Speedo calibration

[Ripper]

As all speedos are inaccurate and what with zero tolerance from the police (certainly in the Avon and Somerset area) I'm seriously considering getting my speedo calibrated (as long as we're not talking silly money).

As I haven't got the faintest where to get this done is this a viable option and who'd do it?

Or am I living in cloud cuckoo land?



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Ripper

Grey 1993 S13

[Jon]

Do it yourself.

Find a road with a 'measured mile' and drive it at an indicated 60mph. Stopwatch it to see how long it takes you.

e.g. If it takes 64secs to drive the mile you are actually doing 56mph.

You cannot sensibly get the speedo to read accurately.

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Jon in Dewsbury
'95 blue/green S14

[Papa Lazarou]

Apparently http://www.speedograph-richfield.co.uk/ will re-calibrate most speedo's not just old ones. May be worth giving them a call. Also, imports need the speedo's recalibrated so maybe an SVA preparation specialist can help also?

[JB]

For some good info on what to do if you do get stopped for speeding look at www.ukspeedtraps.co.uk (http://www.ukspeedtraps.co.uk) There's some stuff there about what plod have to do with regard to calibrating their speedos.

Or for a more pro-active approach (whatever that means, try www.snooper.co.uk (http://www.snooper.co.uk) http://300zx.co.uk/200sx/ubb/smile.gif

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JB
'00 Emerald S14 auto
http://cwm.ragesofsanity.com/otn/mfinger/thefinger_red.gif to XR2s, 3s, lowered Saxo VTRs,
crapped out Cavaliers and ALL BMWs

[geoff_s14]

Speedo calibration is certainly an issue if you replace your wheels/tyres with ones of different overall diameter, as this will alter the rolling radius size, so the distance travelled for every rotation of the axel is affected. eg going form 17 x 205 with a 60 profile to 18 x 225 on a 40 will reduce the rolling radius from 1574 to 1413mm, so your speedo will read optomistically by approx 10%.

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Geoff
S14, logbook says emerald, actually dirt coloured.

[SXOC Admin]

Its virtually impossible to get a stock analogue speedo to read accurately.

You'll need a fapping expensive piece of kit to do that.

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Dave Refault
Owner - Nissan200sx Web
S13 - Mild Mods.

[craig]

Originally posted by Dave_Refault:

You'll need a fapping expensive piece of kit to do that.



hehe.. i wonder what magazine you read Dave... lol

sorry... just happened to see one over the weekend, and remembered why i stopped buying http://300zx.co.uk/200sx/ubb/wink.gif


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UK 92 300ZX TT White
Mongoose K&N AVCR
KYB Eibach