Is it normal to hear a "sucking" noise with the 6637 filter? - Ford Powerstroke Diesel Forum
 
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post #1 of 7 Old 08-31-2012, 11:22 PM Thread Starter
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Is it normal to hear a "sucking" noise with the 6637 filter?

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.
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post #2 of 7 Old 08-31-2012, 11:38 PM
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6637 are loud, no worries

'00 F-350 7.3 6637 mod with php tunes.
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post #3 of 7 Old 09-01-2012, 09:15 AM
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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.

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post #4 of 7 Old 09-01-2012, 09:29 AM Thread Starter
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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.
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post #5 of 7 Old 09-01-2012, 11:53 AM
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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

'00 F-350 7.3 6637 mod with php tunes.
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post #6 of 7 Old 09-04-2012, 05:37 AM
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Quote:
Originally Posted by Gunther482 View Post
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

Quote:
Originally Posted by Gunther482 View Post
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.
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post #7 of 7 Old 09-04-2012, 11:56 AM
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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.

'00 F-350 7.3 6637 mod with php tunes.
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