• PORTABLE AXLE-HUB DYNOS:Test vehicles without traction repeatability issues or tire deformation losses

Manufacturing world's largest axle-hub dynamometer line, in an affordable range of classes.  All measure true installed horsepower – no “estimating” tire drag and slip losses.

“Quick roll-in mounting with automatic camber adjustment… no leveling necessary!”

Step #1, make personal contact! Phone: 603-226-3966 now.
Step #1, make personal contact! E-mail: [email protected] now.

The only dyno line that expands with your needs. Start today with a low-cost inertia-only model. Later mount an absorber, expand to AWD, add channels, upgrade software, etc. – without wasting your original investment. Excluding absorber-type (see below) most feature decisions may be revisited – years later. We manufacturer all major components in house – saving you third-party markups of competitors.

One size does not fit all! The above paragraph notwithstanding, one unique specification will lock you in: absorber type. It limits the type of testing of you axle-hub dynamometer.

    • Only doing flash-power checks? Then an inertia only Sport Class may be okay.

    • Tuning engine-management systems? Get serious with eddy-current Tuner Class absorbers.

    • Developing advanced ECUs and traction controls, and require road-load simulations? Demand A/C (motoring), R&D Class absorbers.

Call to let us help you do your homework on this absorber-type topic, and others, or continue reviewing below:

Sport Class
Dynos →

Sport Class Inertia-dyno limitations:

Tire on 8-1/2 inch rolls. Inertia-only axle-hub units are best limited to casual flash-power comparisons. Bottom line, if your primary usage will be performance tuning, specify an eddy-current absorber system.

• Loading type: inertia (limited-slip differentials only)

• Acceleration (flash) Hp:* ~1,400Hp (2wd) - depends on rate

• Absorption (steady state) peak Hp:* ~zero

• Tire-deformation losses: none

• Inertial simulation: okay

• Installation wiring: 120v or 240v 15-amp outlet

Tuner Class
Dynos →

Tuner Class Eddy-current dyno limitations:

Eddy-current absorber example. Eddy-Current absorbers are well suited for axle-hub dynamometer tuner/testing applications. They provide the steady-state loading required to tune RPM steps in ECUs, and allow turbocharges to spool up to realistic boost levels. They also offer a great horsepower-per-dollar value, compared to expensive A/C motoring absorbers. In fact, their ability to also accept the ActiveSync option, even retroactively (after) the initial purchase, allows combining many of the benefits of R&D-level A/C axle-hub dynamometer systems.

• Loading type: eddy-current absorbers

• Acceleration (flash) Hp:* depends on rate

• Absorption (steady state) peak Hp:* ~1,000Hp, ~1,250Hp, ~1,500Hp, ~3,000Hp, ~4,000Hp, or ~10,000Hp (2wd)

• Tire-deformation losses: none

• Inertial simulation: fair

• Installation wiring: 240v 30-amp single-phase

R&D Class
Dynos →

Tuner Class A/C dyno limitations:

Tire on 36 inch rolls. A/C (motoring) absobers are best suited to road-load simulations and similar lab-level testing. They provide the motoring capability necessary to more accurately replicate off-throttle and downhill driving conditions. In situations with long-duration tests, the ability to regen power into the grid, reducing the company’s electric bill, can eventually offset their high initial cost.

• Loading type: a/c (motoring) absorbers

• Acceleration (flash) Hp:* ~250Hp or 500Hp (2wd)

• Absorption (steady state) peak Hp:* ~200Hp, ~400Hp (2wd) or call for more

• Tire-deformation losses: none

• Inertial simulation:  fair to good

• Installation wiring: 240v or 480v HD 3-phase


  • 1400 SERIES INERTIA-ONLY 2WD:1,400+ Hp** (Sport Class) - inertia-only - heavy-duty rolling frame - with camber compensation and flange adapters

Related Tech-Talk Topics:

Stick-figure speaker at chart
DYNOmite-Pro AWD Chassis-Dynamometer product overview. Note: Generic model – may include non-standard options.
Sample chassis-dynamometer bay layout. Stick man confused about path to take.

More Tech-Talk Articles...


Stick-figure cranking money-making machine.
Financing is available to let you start making money from your investment, before making a payment! Our equipment financing options allow you to generate revenue – with low monthly payments, that are 100% tax deductible to the IRS. Better yet, these financing options avoid restrictive bank ratio calculations and keep any bank lines of credit your business has – open.

   → Click for Equipment Financing.
DYNOmite Axle-Hub Dynamometers are available with eddy-current and/or AC (motoring) absorber options. Motoring allows for coasting and down-hill road-load simulations − important for off-throttle tuning and emissions work.
More than flash-acceleration Hp is available from DYNOmite load-cell equipped eddy-current absorption systems. They permit indefinitely* running steady-state, RPM-step, or sweep-Hp tests – under computer control. Absorber loading is vital for ECU drivability mapping or emissions work. In comparison, inertia-only “dynos” can’t hold an RPM point, but calculate power from flywheel (roll) mass acceleration – like deriving Hp from drag-strip MPH.
Roush Mustang being tested on DYNOmite Axle-Hub Dynamometers. Units are available for testing 2WD, 4WD, and AWD vehicles in excess of 2,000 Hp.
FWD/RWD 1,000+ Hp* axle-hub kits typically include: a pair of rolling modules with eddy-current absorbers, automatic camber compensation, thermostatically-controlled fans, dual load cells, swivel casters, quick-change axle-flange adapters, DYNOmite data-acquisition computer, inductive RPM pickup, data harness, AC supply, and DYNO-MAX software. (Upgradeable to AWD, with four absorbers and/or ACtiveSync™ axle synchronization, at any time.)

   → See General Specifications or Models and Prices pages.
Our “multi-roll” mechanically-linked AWD dynamometer option allows hassle-free testing of FWD or RWD traction-controlled vehicles, as well as 4WD and AWD applications.
2,000+ or 3,000+ Hp** Pro AWD axle-hub systems typically include: four heavy-duty rolling modules with eddy-current absorbers, automatic camber compensation, thermostatically-controlled fans, electronic AWD-axle synchronization, four load cells, swivel casters, quick-change axle-flange adapters, DYNOmite data-acquisition computers, inductive RPM pickup, data harnesses, AC supply, and DYNO-MAX software. Available with ACtiveSync™ upgrade (A/C motoring axle-synchronization option).

   → Watch this axle-hub dyno instalation-demo video!
DYNOmite AWD axle-hub dynamometers, on EVO 9, at Bertolina’s dyno facility.
Traction-Controlled Front, Rear, or All Wheel Drives can be run on appropriate-model axle-hub system, using our ACtiveSync™ axle-synchronization modules. These units feature 20-Hp motoring-drive units, with micro-second response AC controllers, to provide precision matching of unpowered axles – during 2WD testing (of traction-control vehicles). Dynamic rotor balancing, concentric-lock bearings, and innovative camber compensation limit vibration – test capable vehicles to 200 MPH.
DYNOmite 50,000 and 100,000 foot-pound tractor axle-hub dynamometers with EIGHT or TWELVE #650 eddy-current absorbers!
Multi-eddy configurations offer capacities to 10,000 Hp or 100,000 foot-pounds of torque – and long-duration absorption (for lesser engines). Only axle-hub (or engine) dynamometers isolate Hp from the inconsistencies of tire-to-roll traction – providing repeatable data that serious tuners and engineers need to compare against baseline tests. Precision full-bridge temperature-compensated load cells read TRUE axle-hub Hp, while driveline-inertia compensation allows rapid transient testing.
DYNOmite axle-flange adapter assortment
Quick-change axle-flange adapters and caster-equipped modules are easy to set up. Remove the tires, couple the adapters, and test. When done, each units wheels allow rolling it into a corner. No dedicated test bay, car lift, or digging up floors (to construct a large pit) is required. Unlike engine dynos, axle-hub testing avoids engine removal.

   → Click to Axle-Hub Dyno Options.
DYNO-MAX dynamometer control software screen.
DYNO-MAX™ “Pro” Software creates a full console on your PC. Features include: real-time trace-graph display, adjustable-limit alarms, pushbutton controls, user-configurable analog and digital gauges, customizable graphing, formula editor, test database, instant playback, inertia compensation, Smart Record™, adjustable dampening, import/export options, automatic zeroing, voice warnings, dragstrip Xmas-tree console, free iPhone control app, etc.

   → Click for full list of DYNO-MAX features.
Smart-Car axle-hub dynamometer testing − with ACtiveSynch™ motoring option. AC motoring allows realistically simulating coasting and long down-hill grades.
Simulate driving conditions with DYNO-MAX “Road Load Simulation” mode. It emulates vehicle inertia, air drag, rolling friction, road grade, etc. – adjusting the absorber’s load accordingly. Fix driveline problems that never show up in the garage, without costly field testing. ECU mapping and emission work requires repeatable loading, on an absorption dyno.

   → Click to digitally-integrated 5-gas Exhaust Measurement System.
DYNOmite data acquisitio electronic circuit-board set.
DYNOmite data-acquisition computer displays and records true Hp, torque, RPM, elapsed time, etc. at up to 1,000 readings per second (per channel). It even applies SAE correction factors for temperature, barometric pressure, and humidity – a full report prints out automatically! Electronic load and throttle control options – just push buttons to select the test RPM or sweep rate and the DYNOmite’s advanced PID algorithm runs the show – hands free.

   → Click for full list of DAQ features.
DYNOmite eddy-current track (or clutch only) driven dynos. Custom designed for snowmobile OEM’s load simulation and Hp. (Call for more information.)
Specialty axle-hub (PTO) dynos are also available, as custom systems, for testing ATVs, karts, snowmobiles, tractors, and other recreational or industrial vehicles. As these pages show, we manufacture more types of dynos than any other company in the world. For your unique dynamometer system needs, please call us for help!

   → Or, see Manufacturing Services page.

*Approximate; continuous capacities depend on selected absorber and test speed. Air-cooled absorber loads are rotor temperature dependent. Water brake power capacities are RPM dependent and assume a minimum water supply of 1 gpm @ 30 to 60 psi for every 20 continuous Hp. Call Land & Sea, Inc. at (603) 226-3966 for the approximate capacity of any specific test configuration.

Get your FREE dyno “bible” today!
It’s the world’s most comprehensive
engine/chassis dynamometer catalog.

Take 60-seconds, to get yours coming:
Click to FREE catalog form

But, since we are in right now:
Click to Chat or Phone Phone