New Car Rally Timing Tables Available

Recently I was getting some information together to assist a fellow prepare for a rally and I thought that a set of timing tables would be very useful.  I looked at the timing tables that were available in rally books that I had and I thought that more comprehensive tables would be needed.  As a result I prepared my own rally timing tables that covered a large range of speeds and provided the detail needed for checking the time at frequent intervals.  The result was a set of rally timing tables which I assembled into a book that hopefully would be useful during a car rally.

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I Prepared This Book Of Rally Timing Tables

Due to the specific nature of the initial rally that I had in mind, I used a distance basis of kilometers and the timing tables are presented primarily in minutes and sections with the total duration of any one speed being up to 2 hours.

A typical page from the rally timing tables is shown below.

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Typical Page From The Rally Timing Tables Book

This set of timing tables covers a range of speeds from 10 to 100 kilometers per hour in intervals of 1 kilometer per hour.  The sample page is for a target average speed of 44 kilometers per hour.  The pages are numbered in the bottom right corner by the speed covered and presented in increasing order to make changing from one speed to another as simple as possible.

The reference distances are presented in every tenth of a kilometer.  This will allow compatibility with standard automobile manufacturer odometers and yet provide for frequent checking if the navigator is able to use a calibratable rally odometer.  For example if the navigator wants to know the perfect elapsed travel time for a distance of 6.40 kilometers, the navigator would first look at the left-most column to find the row for 6 kilometers.  The navigator would then move across to the column under 0.4 tenths of a kilometer and see that the perfect time is 8 minutes 43.6 seconds.

The rows are presented with alternating grey/white shading to make the tracking across the page easy, but still clearly readable.  The right-most column is for durations/distances that are over one hour.  For distances shown in the right-most column, the navigator should add one hour to the time shown in the table.  For example, if the distance of interest was 70.80 kilometers, then the navigator would look down the right-most column for 70, then follow across the table to the column for 0.8 which would result in a perfect time of one hour, 36 minutes, and 32.7 seconds.

For speeds up to 57 kilometers per hour the timing information is presented on one page for each speed.  For speeds from 58 to 100 kilometers per hour the rally timing tables are presented on two pages for those speeds.  This way I did not have to reduce the print size of the tables.  It does increase the number of pages in the book, but I think that it is more user-friendly.  By the way, the speed titles in this example are for kilometers per hour, but the title and tables can easily be made available for miles per hour as well.

In the upper right hand corner it can be seen that the odometer factor used for this set of tables was 1.0000.  In other words, the odometer is in perfect calibration with the official rally distance.  This may not necessarily be the case, especially in rallies where special rally odometers are not permitted.  Rather than trying to produce a vast number of tables that could be used for a number of odometer factors, I decided to set the tables up so that I can easily change the entire set of tables for any odometer factor.  This approach combined with internet connections and the widespread availability of print shops will allow for a set a custom rally timing tables to be sent anywhere in the world in a few minutes.  For example, if a navigator ran the calibration distance a few hours before the rally or the day before which is common in many rallies, then the navigator could contact me with the Odometer Factor that is needed for that rally.  I could adjust the rally timing tables and email the custom tables to a print shop near the rally for printing and binding in time for the rally.  It is probable that a complete custom set of rally timing tables for a specific rally and car could be fully prepared in a couple of hours.

In the upper left side of the table, I have also included an indicated speed based on the odometer factor.  This will allow the navigator to advise the driver of the indicated speed that the driver should aim for on the car’s speedometer in order to maintain the target speed required by the car rally route instructions.

The binding that I have used for the book of rally timing tables is the spiral type so that the book can be fully folded over.  This will allow the navigator to place the book on a flat surface for easy reference as the car travels along the rally course.

I have decided to make this this book of rally timing tables available for $25, plus shipping and handling.  If you are interested in getting a copy of these rally timing tables, then send me an email message at the following address:   shanna12 at comcast dot net

If you have any suggestions for improvements to these tables or if you have some other specific needs for a car rally let me know.

My car rally timing tables have been updated.  Refer to a post on this website dated December 22, 2013.

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6 Responses to New Car Rally Timing Tables Available

  1. Clarence Westberg says:

    Larry Reid has 1:22 for 1.0 @ 44, you sample appears to be 1:21. @ 2.0 2:43 vs 2:44

    • I am going to check for rounding/truncation issues in the seconds column for the even kilometers.

      Steve

    • Hi Clarence,
      Thanks for your comment. It was a question of the truncation in that column only which has been resolved.
      The issue of truncation and rounding is an important issue to consider and your comment reminded me of the reason that I have included the tenths of a second in my rally timing tables. It seems that the values in the Larry Reid tables that you referenced are rounded values, while my values are rounded to the nearest tenth of a second. The actual time for 2.0 km at 44 km/h is 2:43.636 which I have rounded to 2:43.6 seconds in my rally timing tables. As you pointed out, the Larry Reid tables have a time of 2:44, which appears to be rounded to the nearest second.
      As you know rally timing at the timing line is by tripping the clock at the timing line. If a rally was timed to the whole second, then the perfect time at the timing line would show up on the timing clock as 2:43 if the distance traveled was 2.0 km because the clock would not yet have clicked over to display 2:44. If navigator was using the Larry Reid tables, then the navigator would have been aiming for a time of 2:44 or 1 second later than the perfect time as would be timed at the timing line. In fact, using the Larry Reid value, a navigator would expect to have the entire 44th second available to the rally crew which would be up to 1.4 seconds behind the perfect time. It was for these reasons that I resolved my rally timing tables to the rounded 1/10 second values, so that the navigators would know where they stood within the second.

      Steve McKelvie

  2. Andy Kowalczyk says:

    When I rallied with a stock odometer, I preferred using a Stevens Wheel because it allowed me to quickly go back and forth between official “mileage” and the uncorrected odometer reading. Have you developed a strategy to do that with tables?

    • Hi Andy,
      I have a couple of ideas that I am going to work on. For the purposes of the tabular approach, I will stay with using minutes and seconds, as that is a more complex problem to solve. Also timing in minutes and seconds is more commonly used around the world. Using decimal minutes is much more calculation-friendly, so there are more options, such as the Stevens Wheel that you mentioned. I am trying to develop rally timing tables that can be used by novices or people that have never participated in a car rally before.
      Steve McKelvie

  3. I have updated the rally timing tables. Please see my post on December 22,2013.
    Steve McKelve

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