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

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. 

Additional Note - There are NO vacuum ports on these carbs so you may need to tap into the manifold for a vacuum source. 

• Overall Height - 11 7/16" total from the bottom of the adapter to the top of the air cleaners.
• Adapter manifold top 3x2 dimension is 4” wide by 13-11/16” long
• Adapter manifold is 2-3/16” tall bottom to top without the gaskets
• 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
• Progressive linkage included
• It does NOT come with the intake manifold to adapter gasket. 4 Barrel Carburetor Base Gasket

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.

• 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® 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® Linkage Instructions (PDF)

915-11657 9 Super 7® Carb Instructions (PDF)

Multiple Carburetor Tech Tip (JPG)