Quote:
Originally Posted by blsfrs
Generally speaking, velocity stacks are used directly over a throttle body where straightening out the air flow would be very beneficial.
Our "trumpet" pulls in air which then makes a 90* turn and runs into the filter. Is this design more for efficient air flow or more for noise abatement?
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On a Formula 1 car the front wing controls airflow over the entire vehicle to the point where it radically alters the performance of the rear wing. It seems to me very likely that the trumpet could affect flow stability into the mass air sensor even after making two ninety degree turns. Without CFD software analysis from Toyota, it's pure speculation on what exactly it accomplishes. But since I don't see any evidence that it acts as a restriction on a stock engine, attacking it with a Dremel in an attempt to "improve" the work of a factory engineering team seems kinda dubious. Might as well drill holes in your airbox while you're at it.