The siren wasn't on its full sound power, as the guy's voice could be heard through it. I do not see any air-pipe running to the chopper, though I think that there is a compressor.
Wow. Nice video. I wonder how long to really took to get that engine to fire over. I'm surprised they engauged the siren in that garage. Even at idle speed that had to have been loud.
wow and who ever thought that big daddy don garlet one of the most famuse drag races and one of the fathers of the sport would be into air raid sirens and one of the biggest sirens out there allso absoutly awsome.!