Calibrating

Hi guys, as per title, does anyone know or can explain in lay mans terms what I would need to do to calibrate my speedo? I know it's well out and have bigger wheels fitted. It's a series 2a with 200tdi fitted. DIY job or into garage?
All help appreciated.

I'd first use a sat nav to see just how far out the speedo is

Know Defender has a drive cog you can change off the gear box to alter the speedo drive ratio

Have to confess don't know if that's the same with a Series

Don't know if relevant

http://www.tr3a.info/PDFs/speedo.pdf

I use a cheap 7" tablet with GPS in my Transit as the speedo is unreliable, it has proved to be very accurate, shows MPH, KPH or knots, 3 mileage trips, max speed indicator and alarm and can be overlaid on Google maps. Cost £70, let me know if you want details.

one here for half that price DATA.

7'' Inch 128MB 4GB FM Touch Screen Car Navigation GPS SAT NAV UK Free Maps | eBay

gemsdad said:

one here for half that price DATA.

7'' Inch 128MB 4GB FM Touch Screen Car Navigation GPS SAT NAV UK Free Maps | eBay

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That's cos it does less than half as much, no email, no phone, no music player, no camera, no photo files, only UK maps rather than everywhere etc

Datatek said:

That's cos it does less than half as much, no email, no phone, no music player, no camera, no photo files, only UK maps rather than everywhere etc

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he wants to use it for speed checks,not holding a raveup.

gemsdad said:

he wants to use it for speed checks,not holding a raveup.

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Good to have the other things though

Loads of free apps to use on a smart phone.
I've got one that throws the speed onto the windscreen.
Uses GPS so probably more accurate than the speedo

Datatek said:

Good to have the other things though

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bit difficult to use when you are driving though.

biggeeeee said:

Loads of free apps to use on a smart phone.
I've got one that throws the speed onto the windscreen.
Uses GPS so probably more accurate than the speedo

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Yep, any Android smart phone, I use digiHUD, can display on the device or head up on the screen, HUD not too good in bright sunlight though.

You can run "MemoryMap" on that , so good for greenlaning as well .

I just used the gps in my hudl to find out at what point 30 40 50 etc is on the speedo and drive accordingly, 28 is 30, 46 is 50

Thanks for replies guys, I had sat nav which gave me mph (said sat nav died the other day) and have said adjustments clocked into the grey matter, have used the iPad but it seems to lag a little. I will get another at some point (data tech appreciate details of one your on about).
Would have preferred to have had accurate speedo but we can't have it all or can we?

TheQ said:

I just used the gps in my hudl to find out at what point 30 40 50 etc is on the speedo and drive accordingly, 28 is 30, 46 is 50

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Its a good idea to do this and mark your speedo with something for a quick visual