Fuel Injection Vs. Carburetor
New Vs. Old
Carburetors may be the older performance boosting system, but they are definitely not dead yet. There are still a lot of cars these days that make use of carburetors. Carb’s main function is to mix the right amount of gasoline with air to keep the engine working properly.It is very important to have a balanced mix of fuel and air for the engine to be running smoothly. Less fuel – more air, means the engine will run lean. More fuel and less air is equivalent to the engine running very poorly.
Because carbs are older technology, they are simpler in terms of operations and structure. They are also a lot cheaper compared to other performance system such as turbochargers and superchargers.
Fuel injection or EFI on the other hand is becoming universal or a standard among newer and more modern cars. One of the obvious differences between a carb and EFI is that the former operates mechanically and the latter is an electro-mechanical device.
Because of the complexity in operations with electronic devices, EFI tends to give more accurate results than carb. However, this does not necessary make EFI the better performance system. Let’s take a look at which performance system makes more power.
Which makes more power–carburetors or EFI?
Butch Bass: A properly sized manifold and carb can make as much absolute power as EFI. Although EFI tends to produce a broader torque curve, ultimate horsepower is simply a case of flow and distribution.
Jim McFarland: If you boil everything down to combustion efficiency, ultimately full-sequential port-EFI systems will make the most power. Carbs are not good providers of mixture quality when tuning one cylinder at a time.
Warren Johnson: Properly tuned, carburetors make more peak power than EFI in a Pro Stock engine. A carb’s pressure differential atomizes the gas a lot better than spraying fuel through an orifice. But EFI has a broader powerband and superior cylinder-to-cylinder fuel distribution. The 1,100- to 1,300-cfm dual carbs are good only over a narrow range, about 1,500 rpm at most. EFI performs well over 2,000 rpm or more. On average, if optimized, both systems perform about the same as far as how fast you get down the track. However, the EFI system is much easier to tune than a carburetor.
Read more at Carb vs. Injection:Are Carburetors Dead?
And the best among the two performance system/kit goes to…it will always be on a case to case basis. Both have their pros and cons. EFI are more fuel efficient than carb. Carbs on the other hand are more durable and a lot cheaper. So it would still depend on the car you have.