Tri-Powers and Six Packs were found on some of the most legendary muscle cars of the 60’s and 70’s. When you wanted good gas mileage and driveability, the V8 breathed through the center carburetor. When you wanted more power, the other two carburetors opened up to flow a lot more air and fuel into the engine to make ridiculous power while sounding awesome. Stacey David did this bit for his show, Gearz, on SPEED where he shows how to build your own tri-power or six pack on the cheap using 3 regular carburetors and a conversion kit. Even if you’re not building a tri-power of your own, it’s still pretty fascinating to see how these work.

Part 1: History and Theory of the Tri-Power and the start of the rebuild of the GM Rochester carburetors.

Part 2: Finishing up the Tri-Power with the special outer carburetors built with the kit from Speedway Motors.

Part 3: Building the Mopar version of the Tri-Power using Holley 2 Barrels from Summit Racing. The Six Pack will go from 350 CFM to 1350 CFM when the two 500 CFM secondaries open.

Source: Stacey David’s GearZ on YouTube