# Best answer: How much air does an engine need?

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On a four stroke motor (most cars), a cylinder only pulls in air every other rotation. So, at 5,000 RPMs, it’ll pull in air 2500 times. If you had the above engine running at full throttle at 5000 RPMs, it’ll be pulling in 2500 * 21.2 * 6 = 318,000 cubic inches, or 184 cubic feet of air per minute (CFM).

## How much air does a car engine consume?

The large number of combustion engines makes them the consumers of the largest volumes of air. All engines operating during one day consume about 3.1E+12 litres of air or about 175 times the daily air requirements for breathing by Montréal’s 1.8+ million people.

## Is too much air bad for an engine?

In regards to your original question (can too much air flow be bad for an engine): The answer is “No, up to a point.” If you increase the air flow into your engine, your engine computer will sense the increased amount of air and add more fuel to keep the mixture at the optimum ratio of fuel to air.

## How much oxygen does an engine use?

To begin with the air around us is roughly about 21% oxygen. Almost all the rest is nitrogen, which is inert when it runs through the engine. The oxygen controls how much fuel an engine can burn. The ratio of gas to oxygen is about 1:14 for each gram of gasoline that burns, the engine needs about 14 grams of oxygen.

## How do you calculate engine airflow?

Multiply the engine’s highest expected revolutions per minute (RPMs) by the displacement of the engine, as measured in cubic inches. For example, if the engine is not expected to reach speeds in excess of 6,000 RPMs, and if the size of the engine is 350 cubic inches, then 6,000 x 350 = 2,100,000.

## How much air does a 2 Litre engine use?

An efficient 2L engine can idle at about 1L (fuel) per hour, maybe even a bit better if it’s very efficient. That’s about 750 grams fuel per hour, or 12.5 grams per minute. So times this by about 15 (typical air to fuel mass ratio) and you get about 190 grams of air per minute.

## How much CFM does my car need?

The formula for calculating how much CFM (cubic feet per minute) your engine requires is: CFM = Cubic Inches x RPM x Volumetric Efficiency ÷ 3456. Any ordinary stock engine will have a volumetric efficiency of about 80%.

## Is it better to run lean or rich?

Running lean can give you more power but to lean will blow your engine. Running too rich can also hurt your motor. Think of it when you are mixing gas for your weed wacker. It is always safe to add a little more oil than not enough to the mixture.

## How do you force air into an engine?

Installing an intake manifold with taller and longer runners to help ram more air into the cylinders. Installing a larger throttle body or carburetor (or multiple carburetors) that can flow more CFM (cubic feet per minute). Adding an air scoop or cold air intake system to help route cooler denser air into the engine.

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## Can air intake cause problems?

Like a dirty air filter, a dirty cold air intake, can cause performance issues in your vehicle’s engine. Common problems include a decrease in gas mileage, hesitation when shifting gears, slugging acceleration and even a dirtier air filter.

## Can an engine run on liquid oxygen?

Liquid oxygen and fuel would be a lot of energy in a very small volume, so that would be way too hot and violent for any engine to withstand. But you could run it like they do in some submarines (I think), capture a lot of the exhaust gas, cool it, add some oxygen from the tank and pipe it into the engine intake.