On the outside, it’s Genuine 97 all the way. But onthe inside, we’re talking the ultimate 750cfm hot rod Tri-Power, with new improved fuel circuits, ported distributor vacuum and a wholelot more. Add our progressive linkage and classic 3-into-1 fuel lines and you’re looking at old school carburetion with next level performance and drivability. All BIG97 Tri-Powers are priced lower than buying the carburetors separately.
Choose your finish
The BIG97 Tri-Power is available in regular OE finish, Chrome, Black & Chrome and Barn Find – all from stock. Cable choke and LZ-style ‘push-throttle’ options are also available to special order. Click the tab (above) to read more.
55% more airflow
BIG97s make 55% more airflow than regular 97s - 750cfm for the Tri-Power, making it the perfect bolt-on for your smallblock Chevy or Ford. Cruise economically on the center Primary, then punch in the Secondaries when you step on the gas.
New power valve circuits improve fuel conditioning
Feeding top end enrichment directly into the emulsion tubes, the BIG97 Primary significantly improves fuel conditioning for more top end HP on less fuel.
New 'earlyplenum effect' boosts top end power
All three carbs allowing all cylinders to draw from both barrels giving you dual-plane drivability with a single-plane style top end horsepower.
Ported distributor vacuum
Switch inthe brass plug (supplied) and connect your distributor to improve combustion efficiency in cruising mode. You'll run smoother and cooler, with moretorque and better fuel mileage.
BIG S-jet twin-ball inlet valve
BIG97s accepts big diameter 5/16in hard line (regular 97s take only 1/4in line). BIG style Ford nut compression firings are available, and all our regular Stromberg fuel fittings - hose ends and banjos - all fit.
All Genuine97!
Everything that makes the Genuine Stromberg 97 so popular is built into the all-new BIG97 Tri-Power. From the cast iron base to the reinforced air horn casting and everything inbetween. Note: As with regularnew 97s, original hand throttle parts are not included.
Runs out of the box
BIG97s come ready to run, with a wide range of jets and power valves available for special tuning to suit your individual application. Every BIG97 comes with full installation instructions and you can find more help on our Tech Center.
- BIG 750cfm airflow - 55% more thanregular 97s
- Signature 97 outside shape - No change!
- New power valve circuits improve fuel conditioning
- New 'early plenum effect' boosts top end power
- Ported distributor vacuum adds mid range torque
- Runs out of the box. Pre-jetted for typical SBC/SBF
- Progressive linkages available with cable throttle and kickdown options
- Classic 3-into-1 fuel line available for SBC
