Bill,
Being one of the resident 964 experts, do you think the small vacuum reservoir is adequate for sustained full throttle running? The reason I ask is my car always feels a bit soft on the top end after 15+ minutes of track time. I was wondering if the reservoir could be depleted after sustained full throttle running preventing the secondary flaps from opening? Plausible or would deceleration help generate additional vacuum?
964,
The white nipple you circled (on my car) goes to the circular vacuum reservoir in Bill's second photo. The black nipple goes to the lower flapper.
Tinker