Quote:
Originally Posted by 19Fordy
Try opening the vent windows a little bit.
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This can definitely help the situation if there's an actual air leak. It doesn't take much of a leak to make a big sound, especially when the interior of the car is an almost perfect acoustic resonance design. Think of the rounded designs of old symphony centers, which concentrate the sound towards the center. Now look at the rounded interior of these old Coupes, which concentrates the sound right where the seats are.
Just my opinion, but I think much of the sound comes from the body itself. Air moving across the body panels creates small vibrations, which are amplified by the rounded interior, which has very little bracing by any "newer" standards...even the '50s, when comfort really started to take hold.
Was the sound deadening removed when it was restored? Was anything used to replace it? Ford used heavy sound deadener in key areas for a reason. Now, it's a science, but these cars needed it everywhere. If it's not done, you get the acoustic resonance. The body is basically acting like an amplifier and speaker. Taking away that vibration with deadening material greatly reduces the transference of the sound wave.