Re: MOVED: What The Heck Did This Guy Do?
Normally, the IAC is attached to the intake before the TB. This allows the IAC solenoid to allow air into your intake manifold when the TB is closed so that the car will idle correctly. Normally, the IAC never sees positive pressure; only vacuum or atmospheric pressure. When you add a turbo to the car, you are introducing positive pressure to the intake piping. When you close your throttle under boost, there is a pressure spike in the piping. This spike is what opens your BOV. If the IAC is still attached to the intake, it's possible for this spike to damage the IAC over time. To prevent this, you can disconnect the hose and add a filter to the IAC so that your motor only ingests filtered air.
BTW, this is only needed on a car with forced induction. Doing this to an NA car will not benefit you. That being said, I'll move this to FI.
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Aaron Britt
'06 350Z (Farking lemon)
'06 Elantra GLS hatch
'87 Nissan Hardbody - The "Mud Mobile" (448,000 miles and still counting)
'02 Derbi GP1 scooter
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He's got a breather filter on the idle air controler thing. Is there any benefit/side effects to doing such as he did? I see he did it to put new piping directly up to the throttle body. Then I take it, he prolly just slapped another breather filter on the other tube (I forgot what it's called) that recirculates gasses back into the intake?
Linear Mode
