Inliners International Forums General Discussion Blown and Injected snowman4839 turbo build

I have a sunpro boost/vacuum gauge hooked to the large manifold vacuum port on my carb. I looked it up and it reads vacuum in inches of Hg (same unit as power valves) and boost in psi. So since it reads vacuum in inches of Hg, when it reads 10.5 vacuum on the gauge, that's when the power valve opens and my wideband backs that up because it richens the mix by about .3-.5 anywhere under 10.5 vacuum on the gauge.
So... there is no need to convert any units to anything else. The gauge reads in a usable vacuum unit.