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Thread: Diff & Gearbox Ratio, MPG and Tyre size calculators

  1. #1
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    Default Diff & Gearbox Ratio, MPG and Tyre size calculators

    Diff
    Quote Originally Posted by eamo View Post
    Juust enter diff ratio, wheel size and gearbox rattio

    http://www.diffsonline.com/techinfo/...Calculator.xls
    MPG
    Quote Originally Posted by seanmul View Post
    http://www.tvr-webmart.co.uk/tvr_info_mpg.asp

    any chance the powerful people will lock and sticky this please???
    Tire
    Quote Originally Posted by Torq View Post
    Hi Guys,
    found this calculator for tyre fitment. Handy for fitting bigger alloys and keeping your speedometer as accurate as possible.

    Torq
    http://www.1010tires.com/tiresizecalculator.asp - allows you to compare standard size tire to up to 4 other tire sizes.
    http://www.willtheyfit.com - Wheel Fitment, Tyre Stretch, Rolling Radius and Speedometer Error Calculator - also gives Diameter, Poke, Speedo error, Speed reading, Ride height gain, Arch gap loss difference
    http://www.carbibles.com/tyre_bible_pg4.html - This is something like a tire/wheel bible, lots of info!
    Useful diff/gearbox ratios link and speed calculator
    Quote Originally Posted by liam012 View Post
    this came up in another thread but is worth a looky if you didn't see it....
    http://www.behindmatrix.com/e30/foto...023/f00023.htm

    also if you have these:
    320i - 3.72, 2.02, 1.32, 1.00, 0.81 and 3.45 reverse
    325i - 3.83, 2.20, 1.40, 1.00, 0.81 and 3.46 reverse
    Sport - 3.35, 2.03, 1.36, 1.00, 0.81 and 3.20 reverse.

    you can use this:
    http://www.unixnerd.demon.co.uk/revs.html
    Quote Originally Posted by DaveM-sport View Post
    http://vlsicad.ucsd.edu/~sharma/Potpourri/perf_est.html

    Found this calculator for comparing performance with different gear ratios and diff ratios...

    The detail you can add to generate a result is brilliant
    Original threads:
    Diff thread
    MPG thread
    Tyre thread
    Gearbox speed thread
    Last edited by Jozi; 04-06-2014 at 12:13 PM.

  2. #2
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    Default

    Added another handy tire size calculator

  3. #3
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    Default

    Added "http://www.willtheyfit.com" a tire size comparison site

  4. #4
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    Default

    Added another tire related link, this has to be some sort of bible for wheels/tires, lots of info and sciency stuff! http://www.carbibles.com/tyre_bible_pg4.html

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