here is a little lesson, just to get you started. Boost is the presence of restriction to airflow and results in increased manifold pressure. so by putting a smaller pulley on the supercharger, there will be more boost and more manifold pressure. if you engine does not have the ability to expel the increased amount of exhaust produced, your computer will cut the timing advance and you will have less power than if you had the correct size pulley on. if you go smaller than you should, the pressure will destroy your engine.
