So everybody says that the AEM intake "whistles". Well my short ram whistles and so does my stock intake...all at partial throttle at low rpms (<5000 rpm). What causes this? Should I be concerned that even with the stock intake, it whistles?

Mind you the short ram whistles much louder and easier (to produce).

 

might have a vacuum leak somewhere other than the intake itself. i have a supercharger and where the supercharger bolts onto the intake manifold, there was a leak... well you heard a whining, whistling noise... i say check for a leak where the throttle body meets the IM and where the IM meets the head. Then check the exhaust side...

 

It is just the air going past the half open butterfly....happens on stock too, but the stock filter and box do a better job of muffling it. Some people say that you can try to fiddle around with the throttle adjustment to fix it, but I have not tried.

 

I've also heard it on the stock box. Just curious, what short ram are you running?

 

I get that whistling sound on my AEM.

 

Agreed, I've heard this from my car since day one!

 

That's what I thought, it's totally normal. The short ram intake I am running is just a generic filter on a stick (it came with the car when I bought it used). But now, I'm running the stock box with K&N filter.

 

I've tried playing with the throttle adjustment screw to get rid of the whistle. I marked where it was before I fiddled with it so I could put it back to the original position if I needed to. I found just turning it 1/4 turn either way would would get rid of the noise, however, I felt it affected the car's power. In the end, I just left it where it was and went back to the stock rubber arm with stock filter and an icebox. Noise is still there but very muted using the stock arm. Try playing with the throttle screw and see if it helps you. Just make sure to mark it before you start moving it around. Good luck. Let's hear what your results are.