Joe_Legal SG Like cars, some buses have TC engines, but maybe what you hear are the air brake system releasing the air pressure? Coz this kind brakes are common in buses.
zerocool85 SG yes.. sum buses/trucks are turbo charged and they do have BOVs. these are known as turbo diesel if i'm not wrong.. if u got a chance, listen to the 5-tonner military.. u can hear the turbo beautifully when it accelerates.. i love that sound..
FERRARIman SG Your are true man! when it accelerates u can here the 'sweeeiisshhhh'... like airplane! but after that onli 50km/h!. it locks the speed i think..
