How do you make car sounds with mouth?

Answer 1

Engine sound: I make car sounds by making the sound when you blow a raspberry, ya know, the lip oscillation. make the lip oscillation as fast and as tight as you can. once you have the ability to do the lip oscillation add a low hum to give the engine a realistic depth of sound.

Shifts: If you want a non turbo shift just make a little kickdrum sound and lower the pitch of the engine sound.

For a turbo shift you do the non turbo shift but with a blow off valve sound, you make a pfff sound, like an air woosh, but with the flittery fluttery sound of a real turbo. This is a very hard to explain noise, i suggest you look on YouTube and listen to skyline or supra turbo sounds.

Also keep practicing, after you get these parts mastered you will be able to imitate specific cars.