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Agreed that match-rev downshifting is primarily to preserve the clutch and prevent torque spikes in your drive train.
*When to downshift for engine braking- To control your speed when running down a mountain road. Use minimum braking here.
*When to use brakes- To slow the car under normal driving conditions or at the track.
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2009 Cayman 2.9L PDK (with a few tweaks)
PCA-GPX Chief Driving Instructor-Ret.
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