We build an Air Fuel test set for tuning carburetors. We show how to do it using a volt meter and how to build a mack daddy one using parts available from Summit Racing. Thanks for watching! Home page: http://www.autorestomod.com/ Rate, ask questions, we are very good about responding! Jeff Ford Contact: [email protected] Sponsor: http://www.nationalpartsdepot.com Parts: www.summitracing.com Digital Gauges: SUM-G2986-1 Bosch Premium Universal Type Oxygen Sensors 11027 Weld-In Oxygen Sensor Fittings SUM-G2990 Oxygen Sensor Plugs SUM-G2990-1 Stewart Warner Performance Gauge Mounting Panels 814143-F www.napaonline.com