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CAPABILITY
To the right, Casper Coupe is being tested on the dyno prior to flying to its new home in England. The new wall fan in front of Casper moves 8000 cu ft of fresh air per minute.
The chassis dynamometer (dyno) allows running the complete vehicle on a set of wheel rollers in a building. Thus, it can be subjected to speeds & loads of the highway while stationary.
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This allows instrumenting & adjusting while running in an enviroment similar to that on the highway. As such, the following can be accomplished:
1. Diagnostic testing for problems such as driveline and engine related vibrations, restrictive inlet & exhaust, cooling, speedometer calibration, etc.
2. The engine tuning can be optimized for timing, carburetor jetting, fuel injection mixtures, octane, valve adjustment, exhaust system for best power & economy.
3. On performance vehicles, the results are a power curve & determining the optimum shift points for maximum acceleration.
4. Vehicles of up to 600 horsepower can be run at speeds up to 120 miles per hour.
5. The EPS dyno system is capable of handling two wheel & most four wheel drive vehicles.
6. Engines running on gasoline, alcohol, propane, natural gas & diesel fuels have been tested, along with turbocharged, supercharged, and nitrous systems.
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In the interest of accuracy reliability, the dyno has four fans and a water spray system. These are for maintaining temperature control of engine cooling system, oil, and inlet air. The fans are also used to maintain safe under vehicle temperatures. The technician operating the vehicle from the driver’s seat remotely controls the fans and water spray. This technician monitors operating conditions and uses the fans & water spray to keep them at safe levels. A second technician works outside the vehicle monitoring dyno & external engine guages and making necessary adjustments. An optional automatic water-to-water intercooler is available, replacing the vehicle radiator, for maintaining engine cooling system temperature of plus or minus two degrees.
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The photo to the left shows the water-to-water intercooler. It is the gray vertical tank just in front of the Shelby.
Since the vehicle is not moving, there is no loss of oil pressure, due to accelerating, braking, or cornering.
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Vehicle data is gathered during controlled dyno runs of 5 to 10 seconds. This minimizes engine stress, unlike the extended run times that the vehicles are subjected to on the highway or track. Without highway distractions, the inside technician can concentrate on guage readings and control max engine RPM within safe levels.
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In addition to measuring road speed and horsepower, the EPS system uses a four-gas exhaust analyzer. This measures carbon monoxide (CO), hydrocarbons (HC), carbon dioxide (CO2), and oxygen (O2). From these engine exhaust readings, the air fuel ratio and ignition defects can be determined. An ignition scope and vacuum/boost and fuel pressure guages are used. Numerous thermocouples for measuring temperatures, manometers for very low pressures, fuel flowmeters, and an infrared remote temperature gun are also part of the EPS instrumentation system.
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EXPERIENCE BACKGROUNDS
Walt Hane has been using engine & chassis dynos since the early 1950’s. While an experimental test engineer with the Ford Motor Company, he had technical responsibility for the use of six chassis dynos. Walt’s company has owned dynos since 1972. Chip Hane has over twenty years experience with dynos.
PARTS IN STOCK
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EPS carries a large stock of tuning & repair parts for Holley, Weber, Edelbrock & other carburetors. These include jets, chokes, emulsion tubes, spacer plates, screws & gaskets. EPS also has fuel from low to high octane in stock.
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TYPICAL CHASSIS DYNO JOBS
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Dyno jobs run from solving problems on old work trucks that other shops have been unable to find to fine tuning exotic cars & high bread racing machines. Some interesting jobs include trouble shooting, repairing & tuning a 29 Rolls Royce, building and getting a turbocharged Delorean through federal emissions certification for local dealers, building and setting up a twin turbo system for a 440 Winnabago motor home, setting up the fuel injection on modified Porsche & BMW engines. A number of jobs were done for inventors, optimizing & evaluating their designs. Our work has been written up in various publications.
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For more information:
E.P.S., Inc.
P.O. Box 1043
Evergreen, CO 80437-1043 US
Email: epswalth@aol.com
303-674-6017
© Copyright 2008 This website was created by SNetSolutions
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