MK5 Golf GTI
All Things Mk5 => Mk5 General Area => Topic started by: ljc19630 on October 28, 2019, 06:55:41 pm
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Evening fellow GTi-ers
Does anyone know the average MPH that the speedos are out by? I know that most, if not all are calibrated minus speed, i.e. speedo shows 70mph, but you're doing below that. Also does this change the faster you go? I am curious as I hit a certain speed today (on a private strip) thats somewhat surprised me :evilgrin:
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Legally 2% accuracy if you have a sat nav check it against that
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Mines about 10% out so 77 mph on the clocks gives 70 gps mph. 55mph clock gives 50 gps mph. Roughly.
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Legally 2% accuracy if you have a sat nav check it against that
That’s a very low margin for error, I heard it was 10% -speed cameras are set to over 10% +a bit more to allow for this acceptable error
Mine is out by about 10% too - my first vag car to be out by so much
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speed camera rules have changed tightened up 2 people I know got done 34mph in 30 north rd. cardiff
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speed camera rules have changed tightened up 2 people I know got done 34mph in 30 north rd. cardiff
So 10% + a bit then ;)
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speed camera rules have changed tightened up 2 people I know got done 34mph in 30 north rd. cardiff
Cough...money grabbers
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It's within 5% at urban speeds but the faster you go, the worse it gets. I've seen an indicated 130 show as 120 on the GPS, but that is probably deliberate for forum bragging rights!
The only way to check it accurately is with a Racelogic GPS unit as it uses much, much better telemetry. Phones and TomToms are rubbish. That's why all the car reviewers and race teams use it.
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You can change the coding to be more accurate. I did it with odbeleven, go to dashboard / coding / impulse, change the last 2 digits to 07 (which is maximum), my original coding was 0007403 and I changed it to 0007407. The coding is for changing wheel sizes, I'm on 17s, so it corrected the error. When I'm doing 40 on the gps its 40 on my speedo, 68 on my gps is 70 on my speedo.
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Good to know :happy2: If it's that accurate up to 70, I think I'm due a ticket in the post soon :doh:
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Mine is the other way, the wheels should show minor differences but the speedo reads higher than that error according to the GPS speedo on google maps navigation.
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Just digging this thread back up as I got a speeding ticket the other week on the motorway.
Now I’ve always thought I was tearing passed people on the motorway but just assumed everyone was going steady to preserve mpg…
I’m an old fart so I only potter around anyway so I was pretty surprised when I got clocked at 80mph on the motorway.
So I’ve been to a private road to test my speedo against google maps gps. The results were quite alarming…
Up to 60mph I got the usual VW 10% under, but then over 60, my speedo barely moved. So an indicated 70mph on my clocks and gps says 81mph… at an indicated 80mph gps says 93mph…!!
Like I say, an indicated 55mph and the gps says 50mph, so all good there. Also tested google maps gps against the wife’s car and it was spot on.
Anyone ever heard of the before? It looks like my speedo needle basically slows down after 60mph. I’ll be doing 65 from now on!
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The speedo when plugged into VCDS can be adjust for wheel circumferences...........distance impuls number
http://wiki.ross-tech.com/wiki/index.php/VW_Golf_(1K)_Instrument_Cluster
I adjusted mine ages ago, when I went from 17" to 18"
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The speedo when plugged into VCDS can be adjust for wheel circumferences...........distance impuls number
http://wiki.ross-tech.com/wiki/index.php/VW_Golf_(1K)_Instrument_Cluster
I adjusted mine ages ago, when I went from 17" to 18"
But that would compensate for a fixed error, so it would constantly under read by a greater/smaller margin. Mine under-reads 10% as per the manual but only up to 60mph, then it starts over-reading. Also dynamically, as it it doesn’t overread 10%, it’s 5%, then 12%, then 20%…
What I am wondering is if I have the right clocks installed… years ago when R-Tech remapped the car, they commented on the clocks looking different. I guess if they were clocks from a different car, that might explain it…
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(https://i.ibb.co/b6ffG2D/IMG-8596.jpg)
These are my clocks.
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No image that I can see
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On thr image posted - speedo face has more increments than a standard mk5 GTI set, ironically looks like a calibrated speedo you see in some Police cars! :driver:
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Yeah… just looking on eBay and I can’t find any like mine at all.
Looks like mine should be 20mph increments and top out at 180mph.
I’ve had the car over 3 years and this is the first I’ve ever noticed this…! Like I say, I don’t usually go over 70mph so it’s never been an issue before…
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(https://i.postimg.cc/jdK91qhb/clocks.webp) (https://postimages.org/)
Thats how my old Edition 30 dash was like.
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I can see the photo now. That does look very different and out of place for a GTI. Seems to sit wrong in the cluster frame too
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I’ve Google image searched and still can’t find anything anywhere near similar.
The closest dial that only closely resembles it is mk4 dials…
It’s odd because the rev counter looks correct…!
There’s nothing in the history file about it. Going to check the odometer now through the ODB port… gulp
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Not a Golf cluster but found this image of an ex Police car dash.
OCD kicking in about the thread title spelling :fighting2:
(https://i.postimg.cc/qBn3NQTQ/pigclocks.webp) (https://postimages.org/)
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(https://i.ibb.co/b6ffG2D/IMG-8596.jpg)
These are my clocks.
To me it looks like either the speedo has been changed with one from a different car or a different face has been stuck over the original to maybe change from km/h to mp/h. Is the car an import?
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I bought these off Lockwood they're also on eBay for my import. If you look after 50 mph the increments change. So for some reason on import cars the Speedo doesn't go up in a linear fashion.
(https://i.postimg.cc/1X0P9c10/Screenshot-20241011-192412.png) (https://postimg.cc/2L5gGW63)