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Flywheel Power and Driveline Losses: A Deep Dive with HD Tuning

Flywheel Estimate and Driveline Losses: Unraveling the Mysteries with HD Tuning

Understanding True Performance Gains

At HD Tuning, we understand that the essence of vehicle performance lies in the details. In this comprehensive guide, we’re taking a closer look at flywheel power and driveline losses – key factors that significantly influence your vehicle’s efficiency and performance.

Engine, Flywheel Estimate and driveline losses

Understanding Flywheel Power

Flywheel power, or engine power, is the power output measured at the engine’s flywheel. This figure is crucial as it represents the total power generated by the engine before any losses occur in the drivetrain. To truly appreciate your vehicle’s capabilities, understanding flywheel power is essential. Learn more about our approach to engine tuning. This is the approach manufacturers take when broadcasting the power of specific vehicles. Take a look at the specs for the for yourself here. 

Flywheel estimate and driveline losses

Decoding Driveline Losses

Driveline losses occur as power travels from the engine to the wheels, diminished by components like the gearbox and differential. These losses vary based on vehicle type and transmission efficiency. Accurately assessing these losses is vital for a realistic performance evaluation.

To estimate flywheel power from wheel power, we need to factor in the driveline losses. This is often done using a percentage, which can vary but is typically around 15-20% for most vehicles. For instance, if a vehicle shows 200 HP at the wheels, and we estimate driveline losses at 20%, the flywheel power would be approximately 250 HP.

An Example of Post Tuning Flywheel Calculations

To estimate these losses, we start with the factory flywheel rating and compare it to actual power figures measured at the wheels. For example, if a vehicle like the Isuzu NPS 75-155 is rated at 155 HP at the flywheel by the manufacturer (Take a look at the specs for the for yourself here), and we measure, say, 115 HP at the wheels, we can infer the driveline losses. Assuming the factory rating is accurate, the difference of 40 HP (155 HP – 115 HP) represents the power lost through the drivetrain.

Now, let’s apply this to post-tuning calculations. After performing a custom dyno tune, we measure the new wheel power. Suppose the dyno shows an increase to 165 HP at the wheels. To estimate the new flywheel power, we use our previously calculated driveline loss percentage. If we initially estimated a 25% loss (40 HP loss on 155 HP is approximately 25%), we can apply this to our new wheel power figure.

To calculate the estimated post-tuning flywheel power, we divide the wheel power by 1 minus the loss percentage. In our example, it would be 165 HP / (1 – 0.25), which equals approximately 220 HP. This figure represents our estimated flywheel power after the custom dyno tune.

Case Study: The Hino 500 Transformation

One of our standout projects involved a 2018 Hino 500. Post-tuning, this vehicle showed remarkable performance improvements. By calculating the estimated flywheel power, we could quantify the true extent of these enhancements. Dive into this case study here. Take a look at the Hino 500 specs sheet here.

Hino 500 Dyno Tuning Results
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Driveline Losses and Flywheel Estimate
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Hino 500 Custom Dyno Tuning
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HD Tuning's Expertise in Action

Our services, ranging from dyno tuning to specialised tuning for trucks, cars, and even marine vehicles, are designed to address these critical aspects. We’re proud to offer brand-specific tuning for giants including (but not limited to) Caterpillar, Cummins, and Detroit Diesel.

Engine Flywheel Power Estimate and Driveline Losses

Leveraging Advanced Technology

We utilize cutting-edge technology for diagnostics and tuning. Our goal is not just to boost speed or power but to enhance overall efficiency and reliability. Whether it’s a Toyota Land Cruiser or a Mack MP10, our custom solutions are tailored to each vehicle’s unique needs.

What have we discussed?

Understanding flywheel power and driveline losses is more than just a technical exercise; it’s about unlocking the true potential of a vehicle. Whether you’re a car enthusiast, a professional tuner, or someone interested in vehicle performance, grasping these concepts is key to appreciating the real impact of dyno tuning.

"At HD Tuning, we believe in not just enhancing the performance but also in educating our clients about the intricacies of vehicle dynamics." - Alex - Service Manager at HD Tuning

Are you curious about your vehicle’s real power? Looking to optimise performance while maintaining reliability? Contact us for a comprehensive dyno analysis and bespoke tuning services.

At HD Tuning, we’re committed to excellence in automotive performance. Join us on this journey and experience the HD Tuning difference.

Head over to our YouTube Chanel to watch some of the vehicles in action on the Dyno! 

HD Tuning Youtube Channel

Alternatively head over to our FaceBook and Instagram page to see some of our recent work and drop us a DM!

HD Tuning Facebook

HD Tuning Instagram 

When considering value for money and impact, there’s no better value for money than a custom dyno tune. 

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Unlocking the Full Potential of the 2022 Volvo FH16 at HD Tuning

May 6, 2025 No Comments

Unlocking True Power & Efficiency: Custom Dyno Tuning a 2022 Volvo FH16 Built for Performance The Volvo FH16 comes equipped with a 16.1L engine and leaves the factory with 700HP at the flywheel, renowned for its durability and pulling power. This model is a favourite among truck owners who demand reliability and strength, especially when towing heavy loads across demanding terrains. Custom Dyno Tuning Process Using our state-of-the-art bogey drive truck dyno, we logged critical performance data and carried out multiple file revisions to safely enhance the engine’s performance. The tune focused on low-mid range torque gains, ideal for heavy transport and fuel economy improvements without compromising reliability. Stock: Establishing a Baseline The Volvo FH16 comes equipped with a 16.1L engine and leaves the factory with 700HP at the flywheel, renowned for its durability and pulling power. This model is a favourite among truck owners who demand reliability and strength, especially when towing heavy loads across demanding terrains. Stock Dyno Figures POWER: 606.9Hp at the wheels TORQUE: 2707.8Nm at the wheels These numbers are already impressive, but we knew there was room for improvement. With precise ECU remapping and dyno tuning, we aimed to boost power and torque while maintaining fuel efficiency and drivability – all crucial for long-haul operations Results from the Dyno Tune! The FH16 showed noticeable increases in torque across the rev range, smoother power delivery, and better fuel economy. All tailored to the needs of a working fleet vehicle. Post-Tuning Dyno Figures POWER: 664.1Hp at the wheels (+10%) TORQUE: 2971.1Nm at the wheels (+10%) Dyno Proven, Road Ready! Our bogey drive dyno allows us to test under real-world load conditions, giving you results you can feel… not just on paper.This FH16 now leaves the shop with gains that make a difference on long hauls, heavy loads, and fuel economy. Thinking about unlocking the full potential of your Volvo truck? Let HD Tuning take your fleet to the next level! Head over to our YouTube channel to watch some of the vehicles in action on the Dyno!  HD Tuning Youtube Channel Alternatively head over to our FaceBook page to see some of our recent work and drop us a DM! HD Tuning Facebook When considering value for money and impact, there’s no better value for money than a custom dyno tune.  PDI Performance Diesel Intercoolers PDI Isuzu NPS / NPR Truck PDI Heavy Duty Transmission Cooler $950.00 Add to cart AlienTech Powergate 3+ OBD Programmer – Isuzu N Series 45-155/75-155 $495.00 Select options AlphaTech AlphaTech Spark 3 $300.00 Select options Make an Enquiry Subscribe to our Blog! Subscribe

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