has anyone seen these stickers? - wouldn't that mean if you used a standard 90pmh clock your speed would not be correct? and how the hell would it light up at night? hmmmmmmm. good idea i guess... cheeper then the real thing
http://www.ebay.co.u...d=230899494900

Home Made 120Mph Speedo?
Started by
Shane.spears.91
, Jan 09 2013 10:03 PM
7 replies to this topic
#1
Posted 09 January 2013 - 10:03 PM
#2
Posted 09 January 2013 - 10:23 PM
Yeah your speedo would be out, I think its just down to looks not anything practical
#3
Posted 10 January 2013 - 07:55 AM
The sticker won't affect the panel lights but you would need the speedo recalibrating.
#4
Posted 10 January 2013 - 08:18 AM
Problem with recalibrating the speedo is that it would then be cheaper to just buy a new cooper S speedo http://www.minispare...do/13H4442.aspx
changing the speedo drives is an option but the shift in TPM is so much that it's quite possible that you will not get the drive ratio slow enough to make the speedo read right...
For example, most speedo's like this are on cars with 10" wheels with shorter ( 3.44 ) final drives, the most common TPM for these speedo's is 1280, it looks like the 120mph mark is approximately where the old 90mph mark would be, which means theres a +33% shift therefore the speedo to read right must turn @ 960 tpm to read right. This is too low for the speedo drives available for the mini to get an approximate let alone accurate reading.
If you start with the speedo from an 850 then there's more chance, as the TPM for these is 1376, which works out to a more reasonable 1032 TPM.
If you want to know how to determine the tpm of your speedo.... http://www.guess-wor...Tech/speedo.htm
to work out the conversion factor TPM x 90 / 120 or TPM x 0.75
To then work out what you need... http://www.guess-wor.../Tech/ratio.htm
(because your tpm is calculated there may not be an exact match but pick the closest )
changing the speedo drives is an option but the shift in TPM is so much that it's quite possible that you will not get the drive ratio slow enough to make the speedo read right...
For example, most speedo's like this are on cars with 10" wheels with shorter ( 3.44 ) final drives, the most common TPM for these speedo's is 1280, it looks like the 120mph mark is approximately where the old 90mph mark would be, which means theres a +33% shift therefore the speedo to read right must turn @ 960 tpm to read right. This is too low for the speedo drives available for the mini to get an approximate let alone accurate reading.
If you start with the speedo from an 850 then there's more chance, as the TPM for these is 1376, which works out to a more reasonable 1032 TPM.
If you want to know how to determine the tpm of your speedo.... http://www.guess-wor...Tech/speedo.htm
to work out the conversion factor TPM x 90 / 120 or TPM x 0.75
To then work out what you need... http://www.guess-wor.../Tech/ratio.htm
(because your tpm is calculated there may not be an exact match but pick the closest )
#5
Posted 10 January 2013 - 10:38 AM
Ive seen the sticker, its something just for the look..
The KPH scale will still be wrong, in a short, you can get an MK1 speedo and change the speedo drive to recalibrate it to the new scale, otherwise one of the two scales (MPH-KPH) will be wrong.
You also need to cut out the holes for the bulb holes, i cant see the illumination being a problem on these.
The KPH scale will still be wrong, in a short, you can get an MK1 speedo and change the speedo drive to recalibrate it to the new scale, otherwise one of the two scales (MPH-KPH) will be wrong.
You also need to cut out the holes for the bulb holes, i cant see the illumination being a problem on these.
#6
Posted 10 January 2013 - 10:49 AM
Might make mine read correct - certainly does not not at the moment!
#7
Posted 10 January 2013 - 12:54 PM
How many cooper speedo's are going to crop on ebay?
#8
Posted 10 January 2013 - 07:42 PM
Problem with recalibrating the speedo is that it would then be cheaper to just buy a new cooper S speedo
But the transfer sticker thing is for a Mk 1 not a Mk 2/3.
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