Quote:
Originally Posted by mav1178
Why do most aftermarket intakes do without resonators? To achieve max performance gains, with droning and emissions as secondary concerns.
http://www.ehow.com/info_12156112_ai...onator-do.html
The link talks about performance, but this also ties into the primary reason: stock ECU tune for maximum balance of performance/reliability/emissions.
OE intakes are designed that way for a variety of reasons, many are related to actual driving comfort of occupants in the vehicle from what we can hear/tell. A lot of aftermarket exhausts have annoying sounds at specific frequencies because of lack of sound tuning for this reason.
Just because it's TRD doesn't mean it's Toyota's aftermarket gift to this car.
-alex |
I think the only reason the FR-S has a resonator is because of the sound tube.
Be it a TRD intake or any other brand they don't have a resonator because these intakes delete the sound tube so there's no need for a resonator.
I can check with Toyota Corporate about this to make sure this is why the stock intake has a resonator.