Stromberg tri-power set up 750 cfm !

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All-new 750cfm BIG97 Tri-Power from Stromberg Carburetor

May 2015. New BIG97 makes traditional carburetion available to a new performance audience.
Stromberg Carburetor is excited to announce the all-new BIG97 Tri-Power. On the outside, it's all Genuine 97 - the original hot rod 3x2. But on the inside, an incredible 750cfm air flow makes traditional hot rod carburetion available to a whole new performance audience. Designed on the classic Primary/Secondary format with many new and exclusive features, the all-new BIG97 Tri-Power is the perfect bolt-on for your performance small block Chevy or Ford.

• BIG 750cfm airflow - 55% more air than regular 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
• Progressive linkages and classic 3-into-1 fuel line available
• Runs out of the box. Pre-jetted for typical SBC/SBF

Stromberg owner, Clive Prew said: "With 750cfm in a three-carb package on a progressive linkage, you can cruise economically on the single Primary, then punch in the Secondaries when you step on the gas. BIG97s reduce the level of vacuum the engine has to pull to get the air it needs, which promotes higher air/fuel density. They also reduce mixture velocity which allows that denser, fuel-heavy air an easier, less turbulent, turn into the inlet manifold. Coupled with improved fuel conditioning, it all adds up to more power for your rear wheels."
From the outset, Stromberg’s aim was to re-engineer the 97 venturi and throttle body to maximize airflow without changing the signature outside shape. But achieving as much as 250cfm per carburetor - some 55% more than a regular new 97 (at 162cfm) is only part of the story.
The BIG97 Primary carburetor has a new power valve, located in the fuel bowl. Feeding top end enrichment directly into the emulsion tubes, it significantly improves fuel conditioning for more horsepower on less fuel. How? Because the more it emulsifies the fuel, especially at high rpm when manifold pressure is low, the easier it is to atomize, distribute and burn. At the same time, an oval cut-out, just under the throttle plates ( Stromberg's 'early plenum effect' ) coupled with our recommended intake manifold modifications, boosts top end power by slowing the mixture down and allowing any cylinder to draw from both barrels.
BIG97 Primaries also come with a swap-in fitting to provide ported vacuum for your aftermarket distributor, improving combustion efficiency in cruising mode for more torque and improvements in fuel mileage too.
Finally, everything that’s made the Genuine Stromberg 97 so popular over the past ten years is built into the all-new BIG97: An early style cast iron base for low heat transfer. A reinforced air horn casting to eliminate warping and leaks. High tech gaskets. Stainless steel levers, linkage and springs. Original-style riveted throttle and choke shafts. And more.
Stromberg BIG97 Primary and Secondary carburetors are available separately or as a ready-to-run Tri-Power (one Primary and two Secondaries), with extra savings available on packages with Stromberg's exclusive Small Block Chevy linkage and fuel line.
Further reading on all of the new BIG97 features and benefits is available on the Stromberg Tech Center at www.stromberg-97.com: