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A 1600 Alfa Romeo with 40 DCOEs and hotter than stock cams will easily develop well over 140 hp
They'd be little ponies.
Correctly set up, 40s should be sufficient for any B20 short of an all out sprint racer or hillclimb engine.
LOL! I noticed the difference with mine when I went from 45mm Webers to 48mm Dellortoes & it wasn't that special, I was still using standard valves.
40's are enough for a B20E, or a B20B with a bit of a cam in it, but once you do some headwork, build some headers & stick in a decent cam, 45's are mandatory.
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