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Home > Help Needed / General Tech Chat > Final drive/speedo options

Jack2eaton

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75 Posts
Member #: 9772
Advanced Member

Sheffield

Hi Guys

Just go my mini back on the road after starting this project 9 years ago and aside from a few teething problems all seems good except for... I have changed from an MpI 2.7 final drive to a 3.2 which is throwing my speedo off a fair bit. Is this as simple as changing my clock from a 110mph clock dial to a 90mph one which would get the speed somewhat more accurate? My main worry is that the miles also seem to be clocking up quicker than they should. I just checked and my mile clock is counting roughly 1.15 miles per actual mile of driving.

Is this to be expected from this sort of change and what are my options? My current thought is that I will have to by a full new Speedo that was originally made for this ratio setup.


Joe C

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12166 Posts
Member #: 565
Carlos Fandango

Burnham-on-Crouch, Essex

clocks ave a TPM figure prionted on them ( they are not all the same) and there are different speedo drives, best thing is to use the guessworks site to work out what needs changing.

http://www.guess-works.com/Tech/speedo.htm

http://www.guess-works.com/Tech/ratio.htm

On 28th Aug, 2011 Kean said:
At the risk of being sigged...

Joe, do you have a photo of your tool?



http://www.turbominis.co.uk/forums/index.p...9064&lastpost=1

https://joe1977.imgbb.com/



Jack2eaton

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75 Posts
Member #: 9772
Advanced Member

Sheffield

Thanks Joe

Thatís answers thatís exactly what I needed.

Home > Help Needed / General Tech Chat > Final drive/speedo options
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