Stromberg 48 vs 97

Anyone know what the main difference is? Read the threads and seems the 48's get a little more cfm.
Im running a Flatty with 4" Merc Crank (276cid) , Weiand Cheater Heads, Potvin 3/8 Cam,

Any help is appreciated. All opinions welcome. Thanks guys

 

48 = 180CFM
97 = 155CFM

We have several really knowledgeable guys on the board. You can direct your questions to UncleMax, Dickster27, Stromberg97.....I know there are others but just had a senior moment

 

my 276 runs best with 97"s and stock jetting. thaTS A 2X2 SET UP. 3x2 you mite get away with a 48 on the ctr carb

 

Stock--.046 jets and #63 pv for a 48, .045 jets and #65 pv for a 97. 97s have two settings for the accelerator pump lever, unless they have been bastardized. Ford actually advertised the 97 as an "economy carburetor" when introduced in April of 1936.

 

All my info states the Stromberg 48 had stock #48 main jets, with 1 1/32" venturis, while as stated, the 97 uses #45 jets and has 31/32" venturis. Most agree the "48" name is from it's jet size, while the "97" comes from it's venturi size of .096875, or .097.

 

Actually, the 48, when first introduced, took it's name from the '34 Ford Parts numbering system, which all began with 48. 48-xxxx and so on. (jet size was coincidental).

I sometimes build "hybrid" 48's... Using 97 style airhorns with the detent, and 97 style throttleshafts with two adjustment balls for easier tuning.

 

Hi Max,
I don't remember ever seeing the reference to 1934 numbering system concerning the 48 carb, but it makes perfect sense! Thanks for the info. Just one more "myth" corrected!

 

if you have a 97 , i would try it first . 48s are the biggest . then 97 , then 81 . . steve

 

What intake are you using how many carbs. With the build of your engine, 3x2 would work great with three 81s and running non-progressive linkage..With a basic formula of 1.5 CFMs per CI your engine could handle 400 + CFMs..Three 81s is about 420 CFMs, sounds like a good match to me..
Duane..

 

Running a Hexagon 2 x 2 Intake if it helps

 

My mistake.

 

Talk to Mr. Stromberg rickshelton@gasalleystreetrods.com He knows Strombergs. And was helpful to me!

 

http://www.jalopyjournal.com/forum/group.php?groupid=269



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Hello..Run two 97s non-progressive. I believe two 48s would be better..
Duane.

 

I was told to run 2 48s for the added cfm
Using a hexagon 2 x 2 intake

 

thanks for all the input guys
I was told the hexagon intake feeds cylinders in a different way than most flathead intakes. Just trying to turn stones and get some info.
All info is appreciated