I just installed an IPD boost gauge on my 05' R that i just got a couple months ago. I was wondering what the stock vacuum should be. I know it should have around 14.7psi boost in higher gears. My gauge is showing 8psi max and spikes to 10 during shifts. The vacuum is reading -18 to -22 while driving & decelerating. I checked for leaks and found a slight kink in the hose. I replaced the ferrals and hose. Gauge is still reading the same and I cannot find any leaks. Any ideas? Thanks ahead of time!