Chrome 9 Super 7® 3x2 Carb/Intake Manifold Kit, 1957-86 S/B Chevy
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This tri power kit uses the Edelbrock C-357-B S/B Chevy 3x2 intake with Speedway's 9 Super 7® carbs. It has progressive linkage to give you good driveability and economy, but power when you need it. The manifold has a balanced 180° firing order port runner arrangement. It contains an exhaust gas heat riser and offers excellent performance potential. (idle-5500 rpm)
Kit includes three chrome plated carbs, the plain finish aluminum intake, 4" chrome air cleaners, linkage kit, chrome fuel block, fittings and red fuel line. Assembly required. Fits 1957-1986 Chevy 262-400 c.i.d. small-block Chevys.
Note: Not applicable to an HEI based distributor system due to a clearance issue. This system must be used in conjunction with a small diameter based distributor.
The 9Super7 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.
- Features .045" main metering jets and a number 65 power valve, which is the same as a stock 97 carb.
- Replacement jet access plug gasket use # 91011542, replacement needle & seat gasket use # 91011543.
- Includes base gasket.
- The 9Super7 ® 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.
- 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
- Carb center-to-center: 5-1/2".
- Port exit dimensions: 1.12" x 1.87"
What's In The KitEach 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.
Edelbrock 5418 Small Block Chevy 3x2 3-Bolt Carb Intake ManifoldPart # 3255418Qty x 1
9.5 Inch Swedged Aluminum Throttle Linkage Tubes, 3/16 (10-32) ThreadPart # 94055301-9.5Qty x 1
Progressive Slide LinkPart # 1356686Qty x 1
3 1/2" Single End 3/16" TubePart # 1356688Qty x 1
3 x 2 9 Super 7 Linkage KitPart # 1356723Qty x 1
97-Style Carburetor Fuel Inlet Fitting, 1/2 In-20 to 5/16 Hose, ChromePart # 91611066Qty x 3
Red See-Through Fuel Line, 5/16 Inch I.D. x 6 Ft.Part # 91011449Qty x 1
Primary 9 Super 7® 3-Bolt 2-Barrel Carburetor, Chrome FinishPart # 91511657Qty x 1
1 1/4" Carb Stud Kit Bag of 4Part # 13559Qty x 3
Straight Chrome Fitting, 3/8 Inch Hose to 3/8 Inch NPTPart # 91611058Qty x 1
Straight Chrome Fitting, 5/16 Inch Hose to 1/4 Inch NPTPart # 91611048Qty x 3
Speedway Three Outlet T-Style Chrome Fuel Distribution BlockPart # 5506151Qty x 1
Tri-Bar Wing Nut Style Air CleanersPart # 91011018Qty x 3
Speedway Small Block Chevy Intake Gasket Set, 1204 Style, StandardPart # 91010206Qty x 1
Stromberg 97-Style Center Carb Throttle Shaft ArmPart # 5606181Qty x 1
Secondary 9 Super 7® 3-Bolt 2-Barrel Carburetor, Chrome FinishPart # 91511658Qty x 2
Stromberg 97-Style Extended Throttle Shaft ArmPart # 5606180Qty x 2
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There's a right and wrong way to run a two-barrel carburetor on your vintage engine. Check out this guide about how to select the correct carburetor for your Flathead or vintage engine.