The correct term—although a lot less sexy—is a “cold air induction system.” There is a difference; let’s break it down.
For engineers, true “ram air” occurs when the air entering directly into the fuel metering system travels fast enough that a mild supercharging effect occurs—a boost gauge would show a few pounds of positive air pressure on a normally-aspirated engine if it actually experiences a ram-air effect. The operative term here is “fast enough”: Ram air only becomes effective at high speed, providing about 1.2% horsepower improvement at 100 mph, 2.7% at 150 mph, and 4.8% at 200 mph.
この記事は Hot Rod の April 2020 版に掲載されています。
7 日間の Magzter GOLD 無料トライアルを開始して、何千もの厳選されたプレミアム ストーリー、9,000 以上の雑誌や新聞にアクセスしてください。
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この記事は Hot Rod の April 2020 版に掲載されています。
7 日間の Magzter GOLD 無料トライアルを開始して、何千もの厳選されたプレミアム ストーリー、9,000 以上の雑誌や新聞にアクセスしてください。
すでに購読者です? サインイン
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