A1000, 4-Port Carbureted Bypass Regulator A1000, 4-Port Carbureted Bypass Regulator AEROMOTIVE The A1000 Bypass Regulators were designed for use with our A1000 and Eliminator Fuel Pumps or similar style EFI pumps in a carbureted application. These regulators are perfect for naturally aspirated or ‘blow-through’ supercharged engines. Base fuel pressure adjustable from 3-15 PSI. (1) ORB-10 inlet port and (1) ORB-08 return port. P/N 13224 provides (4) ORB-06 outlet ports and 1/8′ NPT gauge port. Fuel pressure rises on a 1:1 ratio when referencing boost. Bypass design provides the ultimate, dynamic fuel delivery system. Ideal for converting from fuel injection to carburetion using the stock, in-tank pump. EFI conversions will require a larger-than-stock return line for proper low pressure control.