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DropTopGal's IS350 JoeZ Intake Instal

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Old Oct 23, 2007 | 10:11 PM
  #31  
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Originally Posted by phatboyc
Well I may sound paranoid but the number on the engine bay cover looks like the way they classified used parts at a junk yard. Since brand new parts always come in a plastic bag with the part number on a sticker. This is not normal for a brand new car...

My 06 pins holding the covers are the ones with a inner pin you have to push down to remove. Theses are definitely new. Probably for the best.
Having inspected my plastic covers closely, I can assure you that they are new, new, new. The mysterious numbers....hummm...
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Old Oct 27, 2007 | 09:04 PM
  #32  
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Im thinking about installing a JoeZ myself, but waiting for the gunmetal to be restocked. Did you notice any difference in sound with your new intake tube?
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Old Oct 31, 2007 | 10:56 PM
  #33  
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Double kudos to the 10th power for the Joe Z intake!! Why you ask? Just look at what is on the IS-F!

IMO, if it is good enough for Lexus to put it on the "performance oriented" IS-F, that has something to say about the design of the Joe-Z intake. Say Joe, to bad you didn't patent YOUR intake! LOL At the very least, Lexus should pay you a royalty of sorts.
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Old Nov 1, 2007 | 07:21 PM
  #34  
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I don't know DropTopGal, looks like rubber with ribs to me.

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Old Nov 1, 2007 | 08:44 PM
  #35  
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Originally Posted by phatboyc
I don't know DropTopGal, looks like rubber with ribs to me.
You really did say that, didn't you? Any idea what the ribs are for???
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Old Nov 1, 2007 | 09:03 PM
  #36  
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am i missing something? JoeZ's is just a aluminum tube instead of plastic of the stock, That's basically it. Where did the ISF intake design appear like Joe'Z's? The isf is no where close. Matter of fact the IS-F uses dual intakes.
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Old Nov 1, 2007 | 09:09 PM
  #37  
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I dont think they're new engine clips, I have the same ones on my 07
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Old Nov 1, 2007 | 09:21 PM
  #38  
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she meant the new F-sport intake for the IS350, it has a pipe that looks like the JoeZ intake
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Old Nov 1, 2007 | 09:27 PM
  #39  
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Sorry guys... Clarification: I was referring to the F-Sport intake that will be offered for the IS250/350, not the OEM IS-F intake.

BTW...rubber, ribbed.... to funny. LOL
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Old Nov 2, 2007 | 11:09 AM
  #40  
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Ah you mean this one.

Last edited by phatboyc; Nov 2, 2007 at 11:23 AM.
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Old Nov 2, 2007 | 11:29 AM
  #41  
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Originally Posted by lobuxracer
You really did say that, didn't you? Any idea what the ribs are for???
I always though the accordion ribs are to allow movement between engine and air box. Now we know the resonator on the OEM tube didn't do anything performance wise if it's also removed here.
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Old Nov 2, 2007 | 06:01 PM
  #42  
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The ribs have two functions. First, they allow for flexibility as the engine torques and the air box is in a fixed position. Second, the ribs muffle the sound of air in movement. But for those of us in the know, ribs are really for pleasure! At least it says so on the box. LOL
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Old Nov 2, 2007 | 06:06 PM
  #43  
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Originally Posted by DropTopGal
The ribs have two functions. First, they allow for flexibility as the engine torques and the air box is in a fixed position. Second, the ribs muffle the sound of air in movement. But for those of us in the know, ribs are really for pleasure! At least it says so on the box. LOL
How do the Ribs muffle the sound?
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Old Nov 2, 2007 | 06:18 PM
  #44  
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Originally Posted by caymandive
How do the Ribs muffle the sound?
Surely you know this?

It was explained to me that it has to do with the sound that air makes while rushing through the smooth bored tube. A solid tube creates a louder, whoooomping sound, as the air forms one large vorticy like a whirlpool. The ribs break up the one large vorticy by disturbing the air flow, thus resulting in less air intake sound.

I'd post a picture of it, but you'd probably object.
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Old Nov 2, 2007 | 06:52 PM
  #45  
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Originally Posted by DropTopGal
Surely you know this?

It was explained to me that it has to do with the sound that air makes while rushing through the smooth bored tube. A solid tube creates a louder, whoooomping sound, as the air forms one large vorticy like a whirlpool. The ribs break up the one large vorticy by disturbing the air flow, thus resulting in less air intake sound.

I'd post a picture of it, but you'd probably object.
This illustration below that I made is what I "believe" is true for the stock intake tube. Someone here who knows with certainty please correct me if I'm wrong. Droptop I understand what you are trying to say about the "vortices's", but I just have a hard time believing that and I hate to see false information on the forum. Maybe the ribs have three functions. Allow flex, add rigidity and possibly reduce noise. I can kinda see how through theory that just maybe the reinforcing ribs "could" help eliminate airbox reverberation, but not to the extent of being noticeable or designed with that intent.


Last edited by caymandive; Nov 2, 2007 at 07:13 PM.
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