Belt Tension Calculator for Gates Krikit Belt Tensioners: https://www.gates.com/us/en/resources/calculators/belt-tension-calculator General Formula for calculating speed on most supercharger installations with the supercharger driven from the crankpulley. If you have a Jackshaft, you may have to calculate the pulley ratio, then multiply at the end: Calculator: (Crankpulley / Supercharger pulley) x maximum engine RPM x step-up ratio … Continue reading General Supercharger Knowledge Base: