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3" or 4" cai

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Old 05-25-2016, 03:59 AM
  #181  
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I built a 3.5" custom ram intake this weekend however I'm noticing a loud vibration which could possibly be my air filter hitting the felt liner on the bottom of the hood. This only seems to happen when I rev over 6k rpm. I used an old k&n fipk air box and think I might be able to make more room by cutting a slightly larger hole to allow the intake to ride lower.

Will this be a long term problem if the filter continues to hit the liner or could I put some padding on the liner to reduce the vibration?

Or does anyone have a suggestion for a lower profile filter cone? I'm using a 6" AEM filter.
Old 05-25-2016, 09:47 AM
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I am using the K&N airbox for mine as well. The Filter sits about level with the top of the box. I did modify the elbow bracket that held the K&N intake arm to fit the 3.5" intake. I do not have rubbing issues, I also do not have the hood liner installed.

I don't have an image straight on from the front of the car, but you can get a feel for what is happening from this photo.

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Old 05-25-2016, 10:04 AM
  #183  
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Originally Posted by Aurex
I am using the K&N airbox for mine as well. The Filter sits about level with the top of the box. I did modify the elbow bracket that held the K&N intake arm to fit the 3.5" intake. I do not have rubbing issues, I also do not have the hood liner installed.

I don't have an image straight on from the front of the car, but you can get a feel for what is happening from this photo.

Your still on factory Throttle body? doesn't that defeat the purpose?
Old 05-25-2016, 10:25 AM
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Everything in due time. I wish I had enough time and money to do everything at once.
Old 05-25-2016, 11:40 AM
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Originally Posted by Aurex
I am using the K&N airbox for mine as well. The Filter sits about level with the top of the box. I did modify the elbow bracket that held the K&N intake arm to fit the 3.5" intake. I do not have rubbing issues, I also do not have the hood liner installed.

I don't have an image straight on from the front of the car, but you can get a feel for what is happening from this photo.

Which elbow bracket did you modify and how? Which filter are you using?
Old 05-25-2016, 12:30 PM
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Originally Posted by iridedumped
Originally Posted by Aurex' timestamp='1464198424' post='23976234
I am using the K&N airbox for mine as well. The Filter sits about level with the top of the box. I did modify the elbow bracket that held the K&N intake arm to fit the 3.5" intake. I do not have rubbing issues, I also do not have the hood liner installed.

I don't have an image straight on from the front of the car, but you can get a feel for what is happening from this photo.

Your still on factory Throttle body? doesn't that defeat the purpose?
I had gains with this on stock throttle body.
Old 05-25-2016, 01:21 PM
  #187  
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Originally Posted by zman0125
Which elbow bracket did you modify and how? Which filter are you using?
The elbow is in this picture with the hose clamp on the K&N intake arm by the airbox, I had to elongate the mounting hole to allow it to sit lower.

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Mounting hole elongated:

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My parts list is provided by another member (page 4 of this thread), following in his footprints:

Originally Posted by 06Estukay
Item List:
- AEM Dry Flow Filter p/n 21-210EDK
- Vibrant Velocity Stack, Aluminum (3.5" Inlet O.D., 6" Bellmouth O.D.) p/n 10952
- Vibrant 16mm O.D. Vacuum Line Fitting p/n 2896
- Vibrant 4 Ply Reducer Coupling, 3" x 3.5" x 3" long p/n 2774
- Vibrant 4 Ply Silicone Sleeve, 3.5" I.D. x 3" long - Black p/n 2716
- 3.5" 90 degree L intercooler tube

Originally Posted by slowd16
I had gains with this on stock throttle body.
Thanks for the info.
Old 05-26-2016, 04:47 PM
  #188  
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does anyone have the dimensions on the fipk fox portion alone so that someone could remake it to use with bigger piping
Old 06-02-2016, 03:14 PM
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Originally Posted by Aurex
The elbow is in this picture with the hose clamp on the K&N intake arm by the airbox, I had to elongate the mounting hole to allow it to sit lower. Mounting hole elongated: My parts list is provided by another member (page 4 of this thread), following in his footprints: Thanks for the info.
Did you dyno this intake? Before and after...
Old 06-03-2016, 06:46 AM
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Originally Posted by arsenal
Originally Posted by Aurex
The elbow is in this picture with the hose clamp on the K&N intake arm by the airbox, I had to elongate the mounting hole to allow it to sit lower. Mounting hole elongated: My parts list is provided by another member (page 4 of this thread), following in his footprints: Thanks for the info.
Did you dyno this intake? Before and after...
Not yet. When I do it will only be a calculated one from data logs, since I live in the middle of nowhere and don't care to drive 6-8 hours to get a number.


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