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Stock airbox cover removal on a IX

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Old Jan 8, 2007 | 06:20 AM
  #46  
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From: Socal :)
Originally Posted by ShamelessCookie

I like your idea of funneling from the front IC duct to a cutout in the airbox, what kind of tubing do you think will work best?

Anyway, thanks again to all.
Well from a ease of installation and cost I am planning on using a flexible tubing ~ 3" in diameter. Once I get and install it, I'll let you know the exact details.
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Old Jan 8, 2007 | 06:43 AM
  #47  
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I'll look at ducting, although with excellent temperatures I see little reason - I'm pulling from a cold corner in front of the battery.

To those who say Mitsubishi know best, you can use that argument to leave your car standard. I've changed it because I have MEASURED A DEFICIENCY, corrected it and then MEASURED A BENEFIT. I have pressure drop that is almost as good as an open filter but better temperatures.
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Old Jan 8, 2007 | 08:20 AM
  #48  
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Originally Posted by jcsbanks
I'll look at ducting, although with excellent temperatures I see little reason - I'm pulling from a cold corner in front of the battery.

To those who say Mitsubishi know best, you can use that argument to leave your car standard. I've changed it because I have MEASURED A DEFICIENCY, corrected it and then MEASURED A BENEFIT. I have pressure drop that is almost as good as an open filter but better temperatures.
Can you post a picture of your setup?
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Old Jan 8, 2007 | 10:10 AM
  #49  
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see post #26
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Old Jan 8, 2007 | 10:34 AM
  #50  
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Originally Posted by mrfred
Can you post a picture of your setup?
jcsbanks set up
http://john824.fotopic.net/p37575200.html
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Old Jan 8, 2007 | 11:18 AM
  #51  
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From: Socal :)
Sr. Banks -- What filter are you using? It looks like green foam?
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Old Jan 8, 2007 | 11:50 AM
  #52  
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HKS super. It is standard dealer stuff on a UK car, as are the HKS intercooler and turbo intake pipes, and HKS Superdrager II exhaust (except standard cat).

The FQ360 even has a hi flow cat and an uprated fuel pump and quite a crazy midrange overboost for 360+ lbft out the box.
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Old Jan 8, 2007 | 02:06 PM
  #53  
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Originally Posted by evo150
jcsbanks, I thought you said before that you had some duct work for the cutout. No?
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Old Jan 8, 2007 | 02:22 PM
  #54  
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I have no duct work on it. I took those pictures last night.
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Old Jan 8, 2007 | 02:28 PM
  #55  
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Originally Posted by jcsbanks
I was all for believing that the standard airbox was fine on the stock turbo until I attached a gauge to the turbo inlet pipe and saw the pressure drop of about 1.5 PSI. When Evoscan then came out I could replicate the same readings with the baro sensor. It isn't really measuring baro, it is measuring pressure at the MAF sensor to trim the MAF readings. It would only be measuring baro if it wasn't in a restrictive environment in the inlet. It would be nice to get another snorkel into the other side of the airbox, but I don't see easy places to pick it up from.
I am a little confused with this statement. If you place a boost gauge on the intake pipe from the turbo you will never see boost on that gauge. It will always read vacuum.
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Old Jan 8, 2007 | 02:30 PM
  #56  
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Yes, that' correct. John is referring to absolute pressures and the pressue drop from atmospheric pressure, or the amount of vacuum.


Eric
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Old Jan 10, 2007 | 05:14 AM
  #57  
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Well, I took the cover off of my airbox before I left work last night (left the channel there).

Sounds pretty good, boost had to be turned down one click... other than that, I had no issues...

Edit:

Tthis morning, when I got to work (total miles without cover ~15) and I noticed the "Service Engine Soon" light is on. Doh! But I ran the code, it's for the exhaust which I put on last week (Catalyst). So I'm gonna need a CEL fix.

I'll keep you updated on the airbox situation.

Last edited by recompile; Jan 10, 2007 at 04:17 PM.
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Old Jan 11, 2007 | 10:20 PM
  #58  
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had no problems with taking the top off of mine. i am just debating to if and how i want to mod the stock lid. fully cut it down,jcsbanks method,or cbrd method

Last edited by evo150; Jan 11, 2007 at 10:28 PM.
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Old Jan 12, 2007 | 08:12 PM
  #59  
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Originally Posted by jcsbanks
...

However, I could run top end boost using less wastegate duty cycle with the airbox lid removed or with the modified lid. Or I could run more top end boost more easily without having to retard the timing as much as the stock airbox because of knock. This is backed up by seeing a barometric pressure recorded in the MAF sensor of 9.5-10 kPa below atmospheric (about 10%) with the stock airbox, about 5.5-6 kPa with either the lid removed or the lid modified.

...
I did a few runs with Evoscan and also see about a 9.5 KPa (1.25 psi) vacuum at 7000 rpm. Is the intake noise any louder in the passenger cabin with your airbox mod?
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Old Jan 13, 2007 | 04:45 AM
  #60  
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Another thing I'm curious about is, people say that the IX runs rich from the factory... perhaps removing the lid helps lean it out ?

It certainly sounds a heck of a lot louder! No problems yet for me.
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