Can anyone tell me why my car it sound like this
 

i got a 93 fd and when i bought it i boost it couple of times but never had the sound in the video before... some people tell me it could be the water pump because sometimes they sound when they are about to break... but pease any body let me know....

there is another video it says Carlitos civic vs juanito rx-7 tercera ronda.... thats the rx-7 by it self you could here it better