3.1– iRating
iRacing has developed a rating system called iRating which tracks how you perform
against other drivers. iRating is a “zero sum” system which means for every value
someone gains, someone else has to lose the same amount. iRating is used to divide each
race into different “splits” of difficulty, represented by the “Strength of Field” box in the
results page. Splits are determined by the iRating of every driver signed up for the race. If
there are 100 drivers registered with ten cars in each race, the highest ten drivers will be
in the first race, and the lowest ten rated drivers will be in the last race. In theory, the
more drivers registered for a race, the more equal each split will be in terms of iRating
based skill because each race will have closely rated drivers grouped together.
As a rookie, your iRating will not be visible; however it is always being calculated.
iRating starts out at 1600, and will increase or decrease even though it can’t be seen yet.
Once you receive your D license, your iRating will become visible, and you will be able
to see how it changes after each race on the results page. In general, finishing in the top
half of the race will result in an increase in iRating and a finish in the bottom half will
result in a decrease. The higher the Strength of Field, the more iRating you will gain for a
better finish.
It also divides racers into one of ten divisions for each series (there are really 11, but the
last one is a rookie only series, and rookies can’t race in any of the other division). This
will be explained in section 3.4.
The car numbers in each race are determined by iRating. The highest rated driver will
have the #1, the lowest rated driver will have the highest number (depends on how many
people are in the race as to which number that is). In general, your car number is a
reference to your expected finishing position in the race. Finishing way ahead or below
your car number will have a bigger impact on your iRating after the race. If the #1 car
finished last in a race, they can expect to lose a lot of iRating. If the lowest rated car won
the race, they can expect to gain a lot of iRating. A good rule of thumb: finishing in the
top half of a race will result in an iRating gain, finishing in the bottom half will result in a
loss of iRating.
The Strength of Field also plays a role in how much iRating can be gained or lost. If a
high rated driver finishes poorly in a low rated race (loses to people with much lower
iRating), they can expect to lose more than a low rated driver who finishes poorly in a
high rated race. This also works the other way. If a low rated driver finishes very well in a high rated race, they will gain more iRating than a high rated driver finishing in well in the same race. This is because the lower rated driver has exceeded the game’s
expectations and finished above where the rating system thought they should. The high
rated driver did what was expected of them and isn’t rewarded as much.