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J_A_R_B
07-12-2006, 18:29
Hi All


I often get concerned when going through speed cameras that people driving visibly faster and slower and wondered those with GPS how accurate the williams speedo is.

northy
07-12-2006, 18:45
My one was around 3mph out mate on my GPS.

J_A_R_B
07-12-2006, 18:50
Thanks northy just get bit worried when see people going loads slower through cameras especially as speedo needle bounces a bit (sounds daft).

Andyvalver
07-12-2006, 18:56
People always worry about speedo's reading a higher speed than your going, but can they work the other way? Actually read a slower speed? So when your speedo says its doing 90 you could be doing a 100? :)

J_A_R_B
07-12-2006, 19:30
Having done a bit or reading legally they have to read higher than your actual speed 0-10% margin

Zollo
08-12-2006, 11:05
Mine's only a couple of MPH out according to my sat nav. Most accurate speedo I've compared the sat nav too, as it happens 8)

Swervin_Mervin
08-12-2006, 14:55
10%. Trust me I used my last employer's speed gun to test the local flashing speed sign. :P

You could go through a camera doing an indicated 45 no trouble.*







*DISCLAIMER - In no way will I be held responsible if you do and your speedo's more accurate than mine. :twisted:

Purple
08-12-2006, 15:11
Tyre size, make and model plays a part in the accuracy as well. Even different tyres of the same rated size can have slightly different rolling distance.

Craig
08-12-2006, 17:39
many factors make a difference, but generally at 30mph, usually about 3-4mph out. the faster you go the more they are out!

Martin
08-12-2006, 18:48
Mine is 2-3mph out at 100mph using pod timing.

wavy
08-12-2006, 20:16
Having done a bit or reading legally they have to read higher than your actual speed 0-10% margin


is that right :?:

Rob72
08-12-2006, 20:34
is gps speed reading 100% accurate..??
would like to know this for peace of mind as im about to buy a road angel.

Craig
08-12-2006, 20:48
Having done a bit or reading legally they have to read higher than your actual speed 0-10% margin


is that right :?:

i think so to be on safe side, if u got done for speeding and clock said 30 bang on, then u could sue the car manufacturer. better to be a few mph out in the other direction! :D