DL carb vs Stromberg 48

FrankWest

FrankWest

Well-known member
Is the difference very noticeable going from a DL Carb to a Stromberg 48 Carb on a model B 4 cylinder engine.
 
Not familiar with Detroit lubricator cfm, but a 48 would be too big.
A guide to sizing
81 carb CFM 125
97 carb. 135
92 carb. 142
48. Carb. 150
94. Carb. 155
8ba. Carb. 162
 
my4dv8 said:
Not familiar with Detroit lubricator cfm, but a 48 would be too big.
A guide to sizing
81 carb CFM 125
97 carb. 135
92 carb. 142
48. Carb. 150
94. Carb. 155
8ba. Carb. 162
Click to expand...

This is interesting; where did you get these numbers? e.g. I thought an "8BA" was exactly the same as a "94". Maybe a 2100/2110 is 162 CFM? Some of the others don't jibe with what I seem to remember, either.
 
Those numbers ain't right, they don't tally with others I seen published.
I think the change from the DL to a 48 would be quite noticeable. Also think the 48 would be a good size, defiantly not to big.
Martin.
 
I wasn't convinced but thought Ok I Read these other ratings on the web so they must be right.
Here are some different numbers to confuse things.
Well if Tex Smith is correct he states the CFM rating is from original manufacturers engineering test data while the variation is from teats on modern flow testing equipment.
Stromberg 48 cfm. 167 to 182 Rating 175
Stromberg 81. Cfm. 130 to 142. Rating 135
Stromberg 97 Cfm. 144 to 155. Rating 150
Holley. 92 Cfm. 140 to 155. Rating 142
Holley. 94 Cfm. 150 to 158. Rating. 155
Holley 8BA. 158. To 165. Rating. 162
Holley. ECG. 184 to 190. Rating. 185
Still I suppose the can be disputed too,so I stand corrected if someone has better flow numbers.. I didn't think an ECG flowed that much.

my4dv8 said:
Not familiar with Detroit lubricator cfm, but a 48 would be too big.
A guide to sizing
81 carb CFM 125
97 carb. 135
92 carb. 142
48. Carb. 150
94. Carb. 155
8ba. Carb. 162
Click to expand...
 
Last edited:
I seem to remember that those there numbers were got from testing at 1.5" not the normal 3" used to flow test 2bbl carbs. 4bbl are flowed at 1.5".
Due to this, these numbers are really only useful for comparing with the carbs in this list, ie compare a 97 to a 94 and such. And no good for comparing with other 2bbl carbs.
Martin.
 
If you mean what you state that your question is regarding carburetion for a Model B four-cylinder engine, the starting point for comparison purposes is a Zenith updraft carburetor, not a Detroit-Lubricator V-8 single barrel downdraft carburetor.
 
Could be on to somit there David, I had assumed that he had a down draft manifold already on it with a Detroit lubricator, and he was gonna plop a Stromberg on there.
Martin.
 
This thread needs to be shot. Start it over with a picture of actual carb on engine or other real identification, add in some correct Stromberg stuff, rebuild!
 
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