The muscle cars of yesteryear were and remain amazing cars. Pop the hood and most are equipped with rather larger carburetors. Do the same with a newer car and you wont see a carb because they are now fuel injected.
There is a lot of confusion about the difference between carburetors and fuel injection systems. Stepping back from the debate, we can see the difference comes down to how the systems put fuel into the engine cylinders. With carburetors, air and fuel is sucked in. With fuel injection systems, it is injected in. This may sound like two sides of the same coin, but it is a critical difference.
The issue is control. With carburetors, you had much less control over the fuel and air mixture because the sucking effect was difficult to control. In contrast, the fuel injection method allowed for the input of a precise amount of fuel to the cylinder. This is particularly true with electronic fuel injection systems where things can be controlled down to miniscule levels.
The control found with fuel injection resulted in two major advantages. The first was simply an improvement of gas mileage. With more precise control came more precise measurements of fuel that cut out waste. Put another way, the perfect amount of fuel was used, which meant there was little or no excessive waste.
The second thing that came from fuel injection was performance. The more the aspects of the combustion process could be controlled, the more the performance of the car could be changed. This is particularly true with modern cars and their central processing units. Whereas car lovers would jump under the hood in the past to tweak the performance of their cars in the past, these days they pop in a superchip program through a laptop and crank up the measurable factors to increase performance. It constitutes a major change in how things are done.
There are many different variations to fuel injection systems, but two basic differences can be broken down by the port approach. The first is a single port injection system. The fuel is injected through a main port and then sucked into the various cylinders much like would work with a carburetor. This is known as the "American approach" because most American manufacturers use it.
The secondary approach is to create fuel injection into multiple ports. As you can probably guess, this simply means there is an individual injector for each cylinder. The approach is generally considered the best because it provides greater control since the individual fuel input to cylinders can be manipulated and adjusted on the fly using electronic systems.
The evolution of combustion engines from carburetors to electronic fuel injection systems has been an important one. With more efficient running, the cars of today can get better gas mileage and still produce quality performance.
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