Vehicle modeling:

Modeling the Global Mazda MX-5 Cup car

Modeling the Global Mazda MX-5 Cup car

Most racing games and racing simulations have progressed to the point where race cars look real enough. The question then becomes, do they offer the experience of actual racing when the driver gets behind the wheel? Realistic vehicle dynamics begin with accurate data. That is why works closely with major auto manufacturers and race car constructors to gather exact masses and dimensions for real vehicle components, whether directly from CAD data, via three-dimensional laser scanning, or even by physically disassembling a particular vehicle in order to weigh and measure individual components.


Real world to in-game - this is how we build our cars.

Real world to in-game – this is how we build our cars.


A real race car is not just a collection of high-performance parts any more than an intense racing simulation experience is derived from a collection of data points. Both elements are highly active and incredibly dynamic. Buoyed by iRacing’s proprietary physics engine and tire modeling systems, these individual components combine and morph to create something that is no longer a mere virtual representation of a car. Instead, iRacing feels as real as the experience possibly can without burning actual race fuel.



Physics engine:

Dave Kaemmer takes measurements of a racing tire for research purposes

iRacing co-founder Dave Kaemmer testing and taking measurements of tires to be incorporated into iRacing.

A critical difference between past products and the accuracy achieved by iRacing is the level of the sophistication within its physics engine.

A physics engine is a complex system of high-speed mathematical functions that replicate and deliver dynamic forces using data-driven calculations. This leads to a series of instantaneous dynamic actions and reactions. Consequently, iRacing’s virtual world leverages the same physical dynamics and that drivers experience in the real world.

With more than twenty successful racing simulation releases to its credit, iRacing’s Dave Kaemmer and his team are among the world’s leading experts in the mapping of multi-body systems, and the direct calculation of forces and consequent dynamic effects on motion. Kaemmer’s relentless search for accuracy has led to the creation of iRacing’s proprietary tire model. This replicates tire forces over a range of speeds and loads, adding an important dimension to the accuracy of iRacing.