Originally Posted by
DType
The first wet motor race using hot wire mass flow sensors to determine fuel flow rate was an interesting disaster. Don't know if they overcame the problem, or changed the sensor type!
Good point, most cars these days use thermal massflow sensor to measure air flow to calculate fuel injection times. There's normally a flap valve on inlet to take in warm air on start-up to speed up engine heat up, maybe there's also a dewpoint sensor to ensure air always above dewpoint, or its just mechanical design to not draw in water droplets. Racing cars use ram air effect and want coldest possible air to maximize inlet air density to maximize available power - and most have clearly solved the problem.