Daddylonglegs
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| posted on 12/3/13 at 10:59 AM |
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Speedo Issue
Not 100% sure if this is in the right place, but anyhow....
I really need to sort out my Speedo inaccuracy. It over-reads by way too much and I want to try and sort it before the driving season gets going
proper.
It is a Type 9 5-speed box mechanical drive via a 90deg adapter to the speedo. I know there are different ways of sorting it, but what is the
collective view on the best, and cheapest!, method? I know the uber cheap route is to make a new face for it, but I don't want to do that if I
can help it as it will just end up looking tacky 
Thanks.
JB
It looks like the Midget is winning at the moment......
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Dick Axtell
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| posted on 12/3/13 at 11:59 AM |
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Speedo Probs
Have similar speedo prob, (i.e. reading too high @ 70mph), during IVA Dynaroller test. Gotta get it fixed before re-test, so I will probably use these
guys :-
http://www.speedycables.com/index.html.
Not cheapest solution, maybe, but at least it'll be right. Am also using the 90deg adaptor on my g/box, via custom-made speedo cable.
Work-in-Progress: Changed to Zetec + T9. Still trying!!
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scimjim
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| posted on 12/3/13 at 12:24 PM |
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there are different speedo driven gears available for the type 9 (22 & 23 I think) as well as different driving gears (8 or 9? but changing that
requires disassembly I think?)
some useful info here:http://www.duttonownersclub.co.uk/Members%20subweb/pdf%20files/speedo_calib.pdf
HTH
Jim
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johnemms
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| posted on 12/3/13 at 06:10 PM |
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I've just put in an electric sender - type 9 box
Stepper motor speedo - Dead easy - spot on.. Ford Speed Speedo Sensor Transducer Odometer 95FB 9E731 AA | eBay
Brown Earth - Black Live - Yellow- sensor
[Edited on 12/3/13 by johnemms]
Own chassis & Build - First time pass!!
"7's" aren't really "cars", they are 'experiences"
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steve m
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| posted on 12/3/13 at 06:28 PM |
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I have used Speedy cables a couple of times, very good service, but can take up to 4 weeks door to door
Ive been playing with speedo downloads for iphone, and the current one "speedometer" does exactlty the same as the tomtom
I will be using the phone as well, once the weather picks up
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britishtrident
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| posted on 12/3/13 at 08:03 PM |
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Some but not all radar speed limit warning signs are as accurate as most tintop digital speedos ie they read fast by about 1 to 3% --- with
your tintop look for one that gives a reasonably sensible reading an use this to get an estimate of your % error. Speedy cables can use this
to set up your speedo to get rid of the error.
Alternatively
If you have a Smiths speedo in a tiny font near the bottom of the drive there is a 3 or 4 digit number this is the number of turns per mile of the
speedo. Standard Ford speedos istr are 1000 tpm as are Triumph.
If you work out the tpm of the speedo cable you work using this as a basis.
For example with 185/70 13 tyres, a 3.89 diff and a Blue driven gear in the gearbox you get almost exactly 1000tpm of the cable.
[Edited on 12/3/13 by britishtrident]
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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Daddylonglegs
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| posted on 14/3/13 at 08:35 AM |
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Thanks for the replies chaps 
It looks like the Midget is winning at the moment......
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FatChapChipChop
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| posted on 25/5/13 at 12:16 PM |
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quote:
Originally posted by johnemms
I've just put in an electric sender - type 9 box
Stepper motor speedo - Dead easy - spot on.. Ford Speed Speedo Sensor Transducer Odometer 95FB 9E731 AA | eBay
Brown Earth - Black Live - Yellow- sensor
I've just picked one of these sensors from from a breaker .. £5 .. Will use to drive my ETB electric speedo .. Do you have to give it power, or
are the signal wires enough?
Cheers !!
Drive fast, don't look back!
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britishtrident
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| posted on 25/5/13 at 02:45 PM |
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Hall effect sensors need power and earth.
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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FatChapChipChop
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 posted on 25/5/13 at 04:40 PM |
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quote:
Originally posted by britishtrident
Hall effect sensors need power and earth.
And it works .. .. Simples !!
Drive fast, don't look back!
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