Speedometer correction box

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Discussion

Getsis

Original Poster:

1,540 posts

229 months

Thursday 3rd March 2016
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I have 2 of these speedometer correction boxes, not sure if anyone uses these anymore. They come with a set of gears and a chart so you can correct your speedometers without stripping and calibrating your original. Used when you change gearboxes or differentials etc. Are they worth anything to anyone?.



Huntsman

8,600 posts

263 months

Thursday 3rd March 2016
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Getsis said:
I have 2 of these speedometer correction boxes, not sure if anyone uses these anymore. They come with a set of gears and a chart so you can correct your speedometers without stripping and calibrating your original. Used when you change gearboxes or differentials etc. Are they worth anything to anyone?.


I could have used one a few years ago. What a fab little kit!

Riley Blue

22,133 posts

239 months

Thursday 3rd March 2016
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For years I've put off having my Riley's speedo recalibrated due to none standard wheels and tyres. It's so far 'out' that I use a speedo app on my mobile phone instead. This gizmo would completely solve the problem! If you're wanting to sell, please PM me with a price.

Getsis

Original Poster:

1,540 posts

229 months

Thursday 3rd March 2016
quotequote all
I will check tonight I have all the gears for both sets. 1 set is in the supplied box the other is loose but all gears are marked so you can still find the correct one when building the gearbox.

Here is a couple of pages from the manual to give you an idea of what to do with it.





These were made by US Company who no longer exist. I assume they must be rare in the UK.

Edited by Getsis on Thursday 3rd March 14:07

Dogwatch

6,312 posts

235 months

Thursday 3rd March 2016
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Looks a great idea!

Only pity is that you buy the kit and are left with a near full set of gears.

Getsis

Original Poster:

1,540 posts

229 months

Thursday 3rd March 2016
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You can by a "fixed" gearbox but they are expensive. this kit allows you to change your cars final drive as many times as you like without the need for buying another fixed gearbox or re-calibration again.

Carsie

936 posts

217 months

Thursday 3rd March 2016
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What a wonderful piece of kit; please don't destroy it by selling it piece meal- yes it's anachronistic but wonderful in it's tactility, "usefulness" and the history attached to it.

I bought my son, who's an architect, a Craftsmen's Fowlers 12/10 Calculator, as a gift for xmas- absolutely bally useless in what he's doing, he'll use a scientific calculator and get far better results but heh! why drive a Triumph TR4 or a Citroen 2CV or etc etc?

Wonderful - thank you for sharing. smile

Edited by Carsie on Friday 4th March 10:35

garagewidow

1,502 posts

183 months

Thursday 3rd March 2016
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Riley Blue said:
For years I've put off having my Riley's speedo recalibrated due to none standard wheels and tyres. It's so far 'out' that I use a speedo app on my mobile phone instead. This gizmo would completely solve the problem! If you're wanting to sell, please PM me with a price.
I used a bicycle speedo for a while when my speedo cable broke and couldn't be bothered to renew it at the time.
it worked well with a magnet target in the wheel rim,...I was surprised that the readout went up to 255mph or something like that.

Yertis

18,906 posts

279 months

Friday 4th March 2016
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Dogwatch said:
Looks a great idea!

Only pity is that you buy the kit and are left with a near full set of gears.
confused I've got a whole garage full of unused stuff like that – idea it'll come in useful one day... biggrin

Especially kits of things like taps and dies.

Slidingpillar

761 posts

149 months

Friday 4th March 2016
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garagewidow said:
I used a bicycle speedo for a while when my speedo cable broke and couldn't be bothered to renew it at the time.
it worked well with a magnet target in the wheel rim,...I was surprised that the readout went up to 255mph or something like that.
Quite popular among the vintage fraternity. You can get a cycle speedo with large digits, yet the small overall size makes it easy to mount in both a well hidden yet readable place. Calibration is pretty easy too.

Not widely known, but speedos only became compulsory in 1934 and many budget cars and motorbikes sold before then did not have a speedo at all.

skeggysteve

5,724 posts

230 months

Friday 4th March 2016
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Slidingpillar said:
Not widely known, but speedos only became compulsory in 1934 and many budget cars and motorbikes sold before then did not have a speedo at all.
I've told this tale on here before but I,ll tell it again.

The vicar at my school had a Brough Superior (well he had five and two Morgan 3 wheelers), not that I'm saying the Brough was a budget bike mind!

The Brough didn't have a speedo so me, 13/14 years old, asked him how he knew what speed he was doing, he replied that as the lamp posts in a 30mph areas were space a certain distance apart he had worked out that when the bike was firing at every lamp post he was doing 70 mph!

wildoliver

9,131 posts

229 months

Friday 4th March 2016
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I think you have a buyer for one, I'd probably take the other one for my camaro project depending on price.

PM me when you have an idea, I'd be happy with the loose kit.

dig123

339 posts

129 months

Sunday 6th March 2016
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Great piece of kit could do with on on my car but the speedo also jumps around like a yo yo the faster you go not sure this would fix it.

Slidingpillar

761 posts

149 months

Sunday 6th March 2016
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A jumpy speedo is usually cause by the cable sticking. Try oiling it!

dig123

339 posts

129 months

Sunday 6th March 2016
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Thanks for that will give it a go, I have also put the mph on the rev counter for top which is quite accurate.

Getsis

Original Poster:

1,540 posts

229 months

Monday 7th March 2016
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Sorry for the delay, I have only managed to find one of the kits. I definitely have another so will continue to look. I have had a lot of messages regarding these and while looking I found the receipt for one of the sets it cost me $100 plus shipping so I will take £50 plus postage.

V10Mike

602 posts

219 months

Monday 7th March 2016
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Getsis said:
Sorry for the delay, I have only managed to find one of the kits. I definitely have another so will continue to look. I have had a lot of messages regarding these and while looking I found the receipt for one of the sets it cost me $100 plus shipping so I will take £50 plus postage.
Hi Getsis, hopefully you got my PM a few days ago expressing interest -I will certainly take one for the Gordon-Keeble at £50!

Bergsi

1 posts

36 months

Monday 23rd May 2022
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Hi Getsis,

do you still have one of these correction boxes? - I bought a KS Trip Counter recently to use it in my MGA. The original T-piece did not fit with the car. So we installed a Halda T-piece. Now the trip counter runs but gives completely incorrect distances (so not sligt differences but half of what I drove).

Any hints or correction boxes / tools are welcome. Also if you have experience with KS TC in MG cars.

Thx!!

austin

1,313 posts

216 months

Tuesday 24th May 2022
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If anyone has one or knows where to buy one of these I need one as well. Got a project and will be swapping back axle ratios and wheel size etc so this would be really useful.

markBrunt

1 posts

2 months

Saturday 1st March
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Hi appreciate your post about the speedometer ratio correction box was many years ago do you recall the name of the unit pleas and the manufacurere I need one for my project car