In the United States, carburetors were the common method of fuel delivery for most US-made gasoline (petrol) engines until the late 1980s, when fuel injection became the preferred method. One of the last motorsport users of carburetors was NASCAR, which switched to electronic fuel injection after the 2011 Sprint Cup series. NASCAR still uses the four-barrel carburetor in the NASCAR Xfinity Series.
In the United States, carburetors were the common method of fuel delivery for most US-made gasoline (petrol) engines until the late 1980s when fuel injection became the preferred method. One of the last motorsport users of carburetors was NASCAR, which switched to electronic fuel injection after the 2011 Sprint Cup series. NASCAR still uses the four-barrel .carburetor in the NASCAR Xfi,nity Series.