Is it normal to hear a "sucking" noise with the 6637 filter?

[Gunther482]

Hi. I just installed a 6637 filter on my 7.3 and besides a noticeable performance improvement it also creates this "sucking" noise. I was wondering if this is normal.

I've checked the clamps a few times for tightness and haven't found any that were loose.

And it isn't turbo surge that's making the noise, it kinda sounds like a vacuum.

[a.alford]

6637 are loud, no worries

[dieselcrawler]

that's normal... with the stock air box, the sound of the air flowing is muffled, so with the 6637, aside from the fact that the CFM ability is increased almost 3 times, there's no air box to muffle the sound.

[Gunther482]

Alright. It's pronounced when it shifts, kind of sounds like a blow off valve almost. Or if I give it some pedal at highway speeds I can hear the air being sucked in.

I figured it was normal, I was just making sure.

[a.alford]

In all honesty I can't hear mine at all, I noticed no change in sound. But maybe I just can't hear it over my stacks. lol

[85_305]

Originally Posted by Gunther482

Hi. I just installed a 6637 filter on my 7.3 and besides a noticeable performance improvement it also creates this "sucking" noise. I was wondering if this is normal.

I've checked the clamps a few times for tightness and haven't found any that were loose.

And it isn't turbo surge that's making the noise, it kinda sounds like a vacuum.

No, it's not turbo surge making that noise... it's the fat *** garrett turbo after the filter doing it

Originally Posted by Gunther482

Alright. It's pronounced when it shifts, kind of sounds like a blow off valve almost. Or if I give it some pedal at highway speeds I can hear the air being sucked in.

I figured it was normal, I was just making sure.

the "blow off valve" noise is either the wastegate or the air rushing back into the intake. Its fine.

[a.alford]

I have a CAI on my ram2500 360. When i get on it hard and let out it sounds like a blow off valve haha. 5.9's have a loud intake anyway. But yea that 6637 is the way to go on a SD.