I have a 1990 LX hatch with a 5.0 and 5-speed. Its is N/A, my mods are in my sig. but I'm wondering if it's possible to put a blow off valve on a N/A car. I know the purpose of one on a turbo/supercharged engine, but can it be done on a car without one? Just so when I hit that RPM or shift it comes on?