Ccv
Elder User
Joined: Sep 2006
Posts: 627
Likes: 0
From: Middleton, Idaho
If you remove the stock tube that the crank case tube connects too you will notice a piece of plastic that sticks up inside. It is said that that little piece of plastic will restrict your airflow by about 20%, so in therory if you replace it with a smooth walled pipe you could get more air and in turn lower your EGT's. Don't know though, most do this mod to keep things cleaner.
Post Fiend
Joined: Jun 2006
Posts: 9,714
Likes: 2
From: White Mnt's,New Hampshire
If you remove the stock tube that the crank case tube connects too you will notice a piece of plastic that sticks up inside. It is said that that little piece of plastic will restrict your airflow by about 20%, so in therory if you replace it with a smooth walled pipe you could get more air and in turn lower your EGT's. Don't know though, most do this mod to keep things cleaner.
Post Fiend
Joined: Jun 2004
Posts: 9,293
Likes: 10
From: Parker, CO
Having done both the CCV and AIH mods, I couldn't tell any difference at all in performance and EGT's.
As Ron mentioned, the CCV mod is strictly to keep the intercooler system free of oil. It's not a performance mod in any way, unless you're one of those who can blow intercooler boots off easily.
As Ron mentioned, the CCV mod is strictly to keep the intercooler system free of oil. It's not a performance mod in any way, unless you're one of those who can blow intercooler boots off easily.
Elder User
Joined: Sep 2006
Posts: 627
Likes: 0
From: Middleton, Idaho
When doing the CCV mod the piece of plastic that stands up inside the tube that we replace is what I am talking about. We replace with a 4" piece of exhaust pipe. By removing that obstruction it is supposed to give you 20% more air flow. I can't remember the thread but I am pretty sure Eugene was suppying the data, so we have to assume that it is true 
, where the heck is he anyway's?
, where the heck is he anyway's?
Post Fiend
Joined: Jun 2004
Posts: 9,293
Likes: 10
From: Parker, CO
By removing that obstruction it is supposed to give you 20% more air flow.
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Post Fiend
Joined: Jun 2006
Posts: 9,714
Likes: 2
From: White Mnt's,New Hampshire
it doesnt block flow..it disturbs the flow..I never did the AIH delete cause the early 99 never came with it..but it sits just before it splits up in the spider going to the head..when you delete it..it makes a even flow going out of the Y into the heads... I never felt or see any diff's in ccv mod..only a cleaner bay....
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Lead Driver
Joined: Jan 2007
Posts: 6,708
Likes: 5
From: Kiowa CO
This is the restriction on the intake side (the little air horn sticking up from the bottom of the black plastic) that you can eliminate with a CCV mod - that is if you replace the section with a piece of 4" stainless steel.
Post Fiend
Joined: Feb 2008
Posts: 10,977
Likes: 5
From: Lancaster, Pa.
