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Gear Ratio Calculation Program

Printed From: Bavarian-Board.co.uk - BMW Owners Discussion Forum
Category: Technical & Model Specific Forums
Forum Name: BMW ///M Power
Forum Discription: Ask your BMW M Power Technical Questions here (M1, M2 hybrids, M3, M5 & M6)
URL: http://www.bavarian-board.co.uk/forum_posts.asp?TID=13671
Printed Date: 18-May-2024 at 16:33


Topic: Gear Ratio Calculation Program
Posted By: 2002SportEvo
Subject: Gear Ratio Calculation Program
Date Posted: 21-January-2005 at 04:27

Found this useful gear ratio calculator - some of you might have seen it or something similar before.

http://locost7.info/gearcalc.php - http://locost7.info/gearcalc.php

  • Calculates maximum speed at "redline" in each gear and speed per 1000 RPM
  • Chart of RPM's for each gear at 10 Km/h (or 5 Mph) intervals
  • Calculates rev drop and actual RPM value at each gear change
  • Calculations performed in Metric or Imperial units
  • The chosen units are maintained between runs
  • Pre-set gear sets or manual input (additional gear sets added)
  • Comparative gear ratios displayed graphically
  • Compound ratios calculated and displayed for each gear
  • Results can be saved to a text file or printed
  • If known, you can enter the RPM at which peak power is generated and you can then compare shift points at max RPM and Peak Power (leave blank if not known)
  • Defaults to last entered values at program start

    • Handy piece of software

    I have raised the RPM on my 2002 to 7800RPM - with 205/50/15 A032's, the top speed is now calculated at 144 MPH (3.64 diff)

    For those interested, E30 M3 ratios are as follows:

    1st 3.717

    2nd 2.404

    3rd 1.766

    4th 1.264

    5th 1.000



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    http://www.bmwccscotland.co.uk/cars/2002/evo.html" - 2002 SportEvo     
    http://www.freesmileys.org">


    Replies:
    Posted By: UweM3
    Date Posted: 21-January-2005 at 15:38
    cool Programm, thanks for sharing

    -------------
    E61 520d, slow and buzzy but my wallet likes the mpg.....

    Posted By: 2002SportEvo
    Date Posted: 24-January-2005 at 02:59
    It's handy wee program for checking out other diff ratios, tyre sizes etc...

    -------------
    http://www.bmwccscotland.co.uk/cars/2002/evo.html" - 2002 SportEvo     
    http://www.freesmileys.org">


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