So many people attend rally’s not everyone attend to do some racing sometimes it is just amazing and entertaining to watch but have you ever given much thought about the cars and what makes them perform the way they actually do because I know I rarely did until I did some research and the truth is this is quite a difficult sport especially when it comes to troubleshooting issues with the car so I will give you a bit more information about one problem which is misfiring or well lagging.
Using anti-lag systems is the best way to ensure the best performance but what is an anti-lag system you might be asking.
An anti-lag system or misfiring system is one of the system used on turbocharged engines this system reduces turbo lag on race cars.
So how does this actually work?
Well if you do not know this already basically all turbochargers in the world have an issue which prevents them from providing their maximum amount of pressure at lower revs.
So this means that the lag you hear is actually just a delay in time that is needed for the turbocharger to reach its full potential when going from a high to low rotational speed.
When you run on low RPM’s the turbocharger will rarely provide a boost and this is a problem as most rally cars utilize turbocharging, there are various methods in which you could decrease the lag that has been used over the years.
And like you might have noticed these technologies might be quite noisy this is why they were almost only fitted to rally cars. The dump valves was one of the first implemented but they were heard as soon as the driver would take his foot of the accelerator.
The blow off valves which would help to evacuate some of the pressurized air that is coming out of the turbo this is when the manifold is closed this in turn allows the turbine not to lose any momentum. Due to the oversized turbines found on race cars they do suffer from large amounts of turbo lags which makes the blow off valve very insufficient to help with this problem
So this will be where the anti-lag systems are needed because as soon as the driver’s foot is lifted from the gas, the ignition timing is retarded and this in turn causes the air and fuel intake to be enriched.
There are two versions.
The air inlet can be kept slightly open or you can add an extra air injector which will then bypass the air manifold.
Either of these methods will insure that the fuel and air mixture keeps getting inside the cylinders of the engine even when the driver does not use his accelerator pedal. So when the spark plugs fire for the very first time in a cycle the valve of the exhaust will just be opening due to a delay cause in the ignition. When in contact with a high temperature the unburned air/fuel will actually explode in the exhaust tubes. This little explosion that takes place actually will keep the turbo spinning which then provides an adequate amount of pressure even when the accelerator is no longer used.