Quote:
Originally Posted by burgermeister
Between the throttle and the supercharger - vaccum just like any NA car.
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+1
Use the stock location between the throttle plate and the compressor, it gets vacuum. Note that if you plumb a boost gauge there that displays vacuum as well, you'll both see vacuum and be able to watch the boost building.
If you plumb the boost gauge after the compressor, you'll not see any vacuum at all (practical experience). Upside is a gauge plumbed here can "see" transient boost spikes - like a slow-reacting recirc valve or wastegate - not available in the stock location.