Manifold Vacuum Experiment

When I connected to MV, I had to reduce the static timing to 5* since my happy place is 25* and the can ads an extra 20*. Now I have to rethink my curve because..... When MV drops off when accelerating from idle, the centrifugal is starting from 5* as opposed to 25*.
That's sometimes necessary, depending on what the vacuum can pulls in. But you already knew that. lol