What is the difference between the 6.7 and the 6.7 high output?
When it comes to diesel engines, the 6.7-liter Cummins engine is a popular choice for heavy-duty trucks, offering exceptional power and reliability. However, many truck enthusiasts and potential buyers often wonder about the difference between the standard 6.7 Cummins and the 6.7 High Output (HO) version. In this article, we’ll break down the key distinctions to help you make an informed decision.
Performance and Power Output
The most significant difference between the 6.7 and the 6.7 High Output lies in their performance capabilities. While both engines share the same displacement and basic architecture, the High Output version is tuned for greater power and torque. Here’s a closer look:
- Standard 6.7 Cummins: This engine typically produces around 370-400 horsepower and 850-900 lb-ft of torque, depending on the truck model and year.
- 6.7 High Output Cummins: The HO version is designed for maximum performance, delivering up to 420 horsepower and a staggering 1,075 lb-ft of torque in some configurations.
The increased power in the High Output version makes it ideal for heavy towing and hauling applications, providing more confidence and capability when handling demanding tasks.
Transmission Pairing
Another key difference between the two engines is the transmission they are paired with. The High Output version is typically mated to a more robust transmission to handle the increased torque:
- Standard 6.7 Cummins: Often paired with a 68RFE 6-speed automatic transmission, which is well-suited for general use and moderate towing.
- 6.7 High Output Cummins: Exclusively paired with the Aisin AS69RC 6-speed automatic transmission, a heavy-duty option designed to handle the higher torque output and provide enhanced durability.
This pairing ensures that the High Output engine can deliver its full potential without compromising reliability or performance.
Applications and Use Cases
The choice between the standard 6.7 and the High Output version often comes down to how you plan to use your truck. Here are some considerations:
- Standard 6.7 Cummins: Ideal for drivers who need a reliable and powerful engine for everyday use, light to moderate towing, and general work applications.
- 6.7 High Output Cummins: Best suited for those who require maximum towing capacity, such as hauling large trailers, fifth wheels, or heavy equipment on a regular basis.
While the standard 6.7 is more than capable for most tasks, the High Output version is the go-to choice for extreme workloads and professional-grade performance.
Fuel Economy and Cost
It’s worth noting that the High Output version may come with slightly reduced fuel efficiency due to its higher power output. Additionally, trucks equipped with the High Output engine and Aisin transmission tend to have a higher upfront cost compared to their standard counterparts. However, for those who need the extra capability, the investment is often well worth it.
Conclusion
In summary, the primary differences between the 6.7 and the 6.7 High Output Cummins engines lie in their power output, transmission pairing, and intended use cases. The standard 6.7 is a versatile and reliable option for most drivers, while the High Output version is tailored for those who demand the utmost in towing and hauling performance. By understanding your specific needs, you can choose the engine that best suits your lifestyle and work requirements.
Frequently Asked Questions
How much horsepower does a 6.7 Cummins high output have?
Applications
| High Output | Standard Output | |
|---|---|---|
| Horsepower | 420 | 370 |
| Torque | 1,075 | 850 |
| Displacement | 6.7L | 6.7L |
| Number Of Cylinders | 6 | 6 |
Which 6.7 Power Stroke years to avoid?
Ford 6.7-liter Power Stroke Common Problems
Issues with the Ford 6.7-liter Power Stroke are most pronounced in the first generation (2011-2014), but some problems have transcended generations. The injection pump could be trouble in pre-2020 engines.
Is the 6.7 high output reliable?
Life Expectancy and Reliability
The 6.7L Power Stroke is built for longevity – Many owners report reaching well over 200,000 miles with proper maintenance.
What is the difference between the 6.7 and the 6.7 high output Power Stroke?
6.7 and 6.7 High Output Basics
Compared to the standard Power Stroke, which makes 475 horsepower and 1,050 pound-feet of torque, the high-output version improves your towing potential with its higher torque output.
How many miles will 6.7 Power Stroke last?
200,000 to 300,000 miles
How Long Will It Last? With proper care, many truck owners report that their deleted 6.7 Powerstroke engines last 200,000 to 300,000 miles or more. However, neglecting maintenance or using poor-quality delete kits can shorten the engine's lifespan.
Which 6.7 Power Stroke to avoid?
While the second and third-generation 6.7-liter Power Stroke engines are considered to be the best, the first generation — model years 2011 to 2014 — is widely regarded as the worst.
What's the difference between the 6.7 Cummins and the 6.7 Cummins High Output?
In addition to the 50 extra horsepower and the 225 lb-ft of torque gains, the HO Cummins is backed by a better transmission. The SO 6.7 Cummins comes equipped with the Chrysler 68RFE transmission, whereas the Aisin AS69RC transmission handles shifting duties in the HO-equipped Ram 3500 powertrain.
What is the gas mileage on a 6.7 High Output Power Stroke?
And there's still some areas for improvement.
Which 6.7 Cummins to avoid?
We recommend staying away from the 1991, 1992, 1993, 1999, 2001, 2003, 2006, 2007, 2008, and 2011 models. Many issues stem from these years. A few of the common appear in the format of transmission failure, charging system troubles, and electrical issues. These can be costly to handle and inconvenient for any driver.
What makes a 6.7 Power Stroke high output?
Ford released the High Output 6.7-liter Power Stroke Turbo Diesel for use in next-generation 2023 F-Series Super Duty trucks. Enhancements to the 6.7-liter Power Stroke's turbocharger, exhaust manifolds, and tuning increased the engine's output to 500 horsepower and 1,200 lb-ft of torque.
