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Old 03-18-2008, 07:25 PM   #5 (permalink)
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Location: Mirabel, QC
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The Guzzler - '08 Hyundai Elantra GL
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I would definately use the AC during engine braking, as it's energy I'm gonna waste anyway. So instead of totally wasting it in friction and heat on the brake pads, I'd use some to cool the cabin.

During P&G though, your goal is to carry your momentum as much as you can during a coast.
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