Product Summary

Three Carburetor Quantity, Manual Choke Type, Satin

  • Not recommended for use with Ethanol fuels
  • Kit uses the famous Edelbrock 3x2 intake with Speedway's 9 Super 7® carbs for 1949 to 1953 Flathead Ford V-8
  • The progressive linkage gives you good drivability and economy as well as power when you need it
  • This kit includes three carbs, the intake, air cleaners, linkage kit, fuel block, fittings and red fuel line.
  • Assembly required

Comes as a Kit

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Key Specs

MFG. Part #925121
BrandSpeedway Motors
Carburetor QuantityThree
Carburetor Barrels3 x 2-Barrel
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Speedway Motors 925121 Details

This tri power kit uses the famous Edelbrock 3x2 intake with 9 Super 7® carbs. It has progressive linkage to give you good driveability and economy, but power when you need it. Includes three 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 a Uni-Syn syncing tool and a little patience. 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. 

  • For 1949-53 Ford/Mercury Flathead
  • Front 1-3/8" diameter oil fill
  • 1-1/4" road draft bosses and a raised fuel pump boss
  • Carb spacing is 5-1/8"
  • Manifold height: A-3.66", B-3.66"
  • Port exit dimensions: 1.3" x 1.7"
  • Three Deuce carburetor setups come with two "secondary" carbs for front and rear intake position and one "primary" carb for central/middle position
  • 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
  • Primary Carb - (1) Middle Position
    • Choke assembly, accelerator pump, and jets have all been faithfully retained and accept standard Stromberg parts
  • Secondary Carb - (2) Front and Rear Position
    • Special base plate with no idle circuits or choke linkage
    • Special butterflies and shafts installed
    • Works best with progressive linkage
    • Idle only off the center or main carburetor
    • No more plug foul

Note: The secondary carbs have NO choke, and they have NO idle system.

Note: Not recommended for use with Ethanol fuels.

Manufacturer Recommendations:

  • Use carb stud kit #8006: generator stud kit #8506

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.
  5. There are no provisions for a vacuum advance line. Ford and Mercury engines 1949-1953 using stock distributors will need an alternative place to connect the vacuum line.
  6. 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.

Charts

Speedway Motors 925121 Specifications

KEY SPECS
MFG. Part #925121
BrandSpeedway Motors
Carburetor QuantityThree
Carburetor Barrels3 x 2-Barrel
GENERAL
Carburetor Flange Type2-Barrel 3-Bolt
Choke TypeManual
Fuel TypeGasoline
Intake Manifold MaterialAluminum
Intake Manifold FinishSatin
Carburetor FinishChrome
Air Cleaner TypeRound Helmet Style
Air Cleaner FinishChrome
Sold in QuantityKit

Questions & Answers

1 Question • 1 Answer

Would this system work well on a car driven on the street? Does it idle well? Would it be tractable for street use assuming a moderate camshaft?

by Jason

• 10 years ago

1 answer

1 of 1 questions shown

Fitment

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

  • 255 Ford Flathead V8

  • 337 Ford Flathead V8

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