Tuning a car

There are many ways about how to tune a car.

An Engine’s Performance Curve

First thing you must understand is that your engine does not care if its not running right or well tuned at all, all it wants to do is make torque. The trick then is to figure out how to get your engine to produce that torque where you want it to in the RPM band you are looking for. This can be done with many different factors, but when talking about engine tuning one of the most important things is boost pressure (and air/fuel ratios).

Boost pressure allows an increase of mass flow into and out of the combustion chambers. With more air coming in and less coming out of the exhaust, its clear that you would have a lot of area under this curve on a dyno graph if everything was tuned properly. Just remember there is no point at which having boost will hurt your car or lower output and power and ruin your day (unless you run too much boost and over-rev your engine).

Enter the Dyno

The next step is finding a dyno. A dyno will allow you to measure your engines performance and help identify any areas that need improvement. You put your car on the dyno, hook up some sensors, and it will tell you things like horsepower, torque, and air/fuel ratios. With this information in hand, you can start making adjustments to different areas of your tune to try and get that perfect curve.

One common adjustment that is made is adjusting the fuel maps. These maps control how much fuel is delivered to each cylinder at a given point in time. richening or leaning out the air fuel mixture can have a dramatic effect on the power and torque your engine is making.


Another common adjustment is ignition timing. This is the point at which the spark plug fires in the combustion chamber and starts the combustion process. Advancing or retarding the ignition timing can have a large impact on power, especially in high-performance engines.

Tips and method

Well before you get your hands dirty with anything, it is good to understand some basics about engines and how different parts of an engine work together. In order from simple concepts that can be explained in line-art style diagrams or single pictures, to complex topics which require several pictures to illustrate their multiple dimensions.

Introductory Concepts

The basic concept behind tuned engines is pretty simple extract more power out of the same hardware, within safe limits of course! For example, imagine having a normally aspirated 2.0 liter 4 cylinder engine capable of producing 150 horsepower at 6000 RPMs. A tuner could theoretically increase the engine’s power to, let’s say, 175 horsepower by modifying the engine hardware or software.

This would be done by, for example, increasing the size of the intake and exhaust valves, modifying the camshaft timing, or recalibrating the ECU. Obviously there is much more that goes into a tuned engine than just these examples, but this gives you a general idea of what is involved.

Physical limitation

One thing to keep in mind when tuning engines is that there are various physical limitations that need to be considered. Increasing the power output of an engine too much can lead to problems like detonation (also called “knocking”), pre-ignition, and over-heating. These problems can cause serious damage to the engine, so it is important to stay within safe limits when modifying engines.

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Choose the correct parts

Once you have selected the parts you want to use, it is important to make sure they are compatible with each other. For example, if you are using an aftermarket intake manifold, make sure the exhaust system is compatible with the intake manifold. Likewise, if you are using an aftermarket exhaust system, make sure the intake manifold is compatible with the exhaust system.

It is also important to make sure that the parts you select are appropriate for your car’s application. For example, if you have a Corvette, you can’t go out and buy a high-flow 200 cell racing catalytic converter for it. A high-flow racing catalytic converter is designed to meet the EPA requirements mandated by the Clean Air Act which took effect in 1971. Obviously, this was back before cars had performance mufflers built into them.


Now let’s take a look at what makes up the engine itself. This section will be divided up into 3 sub-sections consisting of Intake, Compression, and Exhaust.


The goal when modifying an intake system is to improve the airflow characteristics of the air/fuel mixture entering your engine’s cylinders. There are two general types of intakes, cold air intakes & ram air intakes. A cold air intake doesn’t have anything to do with whether it gets its air from outside or not.

Rather, a cold air intake refers to how it routes fresh air into the engine, through a mass airflow sensor that is typically located away from hot surfaces near where fresh incoming air enters the vehicle’s body (this can also lead to more power). A ram air intake does utilize the hot air intake scoops typically found on vehicles with large, aftermarket hood scoops.

Ram Air Intake

The most important thing to know about intakes is that there are different types for different applications. For example, if you have a naturally aspirated car, don’t go out and buy an intake designed for a supercharged or turbocharged vehicle. The reason for this is because these particular intakes will actually hurt your performance instead of helping it due to the fact that they were designed for more powerful engines than yours.

Frequently Asked Questions

Is it easy to tune a car?

Yes, it is easy to tune a car and you do not need any professional nut if you do not know about machinery then surely visit the professional.

Is it costly to tune car?

No it is not. It depends on the fault.