recalabarating speedo

dan dan the landy man · Jun 15, 2008

I'm putting range rover diffs in my series n i got the bigger colway mud terrains so obviously the speedos goin to b well out so wondered if i could recalabarate the speedo or if there was a cmany that specialised in this.
Thanks Dan

Pikey · Jun 15, 2008

Just buy a satnav and use that to check your speed and either write down on a bit of paper stuck to the dash or mark the speedo wiv tippex.

The Mad Hat Man · Jun 15, 2008

yes you can

speedy cables Ltd

Trewey · Jun 15, 2008

The Mad Hat Man said:
yes you can

speedy cables Ltd

wonder why they ask you to measure the radius of the tyre, as well as it's circumference?

metallicachick86 · Jun 15, 2008

redhand said:
Just buy a satnav and use that to check your speed and either write down on a bit of paper stuck to the dash or mark the speedo wiv tippex.

We thoughta that, but my tomtom is 4mph ish slower, too much maths to think about

Pikey · Jun 15, 2008

Gps is never slower. I think you'll find that your speedo is recording 4mph faster?

metallicachick86 · Jun 16, 2008

redhand said:
Gps is never slower. I think you'll find that your speedo is recording 4mph faster?

Possibly, never thought about it like that. Atleast i'll never get a speeding ticket!

Pikey · Jun 16, 2008

A GPS takes a fix from several satellites in order for it to figure out what it's position and altitude is. it repeats this process at a fixed interval. (lets say every 5 seconds) by working out how far it has travelled in those 5 seconds. (Say it's 147yards,) then the GPS then knows that it's travelling at 60mph. So it's never wrong. Whereas a speedo rarely shows the correct speed.

Grippa · Jun 17, 2008

I've just got a wee laminated sticker on me dash giving the actual speeds I'm travelling when me speedo reads 30, 40, 50 etc. With RR diffs & 235/85s the conversion factor on me III is about 1 : 1.46. It's a piece of **** to read & you soon remember what's what.

slob · Jun 17, 2008

redhand said:
A GPS takes a fix from several satellites in order for it to figure out what it's position and altitude is. it repeats this process at a fixed interval. (lets say every 5 seconds) by working out how far it has travelled in those 5 seconds. (Say it's 147yards,) then the GPS then knows that it's travelling at 60mph. So it's never wrong. Whereas a speedo rarely shows the correct speed.

wot appens if yer travel fer less than (say 5 secs) and less than (147yards)?. would it be wrong then?

Grippa · Jun 17, 2008

slob said:
wot appens if yer travel fer less than (say 5 secs) and less than (147yards)?. would it be wrong then?

Wot, like a Gaylander between breakdowns yer mean?

recalabarating speedo

dan dan the landy man

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Pikey

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The Mad Hat Man

Well-Known Member

Trewey

Cockernee, Pasty munchin bastid.

metallicachick86

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Pikey

Dummy Ejection Facilitator..

metallicachick86

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Pikey

Dummy Ejection Facilitator..

Grippa

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slob

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Grippa

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