How To Increase Horsepower In Subaru Outback Easily? (Solved)

Has your Subaru Outback recently become less powerful? It could be because your automobile is old or hasn’t been maintained in a long time or because you wish to speed up your cherished vehicle. So, how to increase horsepower in Subaru Outback?

The engine develops more power as you add more fuel and air. However, the proportions of fuel and air must be correct. The engine’s power will be increased by increasing the amount of air intake.

The amount of air intake in a naturally aspirated engine is permanently restricted. People frequently intervene to increase the first air intake system while increasing the car’s capacity. The challenge of increasing fuel is pretty straightforward when increasing the amount of oxygen entering the combustion chamber.

Refer to this post to learn about easy techniques to boost horsepower in your Subaru Outback.

How to increase horsepower in Subaru Outback?

To expand the capability of the car, we must properly maintain it. Upgrade or replace obsolete parts to boost the vehicle’s horsepower. We’ve included a few relevant references below.

1. Change the car air filter

Increasing horsepower is as simple as changing the air filter on your car. The structure of drop-in air filters differs from that of the air filter that the manufacturer installs in the vehicle.

Internal combustion engines require clean intake air for optimal performance. Modern engines are meticulously constructed. As a result, it is necessary to thoroughly clean the air entering the combustion chamber. 

If pollutants in the air, such as soot and dust, enter the combustion chamber under high pressure, they will damage the piston and cylinder surfaces, producing surface pitting and lowering the piston’s service life.

Simultaneously, the function of the electronic airflow sensor elements situated between the air intake and the combustion chamber may be compromised.

2. Upgrading the cold air intake

Ram-air is one of the most often used automotive performance tuning techniques today. As a result, the horsepower capacity can be increased from 5 to 30.

The intake manifold will be changed when ram-air is upgraded to make use of the air pressure created when the vehicle is moving to raise the static air pressure inside the intake manifold. As a result, a higher flow of air may be introduced into the cylinder combustion chamber, improving engine output.

In a word, ram-air will increase the diameter of the intake manifold to reduce the intake air velocity. As the speed decreases, the dynamic pressure decreases, and the static pressure increases. Air carries oxygen and oxygen is required for combustion to take place. The more oxygen loaded, the more abundant the combustion mixture will be, and the more powerful the engine will be.

There are two techniques to improve ram-air at the moment: Cold Air Intake and Short Ram Intake.

The Cold Air Intake (CAI) is a type of air intake that takes cold air from outside the engine compartment and funnels it into the engine compartment through the lower bumper. Cold air from the outside has the advantage of being denser. The combustion process inside the engine is improved as a result, and piston thrust increases.

The Cold Air Intake, on the other hand, cannot be used with the original Subaru Outback air filter system. As a result, the pipe connecting the air intake and the engine must be redesigned. This style of air intake pipe is quite massive, long, and has a lot of bends, thus it takes up a lot of space in the engine compartment.

3. Upgrading Short Ram Intake

Short Ram Intake (SRI) is a type of air intake for short intakes. When using SRI, the intake manifold must be rebuilt, the same as when using CAI. SRI, on the other hand, just requires a big and short intake tube, taking up less room than CAI.

The SRI is mounted near the top of the car, right below the hood. When driving on flooded roads, you won’t have to worry about your automobile being hit by water. SRI, on the other hand, generates more noise than CAI. Both SRI and CAI assist the engine in receiving more oxygen than the vehicle’s original air filter and intake manifold. CAI outperforms SRI in terms of performance.

Because the chilly air below the engine compartment is always higher in oxygen than the hot air above it.

4. Upgrade the exhaust

Upgrading the exhaust system is another option to boost horsepower in a Subaru Outback. Because charging a lot leads to a lot of discharge and discharging a lot leads to a lot of charging, the charging capacity will improve. 

The exhaust pipe can be upgraded to allow exhaust gases from the engine to leave more easily and quickly. The engine does not have to expend as much energy to push the exhaust out as it would normally.

5. Camshaft upgrade

The intake and exhaust valves on the cylinder are controlled by the camshaft. The opening angle and time of the intake and exhaust valves will be increased by upgrading the camshaft. The higher and longer the intake valve opens, the more gas is pulled into the combustion chamber. The ECU detects this via the sensor and adjusts the fuel increase, resulting in increased engine power.

When upgrading the camshaft, horsepower might range from 17 to 30. Furthermore, upgrading the camshaft aids in increasing the rpm limit.

6. Torque damper upgrade

The chassis is attached to the car engine. However, to assist the automobile run more smoothly by reducing engine vibration transferred to the chassis, the manufacturer will install a rubber tripod between the engine and the chassis.

This tripod rubber has a gentle texture that provides a comfortable ride. However, because it is too soft, the automobile will twist more if it accelerates unexpectedly.

A torque damper connects the engine to the chassis and acts as a shock absorber. More torque dampers will aid in the engine’s acceleration.

Read more: Subaru Outback Roof Rack Problems And How To Fix It!

7. Replace any worn-out components

The parts in the engine become more or less abraded over a long period of usage, which is one of the causes of the engine’s loss of power.

Cylinders are scraped, pistons are worn, and the transmission is inert, for example, resulting in a major loss of engine power.

As a result, if possible, these parts should be replaced after extended use to renew the engine and boost power. Furthermore, you should remove any unneeded equipment or things from the car and discard any old parts that have been replaced.

This contributes to reducing the vehicle’s weight, making the car space more spacious, increasing the car’s performance, and helping to accelerate quickly.

8. Replace clutch and flywheel

The clutch and flywheel are two elements positioned between the engine and transmission that keep the engine and transmission speed synchronized. Car manufacturers frequently prioritize smoothness and comfort when considering clutch and flywheel design. As a result of the increased engine power, the clutch and flywheel will be readily overloaded. If you’ve upgraded the engine in your automobile, you’ll also need to upgrade the clutch and flywheel.

Friction limitation is referred to as clamping force. If the clutch clamping force is 150 horsepower, the engine power should be less (less than 150 hp). The clutch will slip if the engine power surpasses 150 horsepower. When this happens, the clutch and flywheel rub against each other, causing both parts to wear down more quickly, and the automobile does not accelerate as efficiently as it should.

Final thoughts

We’ve detailed the methods for increasing horsepower in the Subaru Outback above. However, we still advise that you seek thorough guidance on the best fit for your Subaru Outback from trusted sources. I hope the previous essay provided readers with a wealth of useful information. If you have any questions, please contact us for a thorough response!

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