Whistling sound

D

DeadMaster

Member
Location
Canada, Vancouver, BC
Car
2006 FX35
Has anyone with the same set-up experience the same sound after installing the plenum spacer?
Stillen CAI+Z-tube/Kinetix HFC/Invidia exhaust + MD copper iso thermal plenum spacer.

So i installed MD 5/16 copper iso thermal plenum spacer yesterday, noticed a very distinct sound like whistling when i rev the car.
No engine light, drove the car about 100km today. The sound i don't mind as long as it has nothing to do with leaks or anything.
I have also read the thread about this on here & on 350z forum.
Upon looking at it closely today, i opened the engine bay and stepped on the gas the whistling sound i believe is coming from my CAI kit.
I do have Stillen CAI + Z-tube, also the sound seems to be coming from the power duct. I did put back the power duct(OEM) connecting to the rubber heat shield that the kit came with.
should i be worried or is this normal?
I hope someone with the same set-up can shed some light on this small issue, thanks in advance.
 
Did you not hear the whistling when you had the stillen cai installed. Most aftermarket intakes will make the whistling sound, it's just cause more air is being sucked in. No harm at all
 
So i checked everything today and re-torque everything again. It seems like there is no leak anywhere, checked also all the hoses.
What i noticed after taking off the engine cover though is that the upper plenum connection to my CAI system was a bit off so straightened that out and re-tightened.
The sound is still there but i'm 100% sure it is coming from my power duct into my CAI cone.
The noise is still there but it is a bit toned down, more of a sucking air noise now which to me seems normal just more pronounced after the plenum spacer install.
Did call MD in regards to this issue, they said half or so of the guys that install it has the same issues and it has nothing to do with leaks.
The MD kit i bought also has the Mrev2 that came with it.
 
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