Newbie GT wrote:Hi guys
After looking at removing resonator from air box I have some questions
1. After removal of resonator the air box is left with a big hole in the bottom of it. Wouldn't this suck or bring dirt into air box as it's not sealed as it was with res bottle attached?
2. Noise is increased very slightly ?
Curious on your thoughts as it seems like a few more cons than pros
What are the cons?
You have to understand, the airbox already has one hole letting air into it (over the radiator), this is just opening up another. Both are before the air filter - which will do exactly as designed, and will filter out any particles (well, most particles, there are limits) before they enter the engine. Because there's not much (if any) airflow into the area under the airbox, the air sucked in via that hole will be relatively minimal (it's a low pressure area, the higher-pressure intake over the top of the radiator will supply the vast majority of air into the airbox).
So your engine is no more likely to ingest particles with the resonator removed than it is with it in place.
The biggest issue would be if you were to drive into a deep (stupidly deep, it'd have to be up over the intake over the radiator) puddle, where you could, in theory suck water into the engine - but that'd be an issue without the resonator as well. And to be clear here - even if you drove into a puddle that came right up to the bottom of the airbox, the intake isn't going to suck water in - because the over-the-radiator path is sufficient to provide enough airflow for the engine. And because the MAF is at the top of the airbox, I reckon you could probably park the car in a puddle that covered the bottom half of the airbox entirely (let's ignore the issues for the rest of the car, like flooding the passenger compartment) and rev the tits off the engine and it STILL wouldn't suck water in. Basically, there's insufficient air flow resistance in the standard air path to overcome the pressure required to suck the water in from the bottom, so really, you're not terribly likely to actually suffer hydra-lock either, because there's another, easier path for the engine to suck air into the engine.
Why is the resonator even there to start with? The name of it gives a clue - to reduce intake path resonance. Removing it means you'll hear some more noise (and you do) - whether or not you consider the noise to be obtrusive or undesirable is entirely up to you. And if you don't like it, you can easily either just block off the hole on the bottom of the airbox, or simply put the resonator back on the car - removing it isn't a permanent modification.
I think you're over-thinking this one Newbie.
