Go Back   EcoModder Forum > EcoModding > EcoModding Central
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 02-17-2008, 02:55 PM   #1 (permalink)
EcoModding Lurker
 
Join Date: Jan 2008
Posts: 14

Green Machine - '05 Chevrolet Aveo
Thanks: 0
Thanked 0 Times in 0 Posts
What does this part do?

In an effort to discover why my intake air temps are sometimes reading more than 30 degrees above ambient, I tore apart my intake system.

I even dug into the passenger fender well. Under the airbox, inside the fender well, behind the headlight I found another "airbox". The air intake starts in the fender well directly above the tire and has one branch that goes to this second box and the other penetrates the fender and goes to the main airbox.

The second box is empty and has a small hole in the bottom. I believe the hole is there to allow any water that gets in there to drain out.

On the side of the box it says "Resonator" then "Main". Is this meant to make the intake quieter and can it somehow be the source of my fluctuating intake temps?

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 02-17-2008, 03:13 PM   #2 (permalink)
Dartmouth 2010
 
SVOboy's Avatar
 
Join Date: Nov 2007
Location: Hanover, NH
Posts: 6,427

Vegan Powa! - '91 Honda CRX DX
Team Honda
90 day: 66.52 mpg (US)
Thanks: 92
Thanked 113 Times in 82 Posts
Send a message via AIM to SVOboy Send a message via MSN to SVOboy Send a message via Yahoo to SVOboy
The resonator does indeed exist to quiet down the intake, and if it's letting enough air in it's possible that it could be causing the fluctuation (if the sources are of different enough tmperatures.
  Reply With Quote
Old 02-17-2008, 03:24 PM   #3 (permalink)
EcoModding Lurker
 
Join Date: Jan 2008
Posts: 14

Green Machine - '05 Chevrolet Aveo
Thanks: 0
Thanked 0 Times in 0 Posts
I don't think it's letting much air in and it's source of air is still inside the well. I could see where part of the tubing might be considered a snorkel. I think I'll leave the whole works off for now and see what happens. I had a CAI before and noise wasn't an issue. I'd have to be in 2 feet of water for the snorkel aspect to come into play.
  Reply With Quote
Old 02-17-2008, 05:26 PM   #4 (permalink)
Master EcoModder
 
tasdrouille's Avatar
 
Join Date: Jan 2008
Location: Mirabel, QC
Posts: 1,672

The Guzzler - '08 Hyundai Elantra GL
90 day: 33.12 mpg (US)

Got Soul? - '11 Kia Soul 2U
Thanks: 35
Thanked 80 Times in 52 Posts
Removing the resonator is common practice when streamlining the intake.

BTW, why are you concerned with IAT being 30 degrees over ambient?
__________________



www.HyperKilometreur.com - Quand chaque goutte compte...
  Reply With Quote
Old 02-17-2008, 06:05 PM   #5 (permalink)
EcoModding Lurker
 
Join Date: Jan 2008
Posts: 14

Green Machine - '05 Chevrolet Aveo
Thanks: 0
Thanked 0 Times in 0 Posts
I'm not concerned about the 30 degrees
as such. In fact, I'm trying to think up a way
to add and test a warm/hot air intake.

What I am concerned with in this case is the
fact that from moment to moment, the temp
reading from the IAT sensor could vary wildly.

30 degrees above ambient is just the highest single
shift I've seen. I've seen as many as 7 10plus degree changes
in a single minute.

My concern is over what these apparently false readings are doing
to my FE. I've only driven about 30 miles since removing the resonator
but the temp readings are way more stable and stay within 7 degrees of ambient.

Anyone have thoughts as to why this should be the case? We'll see if FE is affected
either way but it seems quicker to accelerate. Could just be me though.
  Reply With Quote
Old 02-17-2008, 06:19 PM   #6 (permalink)
MPG...what?
 
Join Date: Jan 2008
Location: Finksburg, MD
Posts: 145

Terkle - '97 Toyota Tercel Whitehawk
90 day: 40.91 mpg (US)

Bubble - '10 Toyota Yaris base
90 day: 41.88 mpg (US)

Deva - '13 Chevrolet Spark LS
90 day: 39.82 mpg (US)

Malibu5 - '82 Chevrolet Malibu Classic
90 day: 17.61 mpg (US)

Highlander - '06 Toyota Highlander Limited
90 day: 17.84 mpg (US)
Thanks: 8
Thanked 2 Times in 2 Posts
Send a message via AIM to malibuguy
i'd leave it out (but thats me)...take some pics of it, i'd like to see how its designed

most intake snorkus/resonators/etc are pretty nasty, while some aren't that bad at all
__________________
-Greg...the exhaust freak.

-06 Highlander 3.3awd
-10 Yaris sedan
-97 Tercel, 1NZfe swapped
-96 Tercel
-82 Malibu 1UZfe swapped
-19 Fit (wifey ride)



www.pipedreamsfab.com
  Reply With Quote
Old 02-17-2008, 07:26 PM   #7 (permalink)
(:
 
Frank Lee's Avatar
 
Join Date: Jan 2008
Location: up north
Posts: 12,539

Blue - '93 Ford Tempo
Last 3: 27.29 mpg (US)

F150 - '94 Ford F150 XLT 4x4
90 day: 18.5 mpg (US)

Sport Coupe - '92 Ford Tempo GL
Last 3: 69.62 mpg (US)

ShWing! - '82 honda gold wing Interstate
90 day: 33.65 mpg (US)

Moon Unit - '98 Mercury Sable LX Wagon
90 day: 21.24 mpg (US)
Thanks: 1,506
Thanked 3,307 Times in 2,089 Posts
... and noisier vacuums are thought to clean better too.

So one can tell the performance of an intake by looking at/listening to it?
__________________


  Reply With Quote
Old 02-17-2008, 07:31 PM   #8 (permalink)
EcoModding Lurker
 
Join Date: Jan 2008
Posts: 14

Green Machine - '05 Chevrolet Aveo
Thanks: 0
Thanked 0 Times in 0 Posts
At the moment, I don't have a photo host. I can say that it looks rather like the trap under your kitchen sink. with the extra box tapped in at the lowest part of the trap.

I took it for another run. There is a definite improvement in temp reading. Of course with the engine hot, the reading starts out high (105 in this case) but works it's way down. At 65mph it settles in within 2 degrees of reported (62) outside temp and stays there. It was never this stable before. I don't know what funky airflow was at work with the resonator but it seems ok without it. I also don't notice any sound increase without it. I'll report any significant FE changes as well.
  Reply With Quote
Old 02-17-2008, 11:44 PM   #9 (permalink)
MP$
 
diesel_john's Avatar
 
Join Date: Jan 2008
Location: SW Ohio
Posts: 591
Thanks: 5
Thanked 15 Times in 12 Posts
Send a message via MSN to diesel_john
A Helmholtz resonator or Helmholtz oscillator is a container of gas (usually air) with an open hole (or neck or port).

The Helmholtz resonator is an acoustic filter element.

Last edited by diesel_john; 02-17-2008 at 11:50 PM..
  Reply With Quote
Old 02-18-2008, 12:20 AM   #10 (permalink)
Depends on the Day
 
RH77's Avatar
 
Join Date: Nov 2007
Location: Kansas City Area
Posts: 1,761

Teggy - '98 Acura Integra LS
Sports Cars
90 day: 32.74 mpg (US)

IMA - '10 Honda Insight EX
Team Honda
90 day: 34.76 mpg (US)

Tessie - '06 Acura TSX Base
90 day: 28.2 mpg (US)
Thanks: 31
Thanked 40 Times in 34 Posts
Heated Intake

I had a '99 Acura TL that had a heated intake system. I'm not sure why, exactly, but it had a "mini-radiator" with a vacuum actuated door that diverted intake air over a coolant-heated device. My guess is that it heated the air on cold starts to improve emissions. To remove it (if you wanted) required a tie of the high-pressure coolant lines, or leakage would result. I haven't seen that on anything other vehicle, first hand.

I experimented by forcing the door open for a modified warm-air intake. On this particular vehicle, some malfunctioning sensors prevented an accurate test.

RH77

__________________
“If we knew what we were doing, it wouldn't be called research” ― Albert Einstein

_
_
  Reply With Quote
Reply  Post New Thread


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
5th generation civic hatchback - improving aerodynamics AndrewJ Aerodynamics 393 04-14-2014 06:48 AM
VX Info...WARNING: lots of info! TomO Off-Topic Tech 1 01-05-2010 12:39 PM
EGR dilution for more MPG? cfg83 EcoModding Central 18 04-29-2008 09:11 PM
Cooling system drag Daox Aerodynamics 7 01-29-2008 09:01 PM
Cost of block heater install popimp EcoModding Central 5 12-29-2007 08:38 PM



Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com