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| Re: CARBURETOR AIR INTAKE (WARM VS COLD AIR) |
Subject: Re: CARBURETOR AIR INTAKE (WARM VS COLD AIR)
by ddgonzal on 2017/8/16 9:18:13
The engine doesn't require cold air nor does it require hot air. However, if the air temperature drastically changes (for example summer vs. winter if living outside the tropics) the carburetor should be retuned. With a regular summer/winter air cleaner, you should re-adjust the idle mixture when the cold season arrives. Automatic Temp air cleaner (ATC) removes this need
The engine will still run OK if you don't retune for cold vs hot, but it runs betters when tuned for the air temperature. This is not an issue in Hawaii (summer is 30C, winter is 26C) but is an issue in say Northern California (summer is 40c, winter is 5C)
The Automatic Temp air cleaner has nothing to do with high speed. It is full-throttle or non-full-throttle. This is because the engine makes the most power with cold (dense) air. But makes best fuel economy will a stable temp. ATC gives it both. Max power when needed (when you floor the accelerator), max economy otherwise
There is another consideration of freezing temperature (the air must be heated slightly to prevent carburetor icing) but that's another story
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