If you are concerned about how much you use, then think about how much boost you see. How often to you see 12 psi? How often do you see 12 PSI but don?t get to 18 psi? If you have a logger or tuner, or anyway to monitor knock on your setup, see how the car responds to the increase in turn on pressure?
If you see 12 psi at ?-3/4 throttle, and that all you give it a lot, then it may help you reduce usage by upping the turn on, but if you only see 12 on the way to 26, then I don?t see it doing anything bad, and actually gives the spray a chance to get in there before it is really needed.
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