• Small Engine (Kart) DynoModular dynamometers for the lab, school, or race team
Small Engine (Kart) Dyno1 2 3 4 5

Land & Sea’s DYNOmite Kart Dynamometers – modular dynamometer labs for the school, kart race shop, or track. Dynos that mount easily, with or without engine removal. Precision, strain-gauge torque readings provide repeatable brake engine horsepower. Integral computer calculates, displays, and stores RPM, Hp, torque, time, etc. – data-acquisition system also doubles as a sophisticated on-track recorder.

“Provides actual torque and computerized Hp data – not just hydraulic-pressure conversion ‘guesstimating’ or flash inertia-only readings!”

DYNOmite Kart Dynamometer Kit – ideal for sophisticated testing of many small performance and industrial engines. Shown with LCD and keypad option (without carrying case).
Step #1, make personal contact! Phone: 603-226-3966 now.
Step #1, make personal contact! E-mail: [email protected] now.
Dyno cell plans or complete pre-fab soundproof rooms, including ventilation, are also available. Above is a shot of one of Land & Sea’s in-house small-engine training cells.

 Standard dyno kits include: 7" toroidal-flow water-brake absorber (with 5" high-RPM rotor), electronic torque-arm transducer, engine load control, DYNOmite handheld data-acquisition computer, AC power supply, stainless-braided hoses, magnetic RPM sensor, data wiring harness, and protective carrying case. See Specifications or Models and Prices pages.

DYNOmite data-acquisition electronics eliminate “wishful” paper and pencil hand-logging. The DYNOmite computer records true Hp, torque, RPM, elapsed time, etc. (at up to 1,000 readings per second) while automatically applying SAE correction factors for air temperature, barometric pressure, and relative humidity. Estimating power from hydraulic-pressure conversion charts is not required. Neither is running an engine to death to get a full test curve. Keypad-model DYNOmites display results on their LCDs, and can print to an optional portable ASCII parallel printer. Watch the video!

DYNO-MAX dynamometer control software screen. DYNO-MAX dynamometer software graphDYNO-MAX™ Software option creates a full engine dynamometer lab console on your PC. Features include: real-time trace-chart graph display, EGT bar graph, inertia compensation, user- adjustable visual and voice limit warnings, pushbutton controls, and user configurable analog and digital gauge ranges. With the optional electronic auto-load control (or electronic throttle) you can easily generate and execute complex race track road-load simulations, engine tests, or break-in cycles. Setting up a test is as simple as making a few mouse clicks, to set the test RPM points and desired sweep rate. Then, just allow the DYNOmite’s PID algorithms to run the whole show. (Click for full list of features.)

How does it work? The DYNOmite’s absorber is actually a very inefficient centrifugal water pump – with a variable flow control. The more water provided to the absorber, the more power this pump requires. It acts as a brake on the crankshaft. The resultant absorber housing’s torque and engine RPM are monitored by computer. During a test, the dyno operator regulates the engine’s RPM by adjusting supply water via the absorber’s “load control valve” – to slowly sweep it through the desired range. The DYNOmite calculates horsepower via the standard formula: Hp = Torque (in foot pounds) x RPM / 5,252.

Patented torque transducer technology is moment-length independent. Its temperature- compensated strain gauges, which measure true shaft torque and power, require no recalibration for changes in the support geometry. This simplifies fabrication of your own engine test stand or in-vehicle mounts. Pushbutton, semi-automatic offset for the zero calibration point is also standard.

Junior Dragster with 7” DYNOmite Kart Kit, ready to test.

30+ Hp* capacity with our standard toroidal- flow water-brake absorber (or 60+ Hp* using high-torque rotor). The toroid’s ultra-low volume design provides control stability and response unmatched by simple vaned brakes. Loads typical kart engines from a garden hose water supply.* (Many other size water or eddy-current absorbers available to test virtually any capacity engine.)

MAX – How Water Brakes Work - Animated look at how water-brake absorbers create load (MAX narrated).

High-RPM two-stroke is mounted on this OEMs’ direct-drive, reaction-cradle, eddy-current dynamometer.

Direct crankshaft mounting on most engines eliminates any “factoring” for drive-train losses. The 5" (or optional 7") rotor’s arbor fits directly onto standard ¾"-diameter 3/16"-keyed shafts. An optional 9" absorber fits 3° (1:10) and 4° (1:7.5) tapered PTOs. If clearance is available, engines can be tested right in the vehicle’s chassis – using an optional rear-axle adapter.

Precision designed and manufactured for flexibility, strength, high accuracy, and reliability. Each water absorption brake, torque arm, load-valve, etc. is beautifully CNC machined out of anodized aircraft billet aluminum and 17-4 heat-treated stainless steel.

Sophisticated standard features include: Smart Record™ data- capture triggering, user-adjustable recording rate, full-channel data dampening, sophisticated spike- filtering algorithms, drive and gear- ratio compensation, playback time or RPM based data averaging, STD or SAE atmospheric correction, instant test-run data playback, semi- automatic zeroing of torque offset, and an integral engine-RPM rev-limiter.

DYNOmite industrial (small-engine) vertical/horizontal dynamometer systems - featuring AC, eddy-current, or water brake absorption.

Small Engine Test Stand option adapts to ATV, chain- saw, kart, motorcycle, PWC, snowmobile, and industrial engines. Features rugged steel construction, universal engine plate, vibration-isolation mounts, battery tray, integral shelf, engine-control console (wall mountable), wheels, leveling pads, and openings for optional engine throttle and load controls. Accepts many engines but may be drilled for unique applications or to accept pillow- block jackshaft bearings. Optional overhead skyhook boom supports fuel, electrical, and exhaust systems. Fan cutouts are provided to cool eddy-current absorbers.

Kart Chassis Roller Assembly which allows for inertial acceleration testing (even without the 9” absorber), or steady-state testing when it is installed as shown.

Schools teach engineering principles using accurate and repeatable, yet inexpensive, DYNOmite small engine dynamometers. They are used by both private and public colleges, as well as technical schools – around the world.

Develop faster karts by separating what does work from what should stay on the shelf – with less trial and error. In hours, rather than seasons, you can find those tuning combinations that keep top racers out front.

Reaction-cradle dynamometer combines laboratory-grade accuracy with freedom from inertial influences.

Increase profits by selling dyno tuning while enhancing your shop’s engineering image. You can even display the DYNOmite to potential customers as advertisement.

DYNO-MAX dynamometer control software screen.

Affordable upgrades including: five-gas exhaust analyzer, thermostatically controlled cooling tower, fuel-flow and airflow turbines, weather station, EGT (exhaust-gas temperature) thermocouple kits, RTDs, sparkplug/head thermocouples, pressure transducers, knock sensors, temperature thermistors, auto-servo load and throttle control.

Live-person technical phone support, from the company that revolutionized small engine dynoing, beats other companies’ obnoxious voice-mail runarounds. Our standard hardware phone and e-mail support, plus access to the special DYNOmite owners 24/7 web support area, are all FREE!

*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.

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