AIS flow mods
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Tuned
Joined: Jan 2023
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AIS flow mods
I know there are many posts about this but most I could find are years old.
question for those who have done the mods for improved airflow do you regret any of them? "Zoodad" ,"secret zoodad", fender hole. Other I have not seen?
Since removing the garbage k&n/stock air box I have had lower power, and smoke (not much, I have just lived with it.). Also I think it is sucking some oil out of the crank case under high boost.
Just wanted to ask you all before I go cutting holes.
Thanks
question for those who have done the mods for improved airflow do you regret any of them? "Zoodad" ,"secret zoodad", fender hole. Other I have not seen?
Since removing the garbage k&n/stock air box I have had lower power, and smoke (not much, I have just lived with it.). Also I think it is sucking some oil out of the crank case under high boost.
Just wanted to ask you all before I go cutting holes.
Thanks
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,112
From: Rio Rico, AZ.
Those are supposed to utilize the intake duct built into the fender well. No need for zoodad. I tried one of those years ago and pulled the filter minder to the first notch with a brand new filter element installed going over Snoqualmie pass while pulling the 5th wheel. It came back out a short time later and the trusty old 6637 filter went back in. Ended up selling it to a friend with a 7.3.
Lead Driver
Joined: Jul 2017
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From: WV
Originally Posted by Kwikkordead
Those are supposed to utilize the intake duct built into the fender well. No need for zoodad. I tried one of those years ago and pulled the filter minder to the first notch with a brand new filter element installed going over Snoqualmie pass while pulling the 5th wheel. It came back out a short time later and the trusty old 6637 filter went back in. Ended up selling it to a friend with a 7.3.
Originally Posted by Dan V
The filter is the restriction, not the box.
AIS Testing Thread
The filter minder can pull in on hard pulls in a hot tune but on normal driving it rarely goes past the first notch. This includes medium towing. I decided to sacrifice a little flow in the name of a quiet intake.
I performed the Secret Zoodad and highly recommend it. It’s completely invisible, no chance of rain/bug intrusion, it’s a straight shot to the snorkel, and should work based off the pressure principle at the front of the truck. I would not do the regular Zoodad personally.
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Laughing Gas
Joined: Mar 2021
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IIRC some folks have made holes in the bottom of the box which have resulted in less restriction. That plus @RacinJasonWV data imply to me that the box is a big contributor to restriction vs the filter. It makes sense since Powercore filters are designed around air being ingested "from the front" vs radially. In the 7.3 the air has to "turn right then upwards" to enter the powercore filter, then upon exit has to make another 90 degree bend.
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Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,112
From: Rio Rico, AZ.
Thank you. It's been more than ten years ago now, so details get a little blurred.
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Tuned
Joined: Jan 2023
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Thank you everyone for your input.
what I am hearing is secret zoodad, fender hole / sleeve. If that doesn't work then 6637.
If I end up going the 6637 would the kit at riffraff with the blue filter be a good option?
what I am hearing is secret zoodad, fender hole / sleeve. If that doesn't work then 6637.
If I end up going the 6637 would the kit at riffraff with the blue filter be a good option?
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,112
From: Rio Rico, AZ.
Yes, it would. One of the best around.
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