im building up a 60 over Studebaker 289 for my 52 commander, "the maggot". im debating whether or not to try and run a similar induction setup to what was originally on the car, a 2bbl intake and a stromberg. i already have a ralph evans single plane, a holley 650 dp, a big regound cam, and small chamber heads with big valves. i know the new big 97's flow 250 cfm, are there any other tricks to get more flow out of 2 barrel carbs? ive read about some guys adjusting the carb too rich, mounting the carb on longer than usual studs with springs, then adjusting the linkage to bind up and rock the carb off the base, making the entire carb body a big throttle plate, basically. i know running the 2 barrel would choke the motor off somewhat, but considering it would look "proper" in my mindset, could i still get this motor to perform well with a tiny stromberg?
The "97" (the original Stromberg designation type EE-1) was the older 3-bolt pattern. Until the AA series replaced the EE series, Stromberg used a 4-bolt EE-2 (or 6 bolt EE-3) if they wanted more CFM. Your Studebaker in 1952 would have been equipped with a type AA Stromberg 4-bolt. The type AA was superseded by the type WW on Studebaker in 1953. The type WW comes in a number of different internal venturii sizes. Studebaker used the WW on their supercharged V-8 in 1957. Even larger type WW were used on engines as large as 364 CID. Why consider a small "97" through an adapter, when you can use a technologically superior AA or WW of larger size without the adapter? Jon.
i was assuming that the big 97 would flow more, im having a hard time finding the ww or aa cfm ratings. i have noticed, in my searching, that the ww carbs came on gmc truck engines that were large. does anyone have a ballpark idea of what these can flow?
ok, upon inspecting it, its an AA with 1 5/16 bores, on top of 10 gaskets stacked. the intake itself has 1 7/16 bores. what can a stromberg aa with 1 5/16 bores flow? over 200 cfm?
Stromberg NEVER published CFM ratings! Period! Any ratings of Stromberg carburetors (or clones) are not official ratings. Thus are worth exactly whatever you wish them to be worth! The only carburetor company of which I am aware that published uniform CFM ratings before the 1960's was Zenith. The common reference to a carburetor size was "venturii area". You might find this link interesting: http://www.thecarburetorshop.com/Carbshop_carbsizesandCFM.htm As to the GMC carbs: The largest GMC engine with an ungoverned SINGLE WW was a 351. The 702 did use TWO type WW carbs. The GMC versions are MUCH rarer than those used by Chrysler and Buick, are generally VERY worn, and generally much more expensive than the Chrysler and Buick versions. Buick used the WW on the 364, Chrysler used the WW on the 361. And if there is a chart somewhere of all of the Stromberg WW's with corresponding venturii sizes, it was not published by Stromberg (I have custody of the Stromberg records). EDIT: you posted while I was typing. The throttle bore is NOT the most important criteria in airflow; the internal venturi size is the critical dimension. Jon.
A bit more information: As stated in my first post, the Stromberg "97" is really a Stromberg type EE-1. The original carburetor on your Studebaker was a Stromberg type AAUVB-26 The first number following the letters in a Stromberg carburetor type is the S.A.E. flange size (see link): http://www.thecarburetorshop.com/Strombergcodebreakdown.htm The EE-1 is a S.A.E. size 1 The AAUVB-26 is a size 2. AA series 2 Strombergs were used on V-8 engines from 233 to 356 CID. EE-1 series Strombergs were used on engines from 221 to 280 CID (good luck on finding one from a 280). Generally, there is a small raised fraction somewhere on the bowl casting of a Stromberg denoting internal venturi size. That fraction on a "97" is 31/32. Divide 31 by 32, and see what you get. By checking the fractions, one can compare the internal size of a Stromberg without having to disassemble and actually measure the internal venturi size. Jon.
thank you. so lets say i want to run this aa stromberg on a 60 over 289, with ported heads, big cam, high compression, and headers. its a 3 speed, 5.13 gears. suggestions on jets?
There are three different styles of jet used in the type EE. There are two different (and different from the EE) styles of jet used in the AA There are three different (and different from the EE and AA) styles of jet used in the WW. For the AA and WW, you MUST go by the carburetor identification number stamped on the carburetor to get the correct physical style. If you are planning on ignoring my previous post, and using the carb you have, two things: (1) The original jets are probably too RICH! (2) Look at the second line in my signature! Jon.
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