I have a Dual Turbo Timer, where do the small vacuum hose go to on the brain unit?
The small vacuum hose is for the internal boost gauge in the turbo timer. It goes to any vacuum source after the throttle body. An example is to tee it off the fuel pressure regulator. The vacuum line must be connected for the auto timer function to work for the Dual Turbo Timer because it automatically calculates the count down time depending on the boost pressure and how the car was being driven.
