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Author How unreliable are Speedo's!!
Paul_J
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Registered: 6th Jun 02
Location: London
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17th Mar 03 at 01:11   View User's Profile U2U Member Reply With Quote

Just coming back from a gig at oxford. My mates spread across 3 cars in convoy a something 'Kia' (POS), my Corsa 1.2 SXI and a Fiesta 1.25. Each fully loaded with people.

The girl that drives the Fiesta 1.25 said that she had 120 mph on the clocks before, which for a car that the stats say can only do 106 I told her she was 'stupid'. No way could her car do 120...

We got on the motorway and left the kia behind imediately... I pulled away (slowly with a full load, sigh) - reaching (what my speedo said) 110 mph with ease... the fiesta kept close behind, then as my speedo said 112 - she started to drop off into the distance... So I pulled back into the inside lane and slowed back to 70... She comes past and her passengers are all like 'ahaha we're kicking your ass' - so I pulled back into the middle lane and follow her... both accelerating at about the same rate (pretty poorly coz of the passengers)... Both moving into the outside lane I was following her closely at about 110 mph, she then moved into the middle lane and we both started accelerating (note this was slightly down hill) - my speed increased to 116 mph at about 6k RPM (should be 120 shouldn't it at 6k?) - this fiesta was still slowly pulling away (like a couple of mph faster)...

I asked her afterwards what speed she saw and she said '120' again...

Both cars have a official stat figure of 106 mph... both 75 bhp...

I don't believe my car can go 116 mph, I know its speedo inacuracys - but how much are they out by? surely mine couldn't be out 10 mph and her's 14?

or could they?

Discuss... P.s. the roads were clear and no dangerous manouvers were done, no undertaking and plenty of space were given between cars, I do not think street racing is cool, and I don't speed outside schools...

Thanks,

Paul J
StuartVRS
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Registered: 9th Feb 03
Location: Bromley Common, Greater London
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17th Mar 03 at 01:33   View User's Profile U2U Member Reply With Quote

hmm, i know what you mean, i got 130 out of a 1.2 sxi, slightly down hill, with a few mods though, surely that cant be right......

id also like to point out that this was on the m20 and there was not another car on the moptorway at this time.
Happy_2008
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Registered: 13th Mar 01
Location: Kent
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17th Mar 03 at 01:40   View User's Profile U2U Member Reply With Quote

130 in a 1.2 sxi
IntaCepta
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Registered: 25th Mar 02
Location: Mill Hill East, Greater London
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17th Mar 03 at 03:00   View User's Profile U2U Member Reply With Quote

got 115 on my clocks 60bhp
maybes_aye_maybes_naw
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Registered: 22nd Sep 02
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17th Mar 03 at 03:25   View User's Profile U2U Member Reply With Quote

just think of it this way the speedo is displayed as analogue and think of it as ur watch and how u can never be exact what time it is unless its on like a number.....
IntaCepta
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Registered: 25th Mar 02
Location: Mill Hill East, Greater London
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17th Mar 03 at 03:50   View User's Profile U2U Member Reply With Quote

yea but that hasn't got anything to do with the inaccuracy of the speeds.
there could be inaccuracies in digital speedos as well
paul_spurrell
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Registered: 14th Sep 01
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17th Mar 03 at 07:29   View User's Profile U2U Member Reply With Quote

they are normally 10% out
Kayleigh
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Registered: 6th Jun 02
Location: England
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17th Mar 03 at 07:54   View User's Profile U2U Member Reply With Quote

When manufacturers test speeds they do it in a number of ways, including digital equipment mounted in the car and Radar guns similar to those used by the police. They ignore inacuracies such as tyre distortion at speed and so they're FAR more acurate than the crappy speedo u get in the car. If a corsa 1.2 Sxi could do 120 (or even 130)mph, Vauxhall would make dam sure they told everybody about it!!
Joff
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Registered: 17th Oct 00
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17th Mar 03 at 08:10   View User's Profile U2U Member Reply With Quote

I found my Speedo's to be highly unreliable. They're too tight around the crotch area and the elasticated waist perishes after only a couple of months.

Stick to swimming shorts - something from Quicksilver or Reef and you should be ok.

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Kayleigh
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17th Mar 03 at 08:11   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by Joff
I found my Speedo's to be highly unreliable. They're too tight around the crotch area and the elasticated waist perishes after only a couple of months.

Stick to swimming shorts - something from Quicksilver or Reef and you should be ok.

Joff [img]http://www.corsaweb.co.uk/pink_smiley.gif[/img]
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Kayleigh
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Steve
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Registered: 30th Mar 02
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17th Mar 03 at 08:26   View Garage View User's Profile U2U Member Reply With Quote

i had 133 on the clocks in my gti i believe i was doing 125mph
vibrio
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17th Mar 03 at 08:45   View User's Profile U2U Member Reply With Quote

120 on my clock is around 112. I like jap limiters eh Kindness




Vibrio

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Joff
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17th Mar 03 at 09:10   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by vibrio
120 on my clock is around 112.




I don't have 120 on my clock. Just the typical 12 hours on a sexagesimal clock.

Perhaps you are referring to a decimal clock?

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IntaCepta
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17th Mar 03 at 09:13   View User's Profile U2U Member Reply With Quote

maybe he's referring to the speedometre..
just maybe..!

Joff
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17th Mar 03 at 09:16   View User's Profile U2U Member Reply With Quote

Well that would be the first time the speedometer has been referred to in this thread.

All this talk of speedo's and clocks is very ambiguous and people should have more consideration when posting to use the correct terms.
Kayleigh
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17th Mar 03 at 09:18   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by Joff
Well that would be the first time the speedometer has been referred to in this thread.

All this talk of speedo's and clocks is very ambiguous and people should have more consideration when posting to use the correct terms.



Kayleigh
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Joff
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17th Mar 03 at 09:21   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by Kayleigh




You know it.


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Paul_J
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17th Mar 03 at 13:15   View User's Profile U2U Member Reply With Quote

Hehe, in a way I'm kinda relieved that my speedo is showing the wrong speed... I know getting caught doing say 106 and 116 still means I'd be in shit... but if it was 106 I wouldn't feel as guilty ...

and looking at that example, if it shows say 105 mph on the clocks I'm probably doing under 100mph!

So its all good.

Paul J
3CorsaMeal
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17th Mar 03 at 13:19   View User's Profile U2U Member Reply With Quote

my speedos smell of cholrine.
vibrio
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17th Mar 03 at 13:20   View User's Profile U2U Member Reply With Quote

Joff go back to sucking off retards (OJC in case you were wondering)




Vibrio

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