djsquare

I noticed a "whoosh" sound when I revv my engine. It happens right when you hit the throttle but before the RPM's go up.
Check out the youtube video to see what I mean.

Is this normal?
I did remove the baffles and fins on my stock air box, as well as a throttlebody port and polish. It sounds like its coming from the rear of the intake manifold but can't confirm that just yet.

Revving:
Here's just a video of it idling, I'm showing misfires on my scanner so just wanted to see if you hear anything out of the ordinary. Sorry for the crap audio quality.

Idle:

djsquare

You'll notice I was trying to focus on the small gap on the one side between the throttlebody and intake manifold, but I sprayed carb cleaner all over it and no change in idle so there shouldnt be a vacuum leak there.

Mappinsj

Is the sound of the air forcing around the throttle plate, nothing wrong there just normal

djsquare

Awesome, much appreciated! I don't have any LS1 friends in my area to compare.