TwinCam
Aurora Groupie
Oldsmobile, A legend in automotive history
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Post by TwinCam on Sept 21, 2004 15:47:19 GMT -6
This is just awesome. The other day, I removed the airbox assembly, to look at it's contents. Well I decided to remove the silencer (intake tube at fender) and noticed it had some acoustic canceling baffles. Man, the sound coming from the engine makes you want to cry! It sounds like a Z28 and has noticably better pickup. Haven't had any drop in MPG either. Anyone else done this?
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dred98
Aurora Driver
Posts: 470
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Post by dred98 on Sept 21, 2004 16:05:31 GMT -6
I think many people on the forum have done this - (and there was one person who reversed the procedure ;D ) You should take all the extra stuff out of the airbox too.
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Post by erw38 on Sept 21, 2004 21:58:59 GMT -6
I feel like a star!
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Post by JimW on Sept 22, 2004 11:09:18 GMT -6
My airbox is gutted but I left the resonator on for now. Its being all replaced with the RSM intake system anyway, but with a removed resonator...you should get more intake noise! I get better milage too
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Post by erw38 on Sept 22, 2004 11:43:23 GMT -6
I get better milage too Well, isn't someone a showoff ;D
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scottydl
Super Moderator
There's nothin' like an American V-8...
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Post by scottydl on Sept 22, 2004 14:09:34 GMT -6
This is just awesome. The other day, I removed the airbox assembly, to look at it's contents. Well I decided to remove the silencer (intake tube at fender) and noticed it had some acoustic canceling baffles. Man, the sound coming from the engine makes you want to cry! It sounds like a Z28 and has noticably better pickup. Haven't had any drop in MPG either. Anyone else done this? Is this portion of the procedure different from (or in addition to) the standard "airbox gut" that everyone else has done?
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TwinCam
Aurora Groupie
Oldsmobile, A legend in automotive history
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Post by TwinCam on Sept 22, 2004 16:05:09 GMT -6
Not sure scottydl.....I know that the "airbox gut" removes the waffle pattern in the unit itself. Judging by the shape and design of the waffle pattern, it seems to me it will direct the air to the appropriate place and in an aerodynamic fashion. I've elected not to remove the waffle, but to each his own. I mostly wanted some extra rumble from the engine. And with the silencer removed it does a wonderful job!
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Post by erw38 on Sept 22, 2004 22:01:31 GMT -6
Scotty,
I believe 4LiterV8 is referring to the yellowish piece of plastic that is molded into the top of the airbox.
So the airbox gut and his procedure would be essentialy the same.
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Post by kobalt on Sept 22, 2004 22:20:47 GMT -6
I need to look into my airbox to see if mine also contains a sound baffle of sorts. Did anyone with a 3.5 do this mod??
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TwinCam
Aurora Groupie
Oldsmobile, A legend in automotive history
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Post by TwinCam on Sept 23, 2004 15:00:34 GMT -6
erw38, My airbox had no yellow stuff in it. Just a basic airbox to me. The baffle is at the driver front fender, and seperates from the actual airbox assembly. It is shaped like an "L" upside down, and has 3 chambers.
kobalt, Although I haven't seen or heard of anyone doing so in a 3.5L, I believe that it would sound more raspy without the baffle. Even though it is basically a Northstar V8 with 2 cylinders loped off, it is a 90 degree V6 w/ balance shafts to quell the vibration due to unnatural balance. Hey if it works and sounds good, let me know.
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Post by erw38 on Sept 23, 2004 20:49:06 GMT -6
I stand corrected. Sorry
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dred98
Aurora Driver
Posts: 470
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Post by dred98 on Sept 24, 2004 6:38:22 GMT -6
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scottydl
Super Moderator
There's nothin' like an American V-8...
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Post by scottydl on Sept 24, 2004 7:32:18 GMT -6
Great link! Pictures would be even better... With all this airbox talk, I finally gutted the top portion of mine last night while cleaning up after an oil change. But I'm still confused on how to remove the inner (air inlet and waffle?) pieces from the bottom "tray" portion of the assembly. Does the air filter still sit in at an angle, like it's designed? The article link mentioned using a dremel tool to get it out, but I didn't know what needed to be drilled. It was getting dark when I was looking at mine, so I'm sure that didn't help with my visual troubleshooting.
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dred98
Aurora Driver
Posts: 470
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Post by dred98 on Sept 24, 2004 10:03:47 GMT -6
The bit that holds the cleaner stays the same. The hole that needs to be enlarged is below the filter - to make the hole in the plastic the same size as the hole in the metal underneath it. I'm sure someone here had pictures of the whole thing, if I can get copies I'll add them to my website.
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dred98
Aurora Driver
Posts: 470
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Post by dred98 on Sept 25, 2004 7:54:04 GMT -6
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Post by Aurora40 on Sept 25, 2004 17:16:13 GMT -6
I need to look into my airbox to see if mine also contains a sound baffle of sorts. Did anyone with a 3.5 do this mod?? I'm pretty sure your 3.5 shares an airbox with the 4.0. There isn't a whole lot to do with it. I got a K&N panel filter and wrapped mine with Reflectix. I tried once to set up a CAI, but ran into routing issues: www.geocities.com/aurora402002/cai.html
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scottydl
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There's nothin' like an American V-8...
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Post by scottydl on Sept 27, 2004 10:10:15 GMT -6
Another great link... but I'm still confused as to how you get from the original bottom in the picture below (#1) to the modified bottom (#2). They don't even seem to be the same shape... how does the air filter fit in?
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scottydl
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There's nothin' like an American V-8...
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Post by scottydl on Oct 4, 2004 13:45:40 GMT -6
Anyone know the answer to my last question? I'd like to complete this complete airbox mod if I decide not to buy an aftermarket intake.
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dred98
Aurora Driver
Posts: 470
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Post by dred98 on Oct 4, 2004 16:29:04 GMT -6
The bottom part is the bit that holds the air cleaner at an angle - don't touch anything that the air cleaner actually touches. Once you've taken out the funny looking sound baffle you'll have air holes on the side and in the bottom. What you need to do is make the hole in the plastic as big as the hole in the metal - and that's it for the bottom half. It gives more room for air to get in - it doesn't make a whole lot of difference - you need an exhaust upgrade to get the full benefit - but you do get a bit more induction noise and the engine will breathe a little easier. Replace the air cleaner with a K & N and that will make more of a difference too - although I still haven't done that yet.
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1badaurora
Aurora Watcher
Do you hear that Mister Anderson? That, is the sound of inevitability.
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Post by 1badaurora on Oct 9, 2004 11:19:46 GMT -6
OK, Now I am confused: 4literV8 started this thread by saying " This is just awesome. The other day, I removed the airbox assembly, to look at it's contents. Well I decided to remove the silencer (intake tube at fender) and noticed it had some acoustic canceling baffles. Man, the sound coming from the engine makes you want to cry! It sounds like a Z28 and has noticably better pickup. Haven't had any drop in MPG either. Anyone else done this? By the way, I took the stock intake tube and released it from the air box, took the rsonator off, turned on the car, and reved it....no Z28 sound.... " But as it turns out when I took the airbox lid off, there was no yellow plastic in it, I drive a 95, I wonder why? But here is where I am confused, 4LiterV8 later on in the same thread goes onto say: Not sure scottydl.....I know that the "airbox gut" removes the waffle pattern in the unit itself. Judging by the shape and design of the waffle pattern, it seems to me it will direct the air to the appropriate place and in an aerodynamic fashion. I've elected not to remove the waffle, but to each his own. I mostly wanted some extra rumble from the engine. And with the silencer removed it does a wonderful job!What waffle patter are we talking about!!!, I keep seeing ppl refering to "it" as waffle pattern, then the yellow piece...listen: the lid for the airbox when removed is suppose to have a yellow plastic in it, that yellow plastic doesnt look nothing like a waffle pattern, however the inside of lid of the airbox itself has a waffle patter as part of its actual construction, so who is right can someone please rectify this for us non mechanically inclined. so therefore the only thing with a waffle pattern is the "lid" itself not the yellow piece...so how could anyone discard the waffle pattern, that would mean you are leaving your intake tube just hanging there... And by the way, the "resonator", is that the very top visible piece that is connected to the intake tube itself? if so, I looked in that piece yesterday and its totally hollow, whats the use for that and if i remove it how could/should i seal off the hole on the intake tube? Thanks, Jon
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Post by Aurora40 on Oct 9, 2004 12:20:03 GMT -6
I believe the 1995 airbox is different than the 1996-99.
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