Speedo reading

[tonyp]

Just checked my speedo against those flashy speed display things sprouting like dandelions everywhere - indicated 50 mph = 43 mph on flashy thingy. goodness knows what indicated 90 equals - will pluck up courage (sorry, idiocy) to find out

Standard wheels & tyres (original NCT's) - common problem ?

[oneshot]

That seems high - 14% over reading. Speedos are allowed to over read by 10% but very few are actually that far out.

[tonyp]

New speedo -

[Killboy]

How accurate are the 'flashy speedy things' though?

There is one on a road by me that flashes up 30mph when you walk passed it!

Edited July 12, 2006 by Killboy

[USAndretti42]

I would take a trip on the M6 running at a steady speed while timing yourself past several distance markers next to the road. I forget how far apart they are now, but I am sure someone on the forum can remind us. Then you can work out your true speed without relying on displays designed to slow you down.

[WayneB]

Maybe the Giugiaro shape is a early example of stealth technology?

(never had a speeding ticket in mine!)

Are black Esprits totally invisible to radar?

Edited July 12, 2006 by WayneB

[nicksoldies]

I wouldn't take much notice of those 'flashy things'. They're supplied by the state so they're bound to overestimate your speed in order to slow you down even more. They'll have a man with a red flag walking in front of our cars soon.

[Jussi]

Almost everytime I have prepared to test speed on those "flashy speedy things" they weren't working

Nearest is about 50km. from us and last time it worked was 2years ago

[dodgy]

I would take a trip on the M6 running at a steady speed while timing yourself past several distance markers next to the road.  I forget how far apart they are now, but I am sure someone on the forum can remind us.  Then you can work out your true speed without relying on displays designed to slow you down.

<{POST_SNAPBACK}>

steady speed! when were you here last

[PVK 596Y]

Or get yourself a Cyclops GPS camera warning device. They show your speed when not warning you of a camera site, and are much more accurate than your speedo. They were selling them for under

[Tony K]

If you have a friend who owns a boat, he probably has a GPS. Most accurate way to test that I know!

[tonyp]

Cyclops looks pretty useful, will keep an eye on ebay. SJ can re-calibrate for a modest sum so will do that over the winter.