Originally Posted by
bvgs
... I’m just wondering why the carb gets so cold when the butterfly valve is almost fully open. Is it simply the vast amount of air being sucked in? Thanks for any insights👍🏻👍🏻
In order to atomise the fuel and turn it from liquid into gaseous form, energy is required (gaseous state having a higher energy than liquid state). This transfer of energy from the air to the fuel 'sucks' heat out of the air and cools it down slightly. There's far more thermodynamics than I can comprehend going on in reality, but that's one mechanism at work explained in a simple way that can help explain the temperature drop from ambient even at full power.