if so is it easy to wire it up or would it need a mechanical drive? I have 123 ignition.
Barry
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Old 1 Week Ago   #2
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Re: fitting rev counter

I have n"Abarth style" instrument cluster in my car, and in it is a tacho for a 2-cyl engine that is NOT a bike instrument. It is a "SMITHS CLASSIC SEMI-PROGRAMMABLE" and can be purchased from:--"Cearbont Automotive Instruments Ltd" (www.caigauge.com). It does 2+4+6+8 cylinder engines and is altered to the number of cylinders it is required for by a number of small switches in the base of the tacho.
.
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Old 1 Week Ago   #3
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Re: fitting rev counter

I installed a digital dash with requires a 4 cyclinder tach signal (which is taken from the negatve of the coil output)

I used this to great effect

https://www.ebay.co.uk/itm/UNIVERSAL-TACH-ADAPTER-CONVERTER-COP-1-2-3-4-5-6-8-10-cyl-to-any-4-6-8-Tach/141979625888?hash=item210ea529a0:g:mEsAAOSwJzRfB6R 4

No afillation

So yes, you could use your favourite 4 cyc tach if you so wanted to.

I would advise that you don't use a motorcycle tach, as their range is quite high, 0 - 14000RPM, so the granularity is small and you'll not see much movement on the dial.


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Old 1 Week Ago   #4
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Re: fitting rev counter

Soooooooo, what exactly does an "Abarth style" instrument cluster look like?
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Old 1 Week Ago   #5
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Re: fitting rev counter

Ronstox; I have never had any success at putting pictures on to the Forum--if you contact me directly-- tommontagu@yaho.co.uk I will send you some pictures of my instrument cluster. On the 'L'model with the big instrument cluster, they are a real P.I.T.A. to fit--you have to cut quite a bit of the dash away, and where you do have to cut makes it impossiblt to refit the original instrument cluster-- the 'D', 'F' and 'R' models with the small instrument cluster make it much easier to fit an "Abarth" style cluster. My cluster has a tacho, electronic speedo, oil temp gauge and oil pressure gauge along with various warning lights. 'Mechanical' speedos are available, it is just that my kit came with an electronic speedo in it.
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Old 1 Week Ago   #6
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Re: fitting rev counter

Picture from a friend of mine and his during build.


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Old 1 Week Ago   #7
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Re: fitting rev counter

Oh, that looks nice. Thanks hobbler & lazylobster. I have a 500F and I really like the original instrument cluster, but I would also like more information about the engine in real time. I'll probably go with something like evmaniac's or lazylobster's solution
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Old 1 Week Ago   #8
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Re: fitting rev counter

HI Ronstox, for my LCD display, all in parts around 110. Mostly electical wiring.t-piece for the oil pressure sensor to keep orginal working on the round speedo. Had to tap the oil pan for the oil temp sensor. What I like about it is, that you can unplug it and remove the suction mount and revert back to original look in approx 1 min.


DM me your email if you wish I'll forward over a listing of the parts.

Cheers
Rob
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Old 1 Week Ago   #9
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Re: fitting rev counter

Both "FD Ricambi" and "Passione" sell a take off that allows for both a pressure and a warning light sensor to be fitted to the same take-off---eliminates the need to drill intothe sump if all you want is a pressure read-out (and the 'low-pressure' idiot light). If you wanted temperature and pressure, sensors are probably available to allow for this, but possibly at the loss of the 'low-pressure' light.
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Old 1 Week Ago   #10
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Re: fitting rev counter

Quote Originally Posted by the hobbler View Post
Both "FD Ricambi" and "Passione" sell a take off that allows for both a pressure and a warning light sensor to be fitted to the same take-off---eliminates the need to drill intothe sump if all you want is a pressure read-out (and the 'low-pressure' idiot light). If you wanted temperature and pressure, sensors are probably available to allow for this, but possibly at the loss of the 'low-pressure' light.
I have got a tee piece that does just that, provision for the standard switch and a sensor. Going spare if I can find it 😀
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Old 1 Week Ago   #11
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Re: fitting rev counter

There are few combined oil pressure/temperature sensors out there, but the cheapest I've seen is ~$100. With one of those you could make due with only a tee (and not drilling out the pan). You'd get circulating temp instead of bottom of pan temp. A little more accurate depending on how exacting you are.
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Old 1 Week Ago   #12
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Re: fitting rev counter

I have a matching set of Veglia gauges available for sale - left over from my build if anyone is interestedClick image for larger version

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Old 1 Week Ago   #13
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Re: fitting rev counter

It looks like your speed is 'mechanical'---am I correct?
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Old 6 Days Ago   #14
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Re: fitting rev counter

My spare matching set is indeed a mechanical speedometer- direct swap for the existing unit
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Old 6 Days Ago   #15
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Re: fitting rev counter

What size is the speedo Andrew? Would you sell it individually, or only as part of a set?
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