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Three Plain 9 Super 7® Carbs to 4-Bbl Intake Manifold Adapter Kit
Three Plain 9 Super 7® Carbs to 4-Bbl Intake Manifold Adapter Kit

Three Plain 9 Super 7® Carbs to 4-Bbl Intake Manifold Adapter Kit

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Three Plain 9 Super 7® Carbs to 4-Bbl Intake Manifold Adapter Kit
Three Plain 9 Super 7® Carbs to 4-Bbl Intake Manifold Adapter Kit
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Part # 9251180
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MFG. Part #:
9251180

Info

This tri power kit allows you to put three Speedway 9 Super 7® carbs on your standard 4 bbl intake manifold. It includes three carbs, the adapter, air cleaners, progressive linkage kit, fuel block, fittings and red fuel line. Assembly required. 

Note: Kit will NOT work with HEI distributors due to clearance issues. This system must be used in conjunction with a small diameter based distributor. 

  •   4 barrel bolt pattern is 5-1/8” side to side and 5-5/8” front to rear
  •   2 barrel bolt pattern is 3-1/4” side to side by 1-7/8” front to rear
  •   Adapter manifold is 2-3/16” tall bottom to top without the gaskets
  •   Adapter manifold top 3x2 dimension is 4” wide by 13-11/16” long

The 9 Super 7® 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 Multiple Carburetor Tech Tip for more information on using the 9 Super 7 in a 2x2 or 3x2 carb set-up.

  • 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.

9 Super 7® Linkage Instructions (PDF)

915-11655 9 Super 7® Carb Instructions (PDF) 

Notes

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 & 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. 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.

Some parts are not legal for use in California or other states with similar laws/regulations

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What's In The Kit

Each kit from Speedway Motors is carefully packaged and delivered right to your door. Below is a list of all the items you should expect to receive when you order this kit. Some of these items may also be available for sale individually if you're here looking for replacement parts.
  • Three 2 Barrel Carbs to 4 Barrel Intake Adapter
    Qty x 1
  • 3 x 2 9 Super 7 Linkage Kit
    Qty x 1
  • 3 1/2" Single End 3/16" Tube
    Qty x 1
  • Progressive Slide Link
    Qty x 1
  • 9.5 Inch Swedged Aluminum Throttle Linkage Tubes, 3/16 (10-32) Thread
    Qty x 1
  • Primary 9 Super 7® 3-Bolt 2-Barrel Carburetor, Plain Finish
    Qty x 1
  • Red See-Through Fuel Line Hose, 5/16 Inch I.D. x 6 Ft.
    Qty x 1
  • 97-Style Carburetor Fuel Inlet Fitting, 1/2 In-20 to 5/16 Hose, Chrome
    Qty x 3
  • 1 1/4" Carb Stud Kit Bag of 4
    Qty x 3
  • Straight Chrome Fitting, 3/8 Inch Hose to 3/8 Inch NPT
    Qty x 1
  • Straight Chrome Fitting, 5/16 Inch Hose to 1/4 Inch NPT
    Qty x 3
  • Speedway Three Outlet T-Style Chrome Fuel Distribution Block
    Qty x 1
  • Helmet Style Air Cleaners
    Qty x 3
  • Stromberg 97-Style Center Carb Throttle Shaft Arm
    Qty x 1
  • Secondary 9 Super 7® 3-Bolt 2-Barrel Carburetor, Plain Finish
    Qty x 2
  • Stromberg 97-Style Extended Throttle Shaft Arm
    Qty x 2

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