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To deliver the highest quality calibrations possible, we believe there is only one option.

About Mainline DynoLog

Trusted by nearly all major players involved in the racing industry, one name is synonymous with world-class dynamometers, Mainline DynoLog.

Located in Sydney, Australia and trusted by customers around the world, Mainline dynamometers are of the highest quality and have capabilities that outstrip other manufacturers. Read more at

 Customers of Mainline include:




T1 Race/Injector Dynamics


Calvo Motorsports

HP Academy

any many more

Traditional dynos, known as "roller dynos" all have one thing in common... they require a wheel and tire to transfer the forces of the engine and drivetrain into the measuring device. This is imperfect, and comes with several downsides.


For example, cars with different wheel and tire diameters will measure power differently. We've all felt this when driving a big diameter  heavy wheel then switching to a smaller diameter, lighter wheel. The tire itself also affects readings. Assuming two cars are tested with the same wheel diameter, but one is wearing a 500 treadwear all-season tire and the other a drag radial, the car with the drag radial will read lower, as the tire itself is not transmitting the force to the roller.


Then you get into the issue of strapping the car down, which puts even more load on the tire (especially if you're losing traction!) and reduces power measured even further.

Engine dynos, exist on the opposite end of the spectrum. They precisely control and receive the engine's forces during testing and can detect the smallest of changes. However, engine dynos require (as you can imagine), the engine to be out of the vehicle and in a specialized test cell. This is expensive,  impractical, and prevents the operator from being able to test the drivetrain, chassis electronics, and real-world conditions the engine will operate in.

Enter the hub dyno. By removing the wheels and bolting four individual power absorbtion modules in their place, the Mainline ProHub dyno is capable of reading horsepower and torque in a crystal clear, unadulterated fashion. There is never tire slip or friction loss. Strapping issues and tire/body clearance is a thing of the past. Cars with aggressive camber or alignments can be tested without fear.


For drag racers, the ProHub also permits full testing of vehicle suspension, as the power absorption modules are bolted directly to the axle and the suspension will react just as it would going down the drag strip. Vehicles can be tested in any condition and any situation can be replicated with the safety of the dyno.

Additionally, this elimination of the wheel and tire eliminates a huge variable and ensures consistency across different vehicles. It also allows the dyno to precisely control the speed of the "axle" so that the calibrator is free to dial up any sort of test they like. The result is unparalleled accuracy, repeatability, and performance.


In a sense, the Mainline ProHub AWD dyno is like an engine dyno that you can bolt to the car.

Our Mainline Dyno

Our Mainline ProHub AWD 4600HP model is one of the premier models in the Mainline dyno family. Featuring four independent power absorption units which bolt directly to the car's wheel hubs, the front modules are rated at 800 HP each and the rear modules are rated at 1500 HP each (conservatively). This means that two wheel drive vehicles can be tested up to 3000 HP and AWD vehicles up to 4600 HP.

We offer many different wheel adapters to suit different vehicle types including drag 5x5x5.5, Euro, Import, and Exotic w/ center lock capability.

Precise wheel speed control is achieved by massive Frenesla retarder modules. Working like a train motor in reverse, these retarders are able to control wheel speed at an extremely precise level. Even the pickiest AWD vehicles will have no trouble on the Mainline ProHub AWD dyno thanks to its ability to match all wheel speeds identically, without error. They also permit extremely consistent steady-state tuning, allowing the dyno operator to hold the vehicle at any RPM and load site they wish, while the vehicle's calibration is adjusted.

Hard wired to the dyno itself is a massive, 3 phase motor and fan assembly  cabinet weighing 280kg (617lbs) which can be entirely controlled by the dyno operator and is fully incorporated to the dyno software. Unlike large generic barrell fans, the Mainline fan ducts its massive amount of air directly into the cooling system of the vehicle to ensure safe and repeatable performance.

The dyno features two external 7bar (90 psi) MAP sensors which can be fitted to the engine to graph boost pressure or measure intercooler pressure drop. Also available is a NTK lambda (AFR) sensor with dedicated heater control and twin RPM pickups (inductive and direct). To ensure reliable and comparable measurement across different weather conditions, the dyno is fitted with a weather station which measures temperature, pressure, and humidity in real-time.

For our standalone EMS customers, the dyno can be wired up as a CAN bus device, allowing any ECU channel to be displayed and graphed alongside in the dyno software.

The dyno cabinet features twin 24" LCD monitors which display the multitude of available data channels and sensor readings clearly and accurately, alongside the power and torque measurements.

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