Cmq nel primo commento al video è spiegato: il pomello fa attaccare un compressore volumetrico al motore (anche se, credo, il suono sia stato aggiunto dopo visto che non segue i giri del motore...):
"When you see GCS with the tube to his ears he's synching the carbs. the knob he pulls and that whirring sound is the supercharger. (not the heater....) I haven't seen this since 1972. 503 BMW's bring good money now"
edit: mrmagoo mi ha anticipato...
"When you see GCS with the tube to his ears he's synching the carbs. the knob he pulls and that whirring sound is the supercharger. (not the heater....) I haven't seen this since 1972. 503 BMW's bring good money now"
edit: mrmagoo mi ha anticipato...
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