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Wales
by Joske Vermeule, September 1
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Forums39
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Jun 14th, 2026
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Joined: Aug 2019
Posts: 793 Likes: 144
Talk Morgan Regular
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Talk Morgan Regular
Joined: Aug 2019
Posts: 793 Likes: 144 |
Don't need a head up speed display with  in the passenger seat. Armed with the speedo in front of her nose, a seemingly built in GPS and the greatest vigilance of speed limits, I get constant audible feedback of my speed and limit transgressions. I just need to master the volume control  I have one of these - very nearly the same model. On a journey down the Fosse Way a few years ago, she had laryngitis and couldn’t do much more than whisper. Our journey time was reduced by 30 minutes. Me also. Must be the secret optional extra that comes FOC with every passenger seat!
Chris
2015 Plus 4 Silverlake Blue
(2014 3.7 Roadster Crystal Blue)
(2012 4/4 Sport Black)
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Joined: Aug 2010
Posts: 5,468 Likes: 172
Charter Member
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Charter Member
Joined: Aug 2010
Posts: 5,468 Likes: 172 |
Don't need a head up speed display with in the passenger seat. Armed with the speedo in front of her nose, a seemingly built in GPS and the greatest vigilance of speed limits, I get constant audible feedback of my speed and limit transgressions. I just need to master the volume control I have one of these - very nearly the same model. On a journey down the Fosse Way a few years ago, she had laryngitis and couldn’t do much more than whisper. Our journey time was reduced by 30 minutes.Did your MPG drop as well ? There was a minor change- around 10% IIRC. Don’t tell Mrs F - it adds to her “justification” for her role as arbiter of speed in all situations.
Paul
Costock, UK
Plus Four 75th - Furka Rouge - Pip
Disco 5
Teddy - 17h1 Irish Draught cross
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Joined: Nov 2018
Posts: 1,065 Likes: 23
Has a lot to Say!
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Has a lot to Say!
Joined: Nov 2018
Posts: 1,065 Likes: 23 |
About the calibration of the speedo, I‘ve got a 2018 plus4 (german Model) and the speedo has the same difference.
The difference is exactly 10%. So I drive 77KM/ it‘s real 70KM. I think it‘s wrong all over all MOGs from factory.
On the way home from Britain this year my friend and me want to know what she‘s able to do...
The speedo shows 190 KM/h, the nav says 172. (German Autobahn without speedolimit - clear) So I think the speedo shows the wrong speed all over the dial.
René
2018 plus4 (sports green)
with a homemade really shiny red tinted dash…
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Joined: Jul 2019
Posts: 922 Likes: 1
Talk Morgan Regular
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Talk Morgan Regular
Joined: Jul 2019
Posts: 922 Likes: 1 |
I have asked Bell & covill if it can be recalibrated somehow.
For now the Sat Nav is in use though at 2000 rpm
20 is in second
30 is in Third
40 in 4th
50 in 5th
70 in 6th
60 is 2.5k in 5th
Based upon the sat nav & your spreadsheet.
These are the same for my 09 Plus 4
Kevin
2009 Morgan Plus 4 - 4 seater
2015 Subaru Forester 2.0ltr
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Joined: Jul 2007
Posts: 27,831 Likes: 757
Member of the Inner Circle
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OP
Member of the Inner Circle
Joined: Jul 2007
Posts: 27,831 Likes: 757 |
Rene,
mine under reads so 70 is 77 mph. That I understand is illegal. I beleive car speedo should show the speed with a range of -0 to +10%.
The way my car is set up is n opportunity to lose my license.
JohnV6
2022 CX Plus Four
2025 Renault Scenic Alpine etech "Yvette"
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Joined: Sep 2009
Posts: 7,435 Likes: 122
Talk Morgan Guru
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Talk Morgan Guru
Joined: Sep 2009
Posts: 7,435 Likes: 122 |
We must distinguish two things here. Do I want to read an exact speed indication while driving? Or do I want to know exactly how long the distance travelled is in miles or kilometres?
As I have experienced, the relationship between these two objectives is fixed and unchangeably programmed.
So if you want to see the exact speed while driving, the odometer does not count enough kilometres driven.
If you want to see the exact distance, you will see more speed on the speedometer than it is while driving. This is because the speed indicator needs to show a little more than is. Strictly according to the law, the odometer has to be calibrated, and consequently the speedometer shows slightly higher values. Of course it should not be too much.
'14 4/4 graphite grey
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Joined: Feb 2016
Posts: 8,695 Likes: 415
Needs to Get Out More!
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Needs to Get Out More!
Joined: Feb 2016
Posts: 8,695 Likes: 415 |
Rene,
mine under reads so 70 is 77 mph. That I understand is illegal. I beleive car speedo should show the speed with a range of -0 to +10%.
The way my car is set up is n opportunity to lose my license. Didn't realise the 10% error was in that direction John given as you suggest, a speedo that under reads is illegal. Most over read to the tune of 5-8% as you know. Suggest having a look at the Mustang forums on this subject. A further thought is your factory modified PCM (ECU) may offer more tweaking opportunities given its the device the gearbox output sensor communicates with ![[Linked Image]](https://www.series2club.co.uk/new_forum/Smileys/wittsends/nixweiss.gif) . Indeed that PCM may be the cause of the issue, as I believe the testing Adrian (AJSki2fly) did on behalf of MMC involved such.
Last edited by Richard Wood; 17/09/20 08:33 AM.
Richard
2018 Roadster 3.7
1966 Land Rover S2a 88
2024 Royal Enfield Guerrilla 450
1945 Guzzi Airone
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Joined: Nov 2018
Posts: 1,065 Likes: 23
Has a lot to Say!
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Has a lot to Say!
Joined: Nov 2018
Posts: 1,065 Likes: 23 |
Rene,
mine under reads so 70 is 77 mph. That I understand is illegal. I beleive car speedo should show the speed with a range of -0 to +10%.
The way my car is set up is n opportunity to lose my license. Oh, John, yes. I was wrong. My speedo is optimistic and give me the illusion of a 120miles +4... A speedo with showing you ´re to slow is also not roadlegal in Germany. And as Heinz sayed, if it shows you are too fast/ slow it´s the same difference in the distance you drive. René
2018 plus4 (sports green)
with a homemade really shiny red tinted dash…
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Joined: Jul 2007
Posts: 28,909 Likes: 354
Salty Sea Dog Member of the Inner Circle
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Salty Sea Dog Member of the Inner Circle
Joined: Jul 2007
Posts: 28,909 Likes: 354 |
Rene,
mine under reads so 70 is 77 mph. That I understand is illegal. I believe car speedo should show the speed with a range of -0 to +10%. Correct. Both my 4/4 have under read speed (it's why I have added GPS based speedometers). I think in both cases (they were/are mechanical) that is likely due to lack of use by previous owners. However, as yours is electronic, it sounds as though it has been incorrectly calibrated.
Graham (G4FUJ)
Sold L44FOR 4/4 Giallo Fly
'11 MINI Countryman Cooper D All4
'90 LR 90 SW
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Joined: Jul 2007
Posts: 27,831 Likes: 757
Member of the Inner Circle
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OP
Member of the Inner Circle
Joined: Jul 2007
Posts: 27,831 Likes: 757 |
I think so Graham along with the fuel gauge. B&C are working on it.
I know other Roadster owners where it was spot on.
My GPS speedo arrived today so will add that.
JohnV6
2022 CX Plus Four
2025 Renault Scenic Alpine etech "Yvette"
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