Speedway Motors Pair of Primary 9 Super 7® 2-Barrel Carbs, Dual Carburetors Kit

Description

These 9 Super 7 carburetors are built with 100% all new parts to ensure hassle free performance, Base assembly is aluminum instead of the original cast iron material to allow for cooler fuel temps and better fuel efficiency, The original troublesome needle and seat has been replaced by a Grose-style fuel inlet valve to better cope with higher fuel pressures and improved high speed running, A modern nitrophyl float and neoprene gaskets are used to accommodate modern fuels, The choke assembly, accelerator pump, and jets have all been faithfully retained and accept standard Stromberg parts
Pair of Primary 9 Super 7® 3-Bolt 2-Barrel Carbs, Plain Finish
Sku # 915116552
Mfr. Part # 915116552
Condition
New
Brand
Speedway Motors
Sold
Kit
Details
Notes
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 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.
There are 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.
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® .
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 7® 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!
Aesthetically, the 9 Super 7® 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 7® 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 9 Super 7® 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 7® 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. See our Multiple Carburetor Tech Tip for more information on using the 9 Super 7® in a 2x2 or 3x2 carb set-up.
On the primary 9 Super 7® 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.
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 running
Will not stick or dribble like the old 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
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
Charts
(PDF)
Specs
Sold in Quantity
Pair
Finish
Natural
Choke Type
Manual
Fuel Type
Gasoline
Carburetor Flange Type
2-Barrel 3-Bolt
CFM
368 CFM
Carburetor Barrels
2 x 2-Barrel
New or Remanufactured
New
Gasket(s) Included
Yes
CFM Range
300-399 CFM
MFG. Part #
915116552
Secondary Type
None
Reviews
Great set of primary carbs
Rated
by Adam12 on September 01, 2020
Summary:
Worked great
Yes, I recommend this product.
yes but i hope i don't have to
Rated
by Opie on May 12, 2020
Summary:
they are working well for now that i got one of them to stop leaking
Yes, I recommend this product.
Looks good
Rated
by Me on February 19, 2020
Summary:
Look good
Yes, I recommend this product.
Smooth and easy!
Rated
by Lukedrywalker on May 27, 2017
Summary:
I bought these after my dad gave me his 1939 Ford coup. It had been sitting in his barn for 7 years due to his health and the carbs he had on there were totally plugged up. I was in a rush to get it running and decided to order a set of these carbs to run until I have a chance to rebuild a set of stock 97"s. I also purchased the synchronize tool along with these carbs. It was so easy to set these up I was shocked!!!!!! bolt them on, synchronize them, hook up linkage and go. I'm running a offenhouser dual intake and offenhauser 400 heads and these carbs are perfect. the only complaints are 1: they look to new on my engine and 2: some of the parts are kind of flimsy. They are what they are.
Pros:
Easy To Set Up
Yes, I recommend this product.
Really nice product
Rated
by builders77 on October 29, 2014
Summary:
Fit well on my application very well made. I am happy with my purchase.
Yes, I recommend this product.
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Offenhauser 1075 1949-1953 Ford Flathead Regular Dual Intake Manifold
Offenhauser 1073 1942-1948 Ford Flathead Super Dual Intake Manifold
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About
Speedway Motors is America’s Oldest Speed Shop® and has been a trusted source for specialty rodding and racing products and friendly expert advice for more than 69 years. Founded in 1952 by “Speedy” Bill Smith – a racer and street rodder himself – Speedway has grown from a one-man operation to become the world’s largest manufacturer, distributor and retailer of street rod and racing products. Our industry-leading fast delivery is the result of same-day shipping from our state-of-the-art, centrally located 500,000 sq. ft. headquarters. Speedway’s size offers customers unmatched product selection and low pricing, while our excellent technical support and customer service have made us a recognized leader in the rodding and racing industries.
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