Could my Accufab 80mm be whistling bc I have a 94/95 IAC on it?

I just thought I'd let you know I swapped my fox IAC for a SN95 IAC tonight for testing purposes. It didn't squeal, but it made other horrible noises. The car seemed to run a little better(smoother), but I can't stand the noises it makes so the Fox IAC is back on there.
 
It's a weird noise, kind of like a low pitched hum. It almost sounds like bearing going out in the fan or alternator, but it's coming out of the intake. After looking at your pics in the dyno thread I think I mounted it the opposite way as you. I had to wire plugin on the bottom next to the valve covers.