S&B CAI filter twisted - Ford Powerstroke Diesel Forum
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post #1 of 19 Old 03-23-2013, 02:49 AM Thread Starter
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S&B CAI filter twisted

I have had my S&B CAI on my truck for about 6 weeks now, and when I popped the hood today I looked at the filter cartridge the ridges are no longer straight, they are kind of twisted. Is this normal or should I be concerned about anything? The only thing I noticed about my truck (and this happened with the stock air filter) is that sometimes (not all the time) if I let off the throttle if accelerating hard that there is a weird sound coming from the engine compartment. I'm not sure if I can exactly describe the sound, but it sounds like a turbo blowing up on a modified tractor at a tractor pull. Like air rushing back out of the intake. I'm not sure if that makes sense at all, but I really don't know how to describe it. My boost is fine, and it doesn't happen all the time. Anyone got suggestions?
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post #2 of 19 Old 03-23-2013, 03:01 AM
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The sound is refereed to as "turbo fart". The twisted filter is another matter...maybe too restrictive.


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post #3 of 19 Old 03-23-2013, 03:15 AM Thread Starter
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The sound is refereed to as "turbo fart". The twisted filter is another matter...maybe too restrictive.
Well glad to know I'm not the only thing gassy going down the freeway. Is it a bad thing or just normal? Hmm. Wonder how it could be restrictive, it flows more than stock, and I didn't really do anything to make the engine suck more oxygen. Did the zoodad mod as well.
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post #4 of 19 Old 03-23-2013, 03:23 AM
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It's not something you want to do deliberately all the time. With no blow off valve the compressed air has to go somewhere.

SURE it flows more than stock...that's what they tell you. Think about the effect of sucking on a small brown bag. You will collapse the bag. Maybe the filter isn't designed to have the rigidity to stand up to the turbo's demand for air.

My thoughts are if the filter collapses it's either not structurally rigid enough or it's restricting flow.


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post #5 of 19 Old 03-23-2013, 03:28 AM Thread Starter
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Yea the farting doesn't happen often, just wasn't sure what it was and thought it might have had something to do with the filter. As for the filter I will be calling S&B Monday and talking to them about it. It's supposedly designed for the 6.0, which has a turbo. And my turbo is stock, just an aftermarket 4" exhaust. Thanks for your help, puts my mind at ease about the farting. I was just praying it wasn't a sign of a turbo going bad.
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post #6 of 19 Old 03-23-2013, 03:34 AM
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Just understand how it happens, it can be bad in the long run.


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post #7 of 19 Old 03-23-2013, 03:41 AM Thread Starter
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Just understand how it happens, it can be bad in the long run.
That's a Big 10-4
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post #8 of 19 Old 04-17-2013, 12:59 PM
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Mstanek589, do you have the plexiglass top on the intake filter housing, or are you driving with it removed?

Banks CAC, EDE Stage 2 fuel system
S&B Intake, 4" Magnaflow Turbo back, 58v BPD FICM, BPD H2Opump, Sinister Coolant Filter,
ARP headstuds, 2.5"leveled, 20x9 Moto Metal on 35x12.5 Toyo OC ATII
Ported intake manny, MTW Stage 3 Turbo, F.F.190/100 injectors, Chrom. pushrods, spring upgrade, Zoodad Mod, CCV Mod, Gogo Solenoid
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post #9 of 19 Old 04-17-2013, 01:01 PM
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I'm only asking because I have the same S&B intake on my 6.0 and I get the same 'farting' when letting off the throttle too fast. I'm gonna take off the plexiglass top tonight and go for a test drive and report back

Banks CAC, EDE Stage 2 fuel system
S&B Intake, 4" Magnaflow Turbo back, 58v BPD FICM, BPD H2Opump, Sinister Coolant Filter,
ARP headstuds, 2.5"leveled, 20x9 Moto Metal on 35x12.5 Toyo OC ATII
Ported intake manny, MTW Stage 3 Turbo, F.F.190/100 injectors, Chrom. pushrods, spring upgrade, Zoodad Mod, CCV Mod, Gogo Solenoid
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post #10 of 19 Old 04-17-2013, 01:17 PM Thread Starter
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I'm only asking because I have the same S&B intake on my 6.0 and I get the same 'farting' when letting off the throttle too fast. I'm gonna take off the plexiglass top tonight and go for a test drive and report back
Yes, mine does have the plexiglass top still on. That's actually a good idea, well at least a place to start, although I hope that's not the issue because I think the plexiglass looks sharp. Also, taking the plexiglass top off would kinda defeat the design of the intake in my opinion. Anyway lemme know what you find out. Is your filter cartridge twisted as well?
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