Thanks. Now I have some understanding of the actual usefulness of multiple carbs in terms of performance. I had always assumed it had as much to do with the ‘cool factor’ as performance.
Stock engines may benefit from multiple carbs, but they have mass produced stamped valvetrain parts without rollers. Race cars have high strength machined valvetrains with rollers designed to rev much higher then stock. The need more or bigger carbs for the extra flow.
Just bolting a bigger carb (or multiple carbs) without high flow heads, headers, and a bigger cam only looks cool, it will not help performance; it could actually hurt causing the engine to stall.