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Old 04-17-2009, 08:29 AM
joe_padavano joe_padavano is offline
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Several sources (such as the Doug Roe Qjet book) indicate that there's a one HP increase for every 7-10 degree drop in inlet air temp. Unfortunately, most aftermarket "cold air" packages for newer cars discard the factory ducting that really does pull in outside air and replaces it with a cone filter under the hood sucking hot air from behind the radiator. DOH!
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