Dunno if anyone has tried the Autolite/Motorcraft 2bbl on an Opel yet. IDK if they would even fit the Opel intake manifold.
Got to admit I know much more about Ford performance engines then Opels.
It is considered a very good carb by the Ford performance guys. And used in triplet and singly on modified Ford engines
instead of Holley's.
Here is some flow info for the various size 2100/2150 out there.
they are extremely plentiful at swap meets and still can be found in junk yards since
the were used from 1958 thorough about 1975 on various Ford and American Motors products.
Plus rebuilt ones are still available many places.
2V 2100/2150 at 3"Hg. Venturi size listed first. Food for thought:
0.98 = 190 CFM
1.01 = 240 CFM
1.02 = 245 CFM
1.08 = 287 CFM
1.14 = 300 CFM
1.21 = 351 CFM
1.23 = 356 CFM
1.33 = 424 CFM
In order to compare these carbs to 'metric' carbs, here is a conversion list. Remember that venturi size is not the same as bore size. In example, a Weber 32/36 has venturies of 26mm/27mm. The MC2100/2150 carbs have syncronous butterflies, just like the Weber 38/38 DGS carbs.
0.98 = 24.9mm/24.9mm = 190 CFM
1.01 = 25.6mm/25.6mm = 240 CFM
1.02 = 25.9mm/25.9mm = 245 CFM
1.08 = 27.4mm/27.4mm = 287 CFM
1.14 = 29.0mm/29.0mm = 300 CFM
1.21 = 30.7mm/30.7mm = 351 CFM
1.23 = 31.2mm/31.2mm = 356 CFM
1.33 = 33.8mm/33.8mm = 424 CFM
Autolite 2100 on left. Motorcraft 2150 (used later on emissions engines) on right.
The nice thing about these Ford produced carbs is that they were designed based on the Holley's and current tuning
parts like main metering jets, power valves and some other things from Holley
screw right into them.