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anyone know the venturi sizes for 850 and 950? just curious here as i have what bigs performance calls a 950 stage 5+,but the main body is stamped 850 and has 1.400 venturi's.



A 1.40 is a fairly small venturi carb. Works well with smaller engines, or lower engine speeds. Nothing wrong with a 1.400 carb, you just need to match it up to the correct engine. Holley now has a 1.590 venturi in the new aluminum carbs. That carb really makes the power on a big engine.