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Product Summary

Two Carburetor Quantity, 2-Barrel Carburetor Barrels

  • This kit uses the Edelbrock Slingshot intake manifold along with 9 Super 7 carbs
  • Kit includes two carbs, the intake, air cleaners, linkage kit, fuel block, fittings and red fuel line
  • Assembly required
  • On the primary 9 super 7 carb the throttle shaft extends from carb body .983" and has the hole on the end to pin the linkage
  • For 1938-48 Ford/Mercury Flathead

Comes as a Kit

Key Specs

MFG. Part #9251250
BrandSpeedway Motors
Carburetor QuantityTwo
Carburetor Barrels2-Barrel

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Speedway Motors 9251250 Details

This kit uses the Edelbrock Slingshot intake manifold along with 9 Super 7® carbs. Kit includes two carbs, the intake, air cleaners, linkage kit, fuel block, fittings and red fuel line. Assembly required.

The 9 Super 7® Carb  makes setting up a multiple carburetor induction system easier than when Strombergs were available new. All that's required to do so with our kits is aUni-Syn syncing tooland a little patience. Be sure to include theSecondary 9 Super 7®when installing 3-carb setups. Our 3 Carb kits come with one primary carburetor and two secondary carburetors while the 2 Carb kits are both primary carbs.  See our  for more information on using the 9 Super 7® in a 2x2 or 3x2 carb set-up. 

On the primary 9 Super 7® carb the throttle shaft extends from carb body .983" and has the hole on the end to pin the linkage. There is a brass sleeve that the throttle shaft rotates in that extends from the carb body .400 and this leaves the useable throttle shaft length of .583. There is sufficient room for progressive linkage and the manual throttle linkage that rotates over the sleeve. 

  • For 1938-48 Ford/Mercury Flathead
  • Includes assembly hardware and gasket
  • 7-3/4" tall
  • Manifold height: A-7.75", B-7.75"
  • Port exit dimensions: 1.3" x 1.7"
  • All-new tooling for crisp, flawless castings
  • New aluminum base assembly allows for cooler fuel temps and better fuel efficiency as compared to the original cast iron design
  • Stainless steel screws and hardware
  • Original troublesome needle and seat replaced by a Grose-style fuel inlet valve to better cope with higher fuel pressures and improved high speed running 
  • Will not stick or dribble like the old Viton-tipped needle and seat setups
  • Extended brass throttle shaft to simplify multi-carb linkage

Note: Not recommended for use with Ethanol fuels.

9 Super 7® Primary Carbs -

  1. Features .045" main metering jets and a number 65 power valve, which is the same as a stock 97 carb.
  2. Replacement jet access plug gasket use # 91011542, replacement needle and seat gasket use # 91011543.
  3. Includes base gasket.
  4. The 9 Super 7® ® will operate suitably with fuel pressures ranging from 1-1/2 psi to 4 psi, with a desired setting of 2-1/2 psi to 3 psi. Fuel pressure from 4 psi to 7 psi will cause the carburetor to run excessively rich and may cause flooding. Flooding or leaks caused by excessive fuel pressure do not indicate a faulty carburetor.  A fuel regulator such as # 560-58500 must be utilized in order to keep proper fuel pressure at the 1-1/2 to 4 psi range.
  5. Our independent tests produced these flow numbers:
    • 3" of Vacuum - 60 CFM
    • 10" of Vacuum - 110 CFM
    • 15" of Vacuum - 136 1/2 CFM
    • 28" of Vacuum - 184 CFM

Learn more about setting up 3 x 2 carbs using the 9 Super 7® ® in Street Rodder Magazine's tech article Speedway Motors Stromberg 97 - Tri-Power In Under An Hour. 

See what other industry experts are saying about the 9 Super 7® ® here.

9 Super 7® Primary Carbs -

  1. Features .045" main metering jets and a number 65 power valve, which is the same as a stock 97 carb.
  2. Replacement jet access plug gasket use # 91011542, replacement needle and seat gasket use # 91011543.
  3. Includes base gasket.
  4. The 9 Super 7® ® will operate suitably with fuel pressures ranging from 1-1/2 psi to 4 psi, with a desired setting of 2-1/2 psi to 3 psi. Fuel pressure from 4 psi to 7 psi will cause the carburetor to run excessively rich and may cause flooding. Flooding or leaks caused by excessive fuel pressure do not indicate a faulty carburetor.  A fuel regulator such as # 560-58500 must be utilized in order to keep proper fuel pressure at the 1-1/2 to 4 psi range.
  5. Our independent tests produced these flow numbers:
    • 3" of Vacuum - 60 CFM
    • 10" of Vacuum - 110 CFM
    • 15" of Vacuum - 136 1/2 CFM
    • 28" of Vacuum - 184 CFM

Learn more about setting up 3 x 2 carbs using the 9 Super 7® ® in Street Rodder Magazine's tech article Speedway Motors Stromberg 97 - Tri-Power In Under An Hour. 

See what other industry experts are saying about the 9 Super 7® ® here.

 

Included in this Kit:

  • (1) Edelbrock 1103 38-48 Ford/Mercury Flathead Slingshot Manifold, 2 Carb
  • (2) Primary 9 Super 7 3-Bolt 2-Barrel Carburetor, Plain Finish
  • (1) 9 Super 7 Linkage Hardware
  • (1) Swedged Aluminum Throttle Linkage Tubes, 3/16 (10-32) Thread
  • (2) 97-Style Carburetor Fuel Inlet Fitting, 1/2 In-20 to 5/16 Hose, Chrome
  • (1) Two Outlet T-Style Chrome Fuel Block
  • (1) Red See-Through Fuel Line Hose, 5/16 Inch I.D. x 6 Ft.
  • (2) Helmet Style Air Cleaners
  • (2) 1 1/4" Carb Stud Kit Bag of 4
  • (1) Straight Chrome Fitting, 3/8 Inch Hose to 3/8 Inch NPT
  • (2) Straight Chrome Fitting, 5/16 Inch Hose to 1/4 Inch NPT
  • (1) 1932-1948 Ford Flathead Intake Gasket
  • (1) Stromberg 97-Style Center Carb Throttle Shaft Arm
  • (1) Stromberg 97-Style Extended Throttle Shaft Arm

Speedway Motors 9251250 Specifications

KEY SPECS
MFG. Part #9251250
BrandSpeedway Motors
Carburetor QuantityTwo
Carburetor Barrels2-Barrel
GENERAL
Carburetor Flange Type2-Barrel 3-Bolt
Choke TypeManual
Fuel TypeGasoline
Intake Manifold MaterialAluminum
Intake Manifold FinishNatural
Carburetor FinishNatural
Air Cleaner TypeRound Helmet Style
Air Cleaner FinishChrome
Overall Height16.427"
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