When was the last time you turned off your radio and just listened to your car? What’s really going on under the hood? We chat with our own Nick Spradlin about the simple force at the heart of every gasoline engine and talk with legendary recordist Watson Wu about how the sound of wild and powerful sports cars are captured.

Twenty Thousand Hertz is produced out of the studios of Defacto Sound, and hosted by Dallas Taylor.Follow the show on Twitter & Facebook.Become a monthly contributor at 20k.org/donate.If you know what this week's mystery sound is, tell us at mystery.20k.org.Check out and subscribe to ZigZag wherever you get your podcasts.Episode transcript, music, and credits can be found here: https://www.20k.org/episodes/vroomvroomLearn more about your ad choices. Visit megaphone.fm/adchoices