BIG97 Tri-Power Kit. The 750cfm BIG97 Tri-Power – one BIG97 Primary and two BIG97 Secondary carburetors – PLUS a 9246PRO Chevy progressive linkage PLUS a 9146PRO classic 3-into-1 fuel line. On the outside, it’s Genuine 97 all the way. But on the inside, it’s the ultimate 750cfm hot rod Tri-Power. Totally new 97s with improved fuel circuits, ported distributor vacuum and a whole lot more. With Stromberg progressive linkage and classic 3-into-1 fuel lines, you’re looking at old school carburetion with next level performance and drivability.
Unlike the original 97, the BIG97 was designed from the start to be used in a Tri-Power – a central primary carb plus two less sophisticated secondaries on a progressive linkage. Cruise economically on the center Primary, then punch in the Secondaries when you step on the gas. It’s the perfect bolt-on for your small block Chevy, Ford or other overhead valve motor.
BIG97 secondary carbs have no power valve or accelerator pump circuits, but keep chokes, idle and transition circuits for steady idle and good low throttle manners. Dummy accelerator pumps retain the classic 97 look.
Ported distributor vacuum on the BIG97 Primary connects to your vacuum advance distributor to improve combustion efficiency in cruising mode. You’ll run smoother and cooler, with more torque and better fuel mileage.
It comes ready to run, too, though a wide range of jets and power valves are available to suit individual applications. Every Stromberg BIG97 comes with full installation instructions.
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