The turbocharger has been present at the rally world for a couple of decades and it has become a very useful element for the teams. It’s been years of experience and investigation in the delicate art of gas and air recycling, which are directed towards the new engine after they are expelled, with the purpose of getting a better performance and higher results.
Basically, the turbocharger is a system that reuses the exhaust fumes. These are put into a turbine within the turbo, which spins at a speed of aproximately 150.000 revoutions per minute (rpm). In places like Mexico, it even goes little faster, since the air is warmer and there is less oxygen. In other countries, like Sweden, it works at a slower speed, with a colder and more dense air. This turbine is connected to a compressor that results in a greater boost. At the same time, this results in more power when the whole process in done.
At the World Rally Championship, all the teams must use the same turbo model, made by the American brand Garrett, with the same 33 mm pop-off valve, which control the air volume allowed by the system. M-Sport had the possibility of making the turbo spin faster, but it doesn’t because of a “drowning” effect.
As we have seen along our championship, there are drivers who prefer this system for competition, either because of the car’s behaviour on certain roads or simply because the performance of some models improve. For example, Cristóbal Ibarra, driver at the Renault Team, races in a Clio IV Turbo and has declared at several occasions that he will keep working on this car’s development, even having an option to compete in the aspired version of the same model and brand.
Remember there are nine days left before the Curicó trophy start, which is the fifth round of RallyMobil Championship. The land of Francisco “Chaleco” López will be the scene of a new challenge for the teams, which give it their all every month at the roads of our country.