im asuming by blocking off the by pass valve and doing the "ABV Mod" the sc now runs all the time? because the by pass valve can no longer by pass the air so it has to go threw the sc, in my mind this is just stupid it would mean worse fuel ecconmy when just driving around. plus my ze would hold 12-13 psi all the way to red line no worries. i never get why people change it?