Stromberg Big 97 Primary Carb Plain 250Cfm 9510A-BIG-P
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The BIG97 Primary features250cfm airflow withsignificantly improved fuelcircuits, and provides portedvacuum for your modernaftermarket distributor. Itcan be used on its own, inmultiples (with direct orprogressive linkage) or aspart of the BIG97Tri-Power.
55%more airflow
BIG97s move up to a 1.175inventuri with super-efficient20 degree entry angles. Theaccelerator pump dischargejets are smaller and well outof the booster airflow. Andflared exit cones build powerby slowing the mixture down toreduce turbulence into themanifold plenum. The result?250cfm percarburetor.
Newpower valve circuits improvefuel conditioning
Feeding top end enrichmentdirectly into the emulsiontubes, BIG97 Primariessignificantly improve fuelconditioning for more top endHP on lessfuel.
New 'earlyplenum effect' boosts top endpower
Allowingall cylinders to draw fromboth barrels gives youdual-plane drivability with asingle-plane style top endhorsepower.
Ported distributorvacuum
Switch inthe brass plug (supplied) andconnect your distributor toimprove combustion efficiencyin cruising mode. You'll runsmoother and cooler, with moretorque and better fuelmileage.
BIGS-jet twin-ball inletvalve
Acceptsbig diameter 5/16in hard line(regular 97s take only 1/4inline), plus regular Strombergfuelfittings.
AllGenuine 97!
Everything that makes theGenuine Stromberg 97 sopopular is built into theall-new BIG97. From the castiron base to the reinforcedair horn casting andeverything inbetween.
Runsout of the box
BIG97s come ready to runwith the following jetting(see below). As with anycarburetor, rejetting may berequired for otherapplications, high altitude,local gas, ethanol content andmore. A wide range of jets andpower valves isavailable.
BIG97Primary jetting:
Main jets 0.056in Powervalve #65 Accelerator pumpvalve #60 Note: This jettingis designed for Primary use aspart of the BIG97 Tri-Power.Smaller jetting will berequired when using BIG97Primaries inmultiples.
- AllGenuine 97 on theoutside
- Totally new onthe inside
- BIG 250cfmairflow - 55% more than aregular 97
- New powervalve circuits improve fuelconditioning
- Newearly plenum effectboosts top endpower
- Porteddistributor vacuum addsmid-range torque
- BIGS-jets accept 5/16in hardline
- Runs out of thebox