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 Posted: Fri May 18, 2012 12:13 pm |
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Joined: Mar 15, 2012
Posts: 327
Trade Rating: 0
Location: Essex
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Not sure if its due to the change of alloy/wheel size but im pretty sure it is,my speed reads around 20% out (too high) which i THINK is also illegal/mot failure currently. Is the only way to correct this by paying an extortionate rate for a garage to plug into the ecu and reset the wheel size parameters?
Just wanted to check this before i go in and do it incase the guys taking me for my pay-cheque 
Oh,its a 206 quicksilver as the sig says lol
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| Joined the GTi massive 10/1/13
Goodbye lairy Pugani (quicksilver 1.4) | |
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Posted: Fri May 18, 2012 12:16 pm |
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Joined: Jul 21, 2011
Posts: 791
Trade Rating: +5
Location: Bourne, Lincs
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well i got 17inch on mine and i do the speed limit past speed cameras and never get flashed
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| Ford Focus RS in white of course 
filled with all sorts of goodies | |
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Posted: Fri May 18, 2012 12:26 pm |
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Joined: Jan 05, 2011
Posts: 2985
Trade Rating: +36
Location: North Manchester
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Mines 5mph out. No issues with MOT and I just adjust my speed accordingly. Never bothered me so wouldn't pay out the money to get it sorted.
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Posted: Fri May 18, 2012 12:30 pm |
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Joined: Mar 03, 2010
Posts: 2635
Trade Rating: +11
Location: Black Country Ay I
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Posted: Fri May 18, 2012 12:30 pm |
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Joined: Mar 15, 2012
Posts: 327
Trade Rating: 0
Location: Essex
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5mph aint too bad,but 20% out at 70 is a big difference. i can compensate easilly enough,but in turn its also bumpin up the mileage on an already high mileage pug. just wondered if there's another way
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| Joined the GTi massive 10/1/13
Goodbye lairy Pugani (quicksilver 1.4) | |
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Posted: Fri May 18, 2012 12:32 pm |
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Joined: Feb 07, 2010
Posts: 2505
Trade Rating: +19
Location: West mids
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Do they even check your speedo on an MOT as they don't drive the car do they. I heard that a sat nav speed is just as accurate as the one on the car?
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Posted: Fri May 18, 2012 12:43 pm |
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Joined: Feb 07, 2010
Posts: 13077
Trade Rating: +65
Location: England
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GPS is a lot more accurate than the speedo on constant speed. Speedo is more accurate on harsh acceleration.
Them calculators are inaccurate and shouldn't be trusted.
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Posted: Fri May 18, 2012 12:48 pm |
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Joined: Mar 03, 2010
Posts: 2635
Trade Rating: +11
Location: Black Country Ay I
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Really? Because when I changed my alloys and comapared the speedo change to my GPS it was on song with the calculator I posted.
But of course I'm an idiot and that calculator should be ignored...
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Posted: Fri May 18, 2012 12:49 pm |
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Joined: Feb 07, 2010
Posts: 13077
Trade Rating: +65
Location: England
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Depends on your speed sensor
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Posted: Fri May 18, 2012 12:54 pm |
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Joined: Feb 07, 2010
Posts: 2505
Trade Rating: +19
Location: West mids
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Do you have a sat nav that has a speedo and compare it to that
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Posted: Sat May 19, 2012 5:24 am |
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Joined: Mar 27, 2010
Posts: 3017
Trade Rating: 0
Location: Running from Ant and Lee and Adam...........
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MOT doesn't check speedo because they don't drive the car.
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Posted: Sun May 20, 2012 9:50 am |
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Joined: May 19, 2012
Posts: 75
Trade Rating: +2
Location: UK
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Well atm I have 195/55 15'' and when I do 70MPH on the speedo the GPS shows I'm doing 66-67MPH.
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| 2001 Peugeot 206 2.0 HDi 90 D TURBO in China Blue (98-01) [57 MPG] | |
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Posted: Mon May 21, 2012 12:47 am |
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Joined: Jan 08, 2012
Posts: 67
Trade Rating: 0
Location: Cardiff
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thats normal for the speedo to over read 
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Posted: Mon May 21, 2012 8:19 am |
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Joined: Feb 07, 2010
Posts: 2505
Trade Rating: +19
Location: West mids
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That's sounds about what I get.
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Posted: Sun Jul 08, 2012 10:27 am |
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Joined: Mar 15, 2012
Posts: 327
Trade Rating: 0
Location: Essex
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yeah,that caluclator doesnt work for me,it says speed on 30mph then real speed is 29.59mph,when actually it closer to speedo on 30 then real speed is 24-25 lol,and it gets bigger as you go
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| Joined the GTi massive 10/1/13
Goodbye lairy Pugani (quicksilver 1.4) | |
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