Not Ranked
You are probably correct in saying they were cut for hood clearance, another case of someone doing a mod without thinking of the possible ramifications.
The signal in the secondary venturi is created at the bottom end nearest the butterfly/throttle plate, not at the top, however if the top end has been shortened & no attempt to radius the cut this will affect the signal as the air quality/flow will now be different at this point to when the aux venturis were longer. With the square cut the air entering the aux venturi at higher flow rates cannot make the right angle bend around the 'cut' & tries to make its own larger radius which has the effect of reducing the actual size.
Jac Mac
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