The BIG97 Primary features all of the typical 97 fuel circuits, though the power valve and accelerator pump circuits are significantly modified to improve fuel conditioning. It also provides ported vacuum for your modern aftermarket distributor (see more below). BIG 97 Primaries can also be used on their own or in multiples (with a direct or progressive linkage).
BIG97 Secondaries have no power valve or accelerator pump circuits. Dummy accelerator pumps retain the classic 97 look. Secondaries are designed ONLY for use in multiple carburetor systems, connected to a Primary model with a progressive linkage.
All three carburetors keep chokes, idle and transition ports for steady idle, a stable signal and good low throttle manners.
Everything that has made the regular ‘new’ Stromberg 97 so popular over the past ten years has been 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. A 97 logo and all the other correct markings. High tech cellulose/nitrile gaskets. Stainless steel levers, linkage and springs. Original-style riveted throttle and choke shafts. And more.
All three carburetors keep chokes, idle and transition ports for steady idle, a stable signal and good low throttle manners.
Everything that has made the regular ‘new’ Stromberg 97 so popular over the past ten years has been 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. A 97 logo and all the other correct markings. High tech cellulose/nitrile gaskets. Stainless steel levers, linkage and springs. Original-style riveted throttle and choke shafts. And more.