Does anyone know what the vaccum switch on the right hand side of the airbox does? is it relative to the variable volume induction system?

Need to learn as much as possible about the stock box and its limitations

Cheers

 

variable volume induction system...
i thought the switch opened up a valve in the resonator box for more air, and controlled the actuator over on the intake manifold (driver's side), opening up the secondary runners.

 

Thats confirmed my guess, but it cant controll the 2ndary runners in the intake plenum as it has a single vaccum hose! (waht controlls the 2ndary intake runners?)

but I think your right in saying it opens a valve in the resonator box but what do people attach this vac. line to when they fit an aftermarket one or do they plug it?

And this bring me to a serious question...
Why would people replace this airbox system in which Honda spent time and 'engineered' it to improve Low-end responce and mid-range torque?
...do aftermarket ones gain high up only and lose low-end torque?

Anyone?

 

i think the vacuum line goes to a box (from the vacuum wiring guide if i remember) and the secondary runner valve also taps into that box.

when i fitted my intake, i capped off the vacuum line which previously had gone to the switch on the resonator. therefore I am guessing that the control box (by the battery?) will see a vacuum and tell the manifold that the intake is pulling in all the air it can.

i don't know why we would change anything honda engineers spent much resources perfecting, but we do it anyhow.

 

Honda engineered it not only for a little more torque down low but to also make the intake quieter...I still think the best intake mod is to just remove the resonator & drop in a K&N filter...

 

... and then insulate that whole side of the bay with reflective stuff.