Modding stock airbox - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

Reply
 
 
 
Thread Tools Search this Thread
Old 07-13-2004, 03:58 PM   #11
Senior Member
True Car Nut
 
Join Date: Jun 2002
Location: Bedroom, Ontario
Posts: 3,266
Thanks: 0
Thanked 0 Times in 0 Posts
Drifter420 is on a distinguished road
Default

Just got a question for the experts.. if you change the accordian tube to a mendral bent pipeing and slap in a K&N.. wouldn't that work like a CAI?
Drifter420 is offline   Reply With Quote
Old 07-13-2004, 04:30 PM   #12
Senior Member
Certified GM nut
Thread Starter
 
Join Date: Sep 2003
Location: Reutlingen, Baden-Wurttemburg, Germany
Posts: 1,935
Thanks: 0
Thanked 0 Times in 0 Posts
Ryan is on a distinguished road
Default

Not an expert, but....

It would definatly help, but it would not be near as effective. The stock box is just too restrictive.
Ryan is offline   Reply With Quote
Old 07-13-2004, 04:34 PM   #13
Senior Member
True Car Nut
 
Join Date: Jun 2002
Location: Bedroom, Ontario
Posts: 3,266
Thanks: 0
Thanked 0 Times in 0 Posts
Drifter420 is on a distinguished road
Default

Quote:
Originally Posted by Ryan
Not an expert, but....

It would definatly help, but it would not be near as effective. The stock box is just too restrictive.
With the resonator yes I think it'* way too restrictive.. but I was thinking since going CAI.. you will have to build a heat shield box anyways and the only place that will come thru is the opening of the frame before the headlights, so the opening ( at least on my airbox ) is just as big as the opening on the frame that allows air into the system.
Drifter420 is offline   Reply With Quote
Old 07-13-2004, 09:32 PM   #14
Senior Member
Certified GM nut
Thread Starter
 
Join Date: Sep 2003
Location: Reutlingen, Baden-Wurttemburg, Germany
Posts: 1,935
Thanks: 0
Thanked 0 Times in 0 Posts
Ryan is on a distinguished road
Default

Ah, you got a Series II. Yes in your case it would be more effective than a Series 1. But I still can't see it being as effective as a cone filter.
Ryan is offline   Reply With Quote
Old 07-14-2004, 04:51 PM   #15
Junior Member
Posts like a Ricer Type-R
 
Join Date: Jul 2004
Location: Barrie, ON Canada
Posts: 16
Thanks: 0
Thanked 0 Times in 0 Posts
mr_bonn is on a distinguished road
Default

I just finish "gutting" the air box. I also went a little futher and removed some of the plastic structure on the piece that excepts the air filter. On the opposite side from the radiator I removed a section on a 45* angle as there was another hole in the frame in that location. I just came back from a test drive and throttle response has improved and the */C is way louder. It is very humid out and the car feels like a cool summer night, so I can't wait for some cooler weather. When I get time I will take some pics to show what I mean.
mr_bonn is offline   Reply With Quote
Old 07-14-2004, 06:46 PM   #16
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

This may be hard to explain.......a series 1 box doesn't need to be gutted. Just punch som holes in the forward facing section. Better than stock, but still not as effective as a cone.

A cone allows an EVENLY distributed volume of air completely around it'* circumference, which is then evenly fed into the pipe itself. This results in more laminar flow, more air, and higer velocity.

A flat filter can draw air unevenly, since the inlet to the plenum is off-center. More air from one side is fighting air on the other side, and turbulence is created.

In BOTH of these cases, the accordian tube is killing you.
willwren is offline   Reply With Quote
Old 07-15-2004, 01:56 AM   #17
Senior Member
True Car Nut
 
Join Date: Jun 2002
Location: Bedroom, Ontario
Posts: 3,266
Thanks: 0
Thanked 0 Times in 0 Posts
Drifter420 is on a distinguished road
Default

K Bill.. so minus the Accordian tubing.. a Round filter is better then a flat one? Next question.. the round K&N filter have a flat top which forces air around it to enter, thus in a sense does a 180 over and under the filter block unless it'* on an angle.. so in which case.. only one side would still get more air then the rear right? Not tryin to be a smart ***.. My master plan is to keep the stock look for the nice popo'* up here who loves to write ticket.. so I will hack my accordian tube in half.. and cover over the intake pipeing.. and use the stock airbox as heatshield.. ( maybe put some heat tape on the inside ) and either flat filter or cone in there..
Drifter420 is offline   Reply With Quote
Old 07-15-2004, 10:43 AM   #18
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

Ok...fluid dynamics is a 'wierd science'. (no pun intended).

You have 3 basic filter types to consider. First is the replacement K&N flat panel. Then there are 2 types of cones, and these act slightly different.

The flat filter doesn't provide uniform flow. You have a square box feeding a round hole. Too many twists and turns, and not as much surface area as you can get out of a cone.

Replacement K&N: You are the air. Since you need the stock airbox to hold the filter, you're entering the stupid snorkel, as well as any extra holes you punched. Twists and turns. THEN you go through the filter. After the filter, some of the air has to travel farther than some of the other air, as the outlet from the box to the plenum isn't centered. The air actually has to make at least 4 turns even if you have the box gutted.

Standard Cone: The air comes in EVENLY around the entire circumference of the filter. It makes ONE turn, less than 90° (because of the taper of the cone), and heads up the pipe. More surface area than the flat panel (more important in a SC car than NA).

Cone with Velocity stack (can draw from the end as well as the circumference): This filter not only increases the surface area, but also causes a venturi effect. As the air entering from the end passes the main body of the inside of the filter, it DRAWS air into the filter from the circumference. From K&N:

Quote:
Not only does the XStreamŽ add filter area, it actually redirects airflow inside the filter to pull in more air through the side pleats for even greater performance efficiency.
Does that make more sense?
willwren is offline   Reply With Quote
Old 07-15-2004, 12:11 PM   #19
Senior Member
True Car Nut
 
Join Date: Jun 2002
Location: Bedroom, Ontario
Posts: 3,266
Thanks: 0
Thanked 0 Times in 0 Posts
Drifter420 is on a distinguished road
Default

OK.. I'll take your word for it so if I use a cone filter inside the airbox its fine right? ( Course the cone will be connected to the pipeing ).
Drifter420 is offline   Reply With Quote
Old 07-15-2004, 12:16 PM   #20
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

Now your'e killing yourself again. The accordian 'turbulizes' (new word) the air after it leaves the filter.

You also will have a cone sticking out preventing the airbox from being closed. Self-defeating. Even if you could close it, all the air would have to enter the box from the stock snorkel, which is very restrictive.

Nothing about the stock airbox is good if you're looking at cones.
willwren is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Car sounds like a vacuum cleaner cold after airbox modding putertopia 1992-1999 7 10-09-2007 01:06 PM
How to make a real cold air intake using your stock airbox! FattyAzzBonneville Performance, Brainstorming & Tuning 39 06-23-2006 04:02 PM
cone filter inside stock airbox (gutted) hvactech 2000-2005 6 12-24-2005 02:54 PM
Stock Airbox Problem Rogue Performance, Brainstorming & Tuning 15 10-04-2003 10:46 PM
Remove stock airbox completely? Glasuan Performance, Brainstorming & Tuning 21 09-06-2003 10:11 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 09:12 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.