How Accurate is the ProScan Dyno? - Powered By Kayako eSupport

21 May 2013

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	How Accurate is the ProScan Dyno?

Solution The most reliable way to dyno a vehicle is with the use of a chassis dynamometer. However, ProScan is able to estimate a vehicle's horsepower and torque curves based upon factors such as weight and acceleration. As with all acceleration-based dyno tools, such as the popular G-Tech, there are many environmental factors that cannot be controlled. (Wheelspin, drag, road condition, slope, etc.) These factors can lead to unreliable results if care is not taken to minimize their impact.

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Tips for Best Results with the ProScan Dyno Tool:
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* You will need to be on a level road surface. If you are accelerating downhill, your car will accelerate quicker than normal and ProScan will think your car has more power than it truly does. If you accelerate uphill, ProScan will under-rate your vehicle's power.

* You will need to avoid wheelspin. ProScan cannot determine when your vehicle is spinning. If you spin your vehicle's wheels, ProScan will think you are accelerating faster, and the resulting horsepower and torque calculations will be higher than actual.

* You need to make certain that your vehicle's speedometer is properly calibrated for any wheel or tire size changes.

* You should always perform dyno runs on the same stretch of road, in the same direction, and during similar weather.

* You should not expect your ProScan dyno numbers to match those generated from a chassis dyno.

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The ProScan Dyno is an excellent tool for analyzing a vehicle's performance throughout an RPM band. Providing that you follow the above tips, before and after ProScan Dyno charts can be compared to determine how well a modification impacts performance.

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27 Feb 2006 08:54 AM