Another thing thing to think about.... You set the boost pressure with the blower speed, eg 10Psi. You would then have the blow off set at maybe about 20psi or higher. High enough to prevent any chance of it cracking open unless there is a back fire. Otherwise you will be filling the engine bay with explosive gasses. As long as it is set lower than the pressure that could possibly damage the manifold or blower when or if there is a back fire.