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Practical Standalone Tuning: Performing a Ramp Run

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Performing a Ramp Run


00:00 When doing a ramp run, the aim is to replicate the way the engine accelerates on the road, so we want to use a realistic acceleration rate.
00:08 If the run's too short, the engine will not be properly loaded and this will affect the way the engine is operating, as well as the accuracy of our tune, and power rating.
00:17 I find that a ramp rate of around one second per 500 RPM works well.
00:22 On a typical run of 2,000 RPM to 7,000 RPM, this would equate to 10 seconds.
00:29 The longer a ramp run is, the more load is placed on the engine and the more heat it produces.
00:35 We need to be careful as it can be easy to end up with an over heating engine if the dyno cooling fan isn't up to the task.
00:43 Once I've completed the full power tuning with a normal run length of one second per 500 RPM, I'll often do a longer run of 1.5 seconds per 500 RPM.
00:53 This puts the engine under a little more load and if everything is OK on the dyno, I can be confident that the tune will be safe on the road or track.

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