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$899.99
Pair of Primary 9 Super 7® 3-Bolt 2-Barrel Carbs, Chrome Finish
Pair of Primary 9 Super 7® 3-Bolt 2-Barrel Carbs, Chrome Finish

Pair of Primary 9 Super 7® 3-Bolt 2-Barrel Carbs, Chrome Finish

Universal Fit, 2 x 2-Barrel Carburetor Barrels, Gasoline Fuel Type, Manual Choke Type, Chrome

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Pair of Primary 9 Super 7® 3-Bolt 2-Barrel Carbs, Chrome Finish
Pair of Primary 9 Super 7® 3-Bolt 2-Barrel Carbs, Chrome Finish
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Part # 915116572
$899.99
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Carburetor Barrels:
2 x 2-Barrel
Fuel Type:
Gasoline
Choke Type:
Manual
CFM:
368 CFM
CFM Range:
300-399 CFM
Carburetor Flange Type:
2-Barrel 3-Bolt
Finish:
Chrome
MFG. Part #:
915116572
Gasket(s) Included:
Yes
Sold in Quantity:
Pair

Info

Speedway Motors now offers a reproduction version of one of the most popular carburetors ever used, the original Stromberg 97! Original equipment on 30s and 40s cars and trucks, the Stromberg 97 has long been favored by flathead hot rodders and racers who realized the performance qualities of this timeless fuel supplier.

There have been numerous attempts to reproduce this unit, with little success. "Speedy" Bill Smith of Speedway Motors in Lincoln, Nebraska, took on the challenge to make a great product even better. The 9 Super 7Ā® Carb brings this reproduction of the original Stromberg 97 2 barrel carb into the 21st Century!

Speedway Motors has incorporated all of the improvements shown above while maintaining the carburetors original look. Features such as the choke assembly, accelerator pump, main jets and cosmetics have all been faithfully retained. Additionally, each carburetor is individually flow tested and inspected for leaks. Perfection is the result!Ā 

Aesthetically, the 9 Super 7Ā® is nearly identical to the stock unit, minus the large 97 logo that appeared on the side and the patent numbers found on the float bowl area. Upgraded internal parts include; the float, needle, and seat. Jetting and power valve settings remain as they were for the original 97 carbs as well as the cfm and vacuum specs.

The other similarity that the 9 Super 7Ā® shares with the original 97 is the setup and tuning necessary to yield a well-running machine. While perhaps not as simple as bolting on a single four-barrel, the 9Super7 makes setting up a multiple carburetor induction system easier than when Strombergs were available new. All thats required is an intake, a linkage system, a Uni-Syn syncing tool, and a little patience. Be sure to include the Secondary 9 Super 7Ā® when installing multi-carb setups. Our 3 Carb kits come with one primary carburetor and two secondary carburetors while the 2 Carb kits are both primary carbs.Ā  See ourĀ Multiple Carburetor Tech TipĀ for more information on using the 9 Super 7Ā® in a 2x2 or 3x2 carb set-up.

On the primary 9 Super 7Ā® 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.Ā 

  • 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
  • Choke assembly, accelerator pump, and jets have all been faithfully retained and accept standard Stromberg parts
  • Features original Stromberg 0.97" venturi diameter
  • Modern Nitrophyl float and Neoprene gaskets
  • Original troublesome needle and seat replaced by a Grose-style fuel inlet valve to better cope with higher fuel pressures and improved high speed runningĀ 
  • Will not stick or dribble like the oldĀ Viton-tipped needle and seat setups
  • Grose-style jet valve wont corrode in modern fuel, something the original needle and seat units cant do
  • Comes with a No. 65 power valve and 0.045" main jets, identical to the stock 97
  • Extended brass throttle shaft to simplify multi-carb linkage
  • Perfect for use with our dual carb intake manifolds for Ford Flatheads

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

Note: Not recommended for use with Ethanol fuels.

Recipient of the NSRA 2009 Best New Product Award
Recipient of the Goodguys Best New Product Award - Engine and Transmission, Goodguys PPG Nationals 2009

Notes

  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 gasketĀ use #Ā 91011542, replacement needle & seat gasketĀ use # 91011543.
  3. Includes base gasket.
  4. The 9 Super 7Ā®Ā 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.Ā  A fuel regulator such as #Ā 560-58500Ā must be utilized in order to keep proper fuel pressure at the 1-1/2 to 4 psi range.
  5. ThereĀ areĀ no provisions for a vacuum advance line. Ford & 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 7Ā® inĀ Street RodderĀ Magazine'sĀ tech article, Speedway Motors Stromberg 97 -Ā Tri-Power In Under An Hour.

See what other industry experts are saying about the 9 Super 7Ā®Ā 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.
  • Primary 9 Super 7® 3-Bolt 2-Barrel Carburetor, Chrome Finish
    Qty x 2

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