How to Get More Power Out of a 5.7 Hemi? [10 Methods with Bonus Tips]

Better speed, acceleration, the roaring engine is a dream package for a hemi 5.7 owner. It’s not unusual for you to think like that if you possess one. But this might not be realistically possible.

how to get more power out of a 5.7 hemi

So, how to get more power out of a 5.7 hemi?

Reducing the weight of your vehicle, effective ECU, throttle body up-gradation- can increase power. You can even work separately with your exhaust system to bring more horsepower to your engine. Using filtered fuel can also offer you a powerful engine.

Along with all the possible options, we have given alternate solutions too. That’s for if you want to stay on a limited budget.

So prepare your workstation. In this article, you’ll learn how to fire up your engine.

You may also like: Best Synthetic Oil for 5.7 Hemi

How to Get More Power Out of a 5.7 Hemi? 10 Methods

Injecting more power into your 5,7 Hemi engine can be accomplished in several ways. Among them, most prominent 10 are discussed here-

Reduce The Weight of The Engine:

First requirement will be to replace the iron flywheel on the engine. Replace the heavy flywheel with a lightweight aluminum flywheel to maximize performance.

A lighter load will allow your engine to rev faster.  As a result, power will be transferred more efficiently to the back tires. It will boost the torque as well as the power output of your engine.

Modify The Drive Shaft:

Replacing the massive iron drive shaft with a lightweight aluminum one is a good idea. The engine will send more power to the rear wheels, resulting in higher torque and power.

Reset The ECU: 

The 5.7 Hemi engine is electronic and is controlled by an ECU. The electronic control unit, like all other computer systems, has inherent limitations.

By flashing the ECU, you can get rid of the limiters. Every motion of the engine is controlled by the ECU. Your car’s power output and efficiency can be increased by resetting the control unit.

Replace The Factory Air Filter:

The intake box is not required If you replace the factory air filter. Then there’s the intake box, which is an aftermarket part.

Rather, An air filter larger than the current one will be used to collect cooler air from the inner fender wells. Thereby allowing for a cooler airflow in front of the engine. When the combustion chamber is supplied with a large amount of cold air, its efficiency will increase.

Install A Throttle Body Spacer:

A throttle body spacer can help direct the airflow through the engine. With that, you will create a larger gap between throttle body and intake runners. As a result, more air will be available to the engine.

The better the combustion, the more air there is. This results in greater horsepower in the engine.

Upgrade Your Exhaust System: 

OEM parts will provide good results when replacing your factory system.

While there are various alternatives, you should choose the best one. So, get a cat-back exhaust system to replace your stock exhaust system. Also, your engine might lose power if the camshaft sensor isn’t working. In that case, replacing your camshaft sensor is a good idea.

Here are some good options for you-

Borla 140616

Borla 140616 ATAK Cat-Back Exhaust System

Product Description:

  • Brand: ‎Borla
  • Weight: ‎53 pounds
  • Model Number: ‎140616
Borla 140427 Cat-Back Exhaust System

Borla 140427 Cat-Back Exhaust System

Product Description:

  • Brand: Borla
  • Weight: 48 Pounds
  • Model Number: 140427

You want your 5.7 Hemi to growl. You can boost your performance by installing a cat-back exhaust system on your car. As a bonus, it will increase the sound of your exhaust as well.

Install a More Powerful Intercooler:

A more efficient engine has a cooler combustion chamber. Increased airflow will be directed to your engine if you install an improved intercooler. Your engine’s torque and power output will also drastically improve. In that case, fixing your radiator is a good move if it’s faulty.

It will do so by lowering the temperature of your intake air and enhancing combustion.

Your engine will run more efficiently if it has a better combustion system.

Incorporate a Meth Injection System: 

The effect of adding colder air into the system has already been seen. So, what if you put an ice-cold methanol/water mixture into your engine? 

It would significantly increase the overall performance of the engine!

Filtration System for Diesel Fuel:

High-quality gasoline improves the performance of engines.

Unfortunately, fuel is not always free of contamination. These contaminants might lower the engine’s power output and cause damage.

A fuel filtering system can help you avoid this problem. Your engine will run more smoothly and efficiently.

Invest in a Catalytic Converter Upgrade:

A catalytic converter uses a catalyst with in exhaust flow, it converts harmful molecules into harmless ones. So, you’ll be able to save money on gas.

That isn’t all, though. However, these converters have an impact on performance. It enhances both the performance and the fuel economy of your engine.

Bonus: Budget-Friendly Tips

how to get more power out of a 5.7 hemi challenger

Three basic upgrades are all you need to do on a low budget.. You’ll undoubtedly notice a significant difference.

Purchase a Tuner:

Tuners can assist you in getting the most power out of your 5.7 Hemi. They also offer a simple installation procedure.

Since the tuner does not require a dyno, you can install the tuner yourself. It will also help you save money.

Plug the custom tuner into the OBD 2.0 port for an easy plug-and-play installation. To find it, look around your emergency brake.

When you install a customized tuner, you can add up to 20 horsepower. You’ll be able to modify your shift points and RPMs as well. As a result, your drivability will improve as well. It’s worth noting that this procedure may necessitate the use of an unlocked PCM.

Install A Cold Air Intake:

A stock air intake is included with the 5.7 crate engine. However, the factory intake is extremely limited.

Install a new aftermarket air intake to replace the old one. This is one way to boost the performance of your Hemi engine. The combustion chamber receives cold air from the cold air intake, which has a higher density.

As a result, the portion produces greater power and burns more oxygen.

Replace The Restrictive Stock Exhaust:

A free exhaust flow will be ensured by replacing the factory exhaust. As a result, your engine will perform much better. As a bonus, it will give you a ton of space for extra goodies.

If you listen closely, you’ll hear the difference in the sound of your exhaust.

There are some highly expensive aftermarket components available. You may prefer to go with the less expensive options.

You intend to boost the power of your engine crate without breaking the bank. Then these upgrades are for you.

Any More Questions?

How much horsepower can you squeeze out of a 5.7 Hemi?

You may add up to 650 horsepower to the 5.7 HEMI engine.

A Mopar cold air intake adds how much horsepower to a 5.7 Hemi?

Around 395-horsepower.

What is the top speed of a 5.7 Hemi?

Although the Hemi-powered 1500 has a certified peak speed, we’ve observed identical top-speed runs when the truck is electronically limited to 105 mph.

Final Say

We hope we could clarify the ways of how to get more power out of a 5.7 hemi. Fix your engine following them and have a smooth ride. 

Let us know if it worked for you. 

Good luck!

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1 thought on “How to Get More Power Out of a 5.7 Hemi? [10 Methods with Bonus Tips]”

  1. Anthony Gallo

    Great article on how to increase horsepower to a 5.7 Hemi Challenger;
    The information was very helpful and shows inexpensive ways to increase horsepower.
    Thank you for info.

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