Can I Upgrade ISL9 350 to More Horsepower?

The ISL9 350 engine, renowned for it’s performance and reliability, has long been a popular choice among enthusiasts and heavy-duty vehicle owners. However, if you find yourself craving even more horsepower from this already impressive powerplant, you may be wondering if it’s possible to upgrade it. Fortunately, the ISL engine's horsepower potential can indeed be enhanced, as it’s been offered in ratings of up to 450 hp. To achieve such an upgrade, the process typically involves a boost increase, allowing for a 10 percent horsepower boost. However, should you desire a more substantial horsepower increase, it’s likely that both the charge cooler and turbo replacement would be necessary. By conducting a comprehensive upgrade, you can unleash the full potential of your ISL9 350 engine, ensuring an exhilarating driving experience that surpasses all expectations.

How Much Horsepower Does the ISL9 Have?

The ISL9 engine, developed by Cummins, boasts an impressive power output of up to 540 horsepower. This showcases the reliability and dependability that the renowned L9 platform brings forth across various industries it serves. Cummins has harnessed it’s expertise to design the ISL9 with utmost precision, ensuring optimal performance in a range of applications.

This powerhouse engine caters to diverse sectors such as transportation, construction, agriculture, and more, cementing it’s versatility in the market. With it’s robust design and engineering, the ISL9 remains a top choice for those seeking exceptional horsepower.

This extraordinary horsepower capability not only enhances overall performance but also enables operators to tackle challenging tasks with ease.

The 5.9-liter engine, in it’s standard version, generated 230 horsepower and 325 lb-ft of torque. However, the heavy-duty variant delivered 330 lb-ft of torque at a lower rpm. In 1998, the power output was further enhanced to 245 horsepower and the torque increased to 335 lb-ft.

How Much Horsepower Does a 5.9-Liter Have?

The 5.9-liter engine, a popular choice among automotive enthusiasts, offers impressive horsepower and torque figures. In it’s standard configuration, this engine has been known to produce 230 horsepower (172 kW) at 4,000 rpm, delivering a considerable amount of power. The torque output is equally impressive, with 325 lb⋅ft (441 N⋅m) at 3,200 rpm. However, for those seeking even more muscle, there’s a heavy-duty version available that offers additional torque at 2,800 rpm, boosting it to 330 lb⋅ft (447 N⋅m).

Whether you require ample horsepower for quick acceleration or substantial torque for towing heavy loads, this engine can deliver on both fronts. It’s versatility and strength make it a reliable and robust option in the automotive world.

It’s worth noting that horsepower and torque figures can vary depending on additional modifications or aftermarket enhancements made to the engine. Overall, this engines performance capabilities, coupled with it’s reputation for durability, have solidified it’s position as a formidable force in the automotive industry.

With it’s standard configuration producing 230 horsepower and 325 lb⋅ft of torque, and the heavy-duty version offering even more torque at 330 lb⋅ft, this engine has established itself as a powerful performer. The 1998 upgrade further enhanced it’s capabilities, raising the horsepower to 245 and torque to 335 lb⋅ft.

Source: Chrysler LA engine – Wikipedia

of torque. The L9 engine is renowned for it’s robust power output, making it a popular choice for various applications such as medium-duty trucks, buses, and other commercial vehicles. It’s horsepower range provides flexibility to cater to different performance needs, ensuring optimal efficiency and reliability. With it’s proven performance ratings, the L9 engine continues to deliver the power and torque required for demanding tasks.

How Much Horsepower Does a L9 Engine Have?

Of torque (746 N.m) at 1,000-1,400 rpm. The L9 engine, manufactured by Cummins, is an efficient and powerful engine that’s commonly used in a variety of applications, including heavy-duty trucks, buses, and industrial equipment.

With a displacement of 8.9 liters, the L9 engine features a number of advanced technologies that contribute to it’s impressive performance. These technologies include a high-pressure common rail fuel system, a variable geometry turbocharger, and an integrated engine brake. These features not only enhance power output but also improve fuel efficiency and reduce emissions.

In addition to it’s impressive power rating, the L9 engine is also known for it’s smooth and quiet operation. Thanks to advanced noise reduction technologies, the engine produces minimal vibration and noise, creating a comfortable and quiet driving experience. This feature is especially important for applications where noise levels need to be minimized, such as in buses or delivery trucks operating in residential areas.

It’s proven performance ratings range from 260 to 380 horsepower, ensuring that it can meet the needs of a wide range of applications.


In conclusion, the possibility of upgrading the ISL9 350 engine to achieve more horsepower depends on the desired increase. It’s important to consider the engine's capacity and compatibility with these modifications to ensure optimal performance and reliability.

Scroll to Top