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There's an app for that! Basically if you can constantly measure the acceleration of your car, you can calculate horsepower and torque. I know I have seen advertisements in car magazines in the past for devices you would sick to the windshield, but since smartphones are so widespread and have such advanced accelerometers, Apps have taken over. I don't ...


8

NOTE: The following example assumes output in lb-ft & horsepower. Dynamometers can also measure torque output in Newton Meters or Kilowatts just as easily, or any other measure of torque and power, for that matter. First off, let's get everyone on the same sheet of music. When it comes to vehicles, there are two basic types of dynamometers: engine & ...


7

Generally, in the automotive world, there are two different types of dynamometer (or dyno for short) which might be used: chassis dyno; engine dyno. I'll discuss the general procedures for each type of dyno. Every dyno operator has their own procedure and will operate it how they see fit. You have to allow for this mainly because it's their dyno, they paid ...


4

"Driving" the car on a dyno/rolling road will approximate road driving for the most part and should ensure that the drivetrain gets the roughly the same benefits as a real-world drive and will keep wear and tear on suspension and steering components to a minimum (just as if you were driving straight on flat smooth tarmac for many miles). Pros: No ...


2

Every dyno is going to read things differently. This is inherent due to several factors, which include, but are not limited to, atmospheric conditions (temp, barometric readings, etc), testing conditions (do they place a fan in front of the radiator, how tight did they tie down the vehicle, etc), type of dyno (eddy current or acceleration), or manufacturer ...


1

Same day runs of the same car on the same dyno should be the same or very nearly the same (keeping in mind that a cold, a warm and a heat soaked car will all make different horsepower). This is one of the few ways to get a reliable measurement of how much impact a modification has on power levels. When you dyno a car six months apart and do a modification in ...


1

The length of a line you measure is only as accurate as the rule you use to measure it with, a similar principal applies here. Essentially a dynamometer works by measuring the acceleration applied to a mass, from this it can calculate the torque which was applied. Each of the measurements and calculations performed will have an associated margin of error ...


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