The only dyno line that expands with your needs. Start today with one of our low-cost inertia-only models. Later mount an absorber, expand to AWD, increase data channels, upgrade software, etc. – without wasting your original investment. Excluding roll diameter (see below) most of your important feature decisions may be revisited, even years later. We manufacturer all major components in house – saving you third-party markups of competitors.
• Only doing speedometer calibration, or part-throttle OBD-II checks? Then tiny 8½" Garage Class roll diameters may be okay.
• Tuning 300+ Hp drag/street/rally cars? Get serious with larger-diameter Tuner Class rolls.
• Developing high-speed hyper cars, or performing research work? Demand 36", or larger, R&D Class diameters.
Call to let us help you do your homework on this roll-size topic, and others, or continue reviewing below:
• Roll diameters: 8½", 13", or 20"
• Industry "claimed" flash Hp:* 850Hp, 1,200Hp, or 2,000Hp
• Repeatable power limits:* ~265Hp, ~370Hp, or ~450Hp
• Tire-deformation losses: worst, poor, or fair
• Inertial simulation: poor, fair, or okay
• Installation: pit or lift not required
• Roll diameters: 20", 24", or 30"
• Industry "claimed" flash Hp:* 1,200Hp, 2,400Hp, or 3,000Hp
• Repeatable power limits:* ~450Hp, ~500Hp, or < 675Hp
• Tire-deformation losses: fair, okay, or good
• Inertial simulation: okay, good, or ideal
• Installation: pit or lift suggested
• Roll diameters: 36", 44", or 60"
• Industry "claimed" flash Hp:* 3,600Hp, 4,400Hp, or 6,000Hp
• Repeatable power limits:* ~750Hp, ~825Hp, or ~1,000Hp
• Tire-deformation losses: very-good, better, or best
• Inertial simulation: ideal in all diameters
• Installation: pit or lift required
Related Tech-Talk Topics:
Dynamically balanced and machine traction-grooved rollers
dramatically limit vibration and tire slip – in all roll sizes! So even low-profile garage-class systems
(8-1/2" - 20" rolls) that can be used above ground with ramps, have grip to test many production vehicles. Caster equipped
models roll it to a corner when not in use (just raise their anti-vibration leveling pads). No dedicated test bay, or digging
up floors, required. Just drive it on, strap it down, hook up the tach (or use Smart Ratio™) and test.
Larger-diameter roll systems (24" - 60" diameter) easily handle sustained
higher speed testing at racecar power levels.
→ *Capacities are approximate, as they are primarily tire safety and traction limited – higher torque requires tie downs.
More than acceleration Hp can be measured with DYNOmite eddy-current absorption systems and their strain-gauge-equipped torque transducers. Reading steady-state power requires an absorption dynamometer. Unlike “acceleration spurt” inertial testing, absorbers allow loading vehicles indefinitely.* They permit running RPM-step or sweep-Hp tests – under computer control via included Electronic Auto Load. Controlled loading is vital for the proper mapping of engine management systems and guess-free emissions work. In comparison, inertia “dynos” must calculate power by timing a vehicle's roll (“flywheel mass”) acceleration – like deriving Hp from drag-strip MPH. They cannot hold a MPH or RPM point, while displaying true measured torque and power.
FWD/RWD or AWD (to ~740+ Hp*) chassis systems typically include: 8½", 13", or 20" medium-inertia dual-roller assembly – with machined-in “traction grooves,” removable roller shield, drive-up ramps, support pads, eddy-current absorber (with step-up drive) options, electronic torque transducer, DYNOmite data-acquisition computer, AC power supply, electronic auto-load control, DYNO-MAX software, inductive RPM pickup, engine-temperature thermistor, and full-function data harness. (See optional AWD upgrade, with dual eddy-current absorbers and multi-roll assembly – image at left, or an electrically adjustable wheelbase system – slide-image above.)
High-end Pro chassis systems (to ~2,000+ AWD Hp*) typically include: a FWD/RWD (optional AWD upgrade shown below) tube-steel frame with 24", 30", 44", or 60"-diameter medium-inertia rolls – with machined-in “traction grooves,” bolt-on diamond-tread deck plating, floor anchors, vehicle tie downs, electronic torque transducer and water or eddy-current absorber(s) with step-up drive options, DYNOmite 28-channel data-acquisition computer, inductive RPM pickup, DYNO-MAX “Pro” software, printer, Windows-7®-equipped Dell™ laptop, mobile computer stand, electronic auto-load control, weather station, AFR module, 42" high-volume cooling fan, required absorber hoses, engine-temperature thermistor, and full-function data harness. (See optional AWD upgrade, with dual eddy-current absorbers and 44" multi-roll assembly – image at left.)
DYNO-MAX™ “Pro” Software creates a full vehicle dashboard on your PC or laptop. Features include: real-time trace graph display, adjustable-limit alarm warnings, pushbutton controls, user configurable analog and digital gauge ranges, color graphing, test-report database, instant playback, full inertia compensation, Smart Record™ trigger points, adjustable data dampening, multiple data import/export options, semi-automatic zeroing, voice alarms on all gauges, wireless remote Pocket DYNO-MAX™ control interface, drag strip Christmas-tree console, etc.
Simulate driving conditions by letting DYNO-MAX and your PC take control. DYNO-MAX features a “Road Load Simulation” mode that emulates vehicle momentum, air drag, rolling friction, etc. Enter the vehicle’s weight and drag data and then allow the software to monitor MPH vs. applied Hp, as it adjusts the dynamometer’s road load accordingly. To the vehicle’s driveline and operator, the feel is like actually driving down the road. Fix driveline problems that might never show up in the garage, like shifting issues, driveshaft vibration, brake squeal, bearing noises, brake shudder, exhaust rattles, etc. – without costly field testing. Verify emissions under load with your existing, or our (optional) digitally integrated five-gas DYNOmite Exhaust Measurement System. Rapid on-off set-up makes it practical to skip those old time-consuming road trips. Emission testing requires repeatable loading, on an absorption dyno. Forget using unloaded idle data to verify if repairs are in compliance. Send customers for state inspections with confidence.
DYNOmite data-acquisition computer displays and records true unlimited Hp, torque, RPM, elapsed time, etc. at up to 1,000 readings per second (per channel). It will even automatically apply SAE correction factors for air temperature, barometric pressure, and relative humidity – a full report prints out automatically! Electronic load and throttle control options – just push buttons to select the test RPM, or set a sweep rate and the DYNOmite’s own advanced PID algorithm runs the whole show – all hands free.
*Approximate; limited primarily by tire safety and traction - higher torque transfer requires tie downs. 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.