There are usually 2 ports on the TB. One above the throttle plate and one below. You must be on the one above.
The 930 has a vacume retard not a vacume advance. So it retards with vacume.
Dean
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Dean
911 SC turbo, 3.0L 930 motor, G50, 930 brakes, DTA EFI, 352 RWHP DynoDynamic dyno,
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