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Ratios, Final Drives and tyre sizes


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#16 Jammy

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Posted 26 May 2007 - 06:32 PM

If you've changed to a Metro engine then it likely that the speedo drive will be wrong which will cause your speedo to read under/over.

#17 Guess-Works.com

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Posted 11 January 2008 - 09:48 AM

Finally.... for all you mozilla, opera, safari and even AOL.....

The ratio graph now works for all....

http://www.guess-wor...arbox/ratio.htm

or

http://www.guesswork...arbox/ratio.htm

Edited by GuessWorks, 11 January 2008 - 09:57 AM.


#18 Guess-Works.com

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Posted 13 February 2008 - 07:49 AM

Now does 5 speed gearboxes...

#19 Boomboy77

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Posted 05 June 2008 - 12:21 PM

Thats very cool, but just frightened myself at how inaccurate my speedo is (reads under a little) 7300 in 4th, 3.44 diff and 175/50/13 wheels.
No wonder the guy in the celica was looking a bit shocked!!! LMAO

#20 zap

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Posted 18 November 2008 - 05:56 PM

HI there wondering if you could help me.

I have put the information on the site, but i dont what my pinion gear size is for speedo.

I have a mini side walk with 2.76 f/d, engine 1275, and 13 inch wheels

#21 Sam Walters

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Posted 19 November 2008 - 07:48 AM

someone will have to confirm this but.

7/16 i belive is what your after.

Depends on your box and your clocks though.

im just assumeing post 84 stuff.

#22 zap

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Posted 19 November 2008 - 07:19 PM

someone will have to confirm this but.

7/16 i belive is what your after.

Depends on your box and your clocks though.

im just assumeing post 84 stuff.



Cheers for that, but i don't think it is right because it says at 6000rmp i will be doing 129mph which i no mine reaches a 100mhp max

#23 Sam Walters

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Posted 19 November 2008 - 08:30 PM

100mph at what rpm? 6000? you dont have a 2.76 final drive, id say a 3.44

Edited by flyingears2002, 19 November 2008 - 08:31 PM.


#24 zap

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Posted 20 November 2008 - 09:58 PM

100mph at what rpm? 6000? you dont have a 2.76 final drive, id say a 3.44



Well it cant be because its the standered mini injection gear box with 2.76 final drive, thats why i am putting in a mg metro gear box with 3.44 final drive.

#25 Sam Walters

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Posted 21 November 2008 - 07:29 AM

4600ish revs then?

#26 zap

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Posted 08 December 2008 - 10:32 PM

4600ish revs then?


god knows i have not got a rev counter

#27 doughbot

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Posted 22 February 2009 - 04:42 PM

yet again

Fantastic thanks GW




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