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Re: 3.7 l Roadster advice please [Re: John V6] #662740
17/09/20 02:43 PM
17/09/20 02:43 PM
Joined: Jun 2015
Posts: 658
North Somerset, UK
Deejay Offline
Talk Morgan Regular
Deejay  Offline
Talk Morgan Regular

Joined: Jun 2015
Posts: 658
North Somerset, UK
on a plus 4, the speedo can be recalibrated. Keep the trip recorder button under the dash depressed whilst starting the engine and a code will appear in the mileometer. as each digit flashes, it can be changed by multiple presses of the reset button and will finally revert to normal mileage reading. think a plus 4 was something like 008386, but guess codes vary for different models. Don’t know how much the number needs to be changed to achieve a significant alteration though but others might?
Also, if the speedo is difficult to read with tonneau in place, why not swap positions of rev counter and speedo. (unless you are always driving to the red line!) I am told that the wiring is usually long enough to do that.


Doug

2011 +4 in Rich Maroon
1972 750 “ComDom” sprinter
1958 Triton 650
1992 Triumph Trophy 900
Re: 3.7 l Roadster advice please [Re: John V6] #662744
17/09/20 03:05 PM
17/09/20 03:05 PM
Joined: Dec 2008
Posts: 18,790
South Yorkshire
DaveW Offline
Roadster Guru
DaveW  Offline
Roadster Guru
Member of the Inner Circle

Joined: Dec 2008
Posts: 18,790
South Yorkshire


DaveW
2005 Corsa Red Roadster S1
2016 Saffron Yellow (Narrow) AR Plus 4
Re: 3.7 l Roadster advice please [Re: John V6] #662782
17/09/20 04:51 PM
17/09/20 04:51 PM
Joined: Jul 2007
Posts: 17,805
Suffolk
John V6 Offline OP
Member of the Inner Circle
John V6  Offline OP
Member of the Inner Circle

Joined: Jul 2007
Posts: 17,805
Suffolk
The Mustang forum suggests reflashing the PCM. I will let Bell & Covill figure that out with MMC as they sold me an illegal car.
Meanwhile I have a cheap GPS speedo to help


JohnV6
2006 Indigo Blue Roadster S1
2014 Brooklands Edition Roadster "Brookland's Belle"
Re: 3.7 l Roadster advice please [Re: John V6] #662829
17/09/20 09:47 PM
17/09/20 09:47 PM
Joined: Jun 2020
Posts: 48
S
StevieMac Offline
Just Getting Started
StevieMac  Offline
Just Getting Started
S

Joined: Jun 2020
Posts: 48
I purchased a sat nav for touring around Cornwall, the added benefit being it had a speedo, although as stated earlier, I am not wholly convinced it is accurate - going by road side speed warning displays.

It is also a bit too much hassle for every day trips.

I did think about adding a digital readout that connected to the ODB port, is this worth it though? Would the data from the ODB port be more accurate?

Appreciate any guidance.

Steve

Re: 3.7 l Roadster advice please [Re: John V6] #662830
17/09/20 09:52 PM
17/09/20 09:52 PM
Joined: Apr 2014
Posts: 4,728
Llanelli
Ray Offline
Part of the Furniture
Ray  Offline
Part of the Furniture

Joined: Apr 2014
Posts: 4,728
Llanelli
My tom tom seems to match closely with my speedo and most roadside signs.


.+8 Now gone for a 1800 4/4. Duratec in bright yellow.
Re: 3.7 l Roadster advice please [Re: John V6] #662831
17/09/20 09:59 PM
17/09/20 09:59 PM
Joined: Dec 2009
Posts: 25,333
Devonshire
+8Rich Offline
Member of the Inner Circle
+8Rich  Offline
Member of the Inner Circle

Joined: Dec 2009
Posts: 25,333
Devonshire
I totally rely on my Tomtom and find it shows all three cars to be over reading by + 5mph, the variable Motorway speed limits agree with it so I'm assuming it's pretty accurate.
It's kept me safe from the revenue collectors since 1991 so somethings working, the best £90 I ever spent.


Regards Richard

1999 Indigo Blue +8
2009 4/4 Sport Green prev
1994 Connaught Green +8 prev





Re: 3.7 l Roadster advice please [Re: John V6] #662911
18/09/20 12:21 PM
18/09/20 12:21 PM
Joined: Feb 2016
Posts: 3,082
East Harling, Norfolk UK
Richard Wood Online NoMood
Talk Morgan Addict
Richard Wood  Online NoMood
Talk Morgan Addict

Joined: Feb 2016
Posts: 3,082
East Harling, Norfolk UK
Adrian's thread on the PCM (ECU) development leading to the one you have John is here. You will note there is specific reference to trip and speedometer anomalies!


Richard

2018 Roadster - Red/Magnolia - "Morton"
1966 Land Rover series 2a SWB
1960 Velocette Venom
Re: 3.7 l Roadster advice please [Re: John V6] #662931
18/09/20 03:12 PM
18/09/20 03:12 PM
Joined: Aug 2010
Posts: 3,185
Costock, South Nottinghamshire...
Paul F Offline
Talk Morgan Addict
Paul F  Offline
Talk Morgan Addict

Joined: Aug 2010
Posts: 3,185
Costock, South Nottinghamshire...
I have a GPS Speedo on the steering column. It agrees with roadside signs all the time and reads around the same as the speedo.

If you use self adhesive velcro on the steering column behind the dashboard and fabricate a bracket from an old tupperware box, you can make quite a neat unobtrusive fastening that is easy to remove when the time comes for the car to be sold. I power it from a USB socket fitted in the radio blanking plate.


Paul
Costock, UK
2014 4/4 Rolls Royce Garnet Red
Disco 4
Teddy - 17h1 Irish Draught cross
Re: 3.7 l Roadster advice please [Re: StevieMac] #662964
18/09/20 06:59 PM
18/09/20 06:59 PM
Joined: Nov 2015
Posts: 2,795
Yorkshire
CooperMan Offline
Talk Morgan Expert
CooperMan  Offline
Talk Morgan Expert

Joined: Nov 2015
Posts: 2,795
Yorkshire
Originally Posted by StevieMac
I purchased a sat nav for touring around Cornwall, the added benefit being it had a speedo, although as stated earlier, I am not wholly convinced it is accurate - going by road side speed warning displays.

It is also a bit too much hassle for every day trips.

I did think about adding a digital readout that connected to the ODB port, is this worth it though? Would the data from the ODB port be more accurate?

Appreciate any guidance.

Steve



Steve, that's what mine is, if you look earlier in the tread there's some photos


Jon M
Re: 3.7 l Roadster advice please [Re: CooperMan] #662981
18/09/20 09:52 PM
18/09/20 09:52 PM
Joined: Jun 2020
Posts: 48
S
StevieMac Offline
Just Getting Started
StevieMac  Offline
Just Getting Started
S

Joined: Jun 2020
Posts: 48
Originally Posted by CooperMan
Originally Posted by StevieMac
I purchased a sat nav for touring around Cornwall, the added benefit being it had a speedo, although as stated earlier, I am not wholly convinced it is accurate - going by road side speed warning displays.

It is also a bit too much hassle for every day trips.

I did think about adding a digital readout that connected to the ODB port, is this worth it though? Would the data from the ODB port be more accurate?

Appreciate any guidance.

Steve



Steve, that's what mine is, if you look earlier in the tread there's some photos


Cheers for the pointer Jon.

I was looking at something similar on the web before I went the Sat Nav route but that does look a little simpler,

How visible is the readout in bright light?

Steve

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