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Noticable improvement with cut airboxes?

Old Sep 30, 2002 | 01:59 PM
  #1  
D Stroy H8's Avatar
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From: Las Vegas, NV
Car: 1990 Iroc-Z
Engine: L98
Transmission: 700R4
Noticable improvement with cut airboxes?

I figure I'm going to cut off the bottoms of my airboxes in my 90 Iroc-Z 5.7 until I have some xtra cash for a nice looking intake setup that'll also function better.

Anyway - I know tons of you guys have done this, did it make you happy or was it a 'I know it's working but I cant feel it mod'?
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Old Sep 30, 2002 | 03:45 PM
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D Stroy H8's Avatar
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From: Las Vegas, NV
Car: 1990 Iroc-Z
Engine: L98
Transmission: 700R4
Noones done this huh? Wow - to think i'm going to be the first guy on these boards with cut airboxes. C00L! cmon guys, wake up.
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Old Sep 30, 2002 | 05:26 PM
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Ed Maher's Avatar
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From: Manassas VA
Car: 04 GTO
Engine: LS1
Transmission: M12 T56
Re: Noticable improvement with cut airboxes?

Originally posted by D Stroy H8
...a nice looking intake setup that'll also function better.
Nothing looks better, or works better than the stock snorkel on a TPI camaro. At least until you're running somewhere over 110mph in the quarter. Then it might start to be a restriction. All the dyno results i have seen or heard of from 400+ hp cars show a dead heat between the stock snorkel and custom tubular intakes or open TBs.

As for gains from cutting the airboxes. Yes, it is one of those things that you don't really feel, you just do it because you are supposed to and everybody else does.
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Old Sep 30, 2002 | 08:45 PM
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I didnt notice a whole lot until higher speeds on the highway. It seems to pull a lot harder at higher speeds.
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Old Sep 30, 2002 | 09:14 PM
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From: Ohio, USA
Car: 2015 Camaro Z/28 & 2013 Super Bee
Engine: LS7 and 392 HEMI
I don't have any timeslip comparos or dynos, but I cutout the bottom of my airboxes and put in 2 6" round a/c duct elbows and used aluminum tape to "seal" up the airbox to the elbows. Seems to have worked fine so far.
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Old Sep 30, 2002 | 09:29 PM
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From: Leonardtown, Maryland
Car: 89 IROC-Z
Engine: 6.0L LQ4
Transmission: 4l60e
Axle/Gears: 3.70
I got 2 tenths in the quarter when I did it to my stock engine.

Maybe the weather was different or something, but one week I ran a 15.00 and the next it was a 14.80. Can't argue with results...especially the free kind.
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Old Sep 30, 2002 | 10:06 PM
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if you pull out the entire air box and look underneath, it doesn't look like there's any "holes" for the air to flow into the area underneath it. so cutting out the bottom of the airbox probably won't do anything signifigant unless you somehow route the air to it.

didn't stop me from doing it though...
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Old Sep 30, 2002 | 10:11 PM
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From: Las Vegas, NV
Car: 1990 Iroc-Z
Engine: L98
Transmission: 700R4
I looked in the boxes, and theres no openings... I figure with the bottoms off the filters can suck more from other spaces around the boxes. I'm not familiar with the Camaros 'empty places' in the nose... I used to have a firebird.

Right im not gonna change the stock intake... I remember reading on the boards it'll hold for 12 second cars easy... and i'm not going into 12's.
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Old Sep 30, 2002 | 11:11 PM
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Car: 2015 Camaro Z/28 & 2013 Super Bee
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Originally posted by LYV18F
if you pull out the entire air box and look underneath, it doesn't look like there's any "holes" for the air to flow into the area underneath it. so cutting out the bottom of the airbox probably won't do anything signifigant unless you somehow route the air to it..
Yeah, there are 2 small holes in the plastic surrounding the fog lights that goes back in there. I took both those plastic pieces out and used the a/c elbows in their place and that puts nice cold air right to the filters.
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Old Oct 1, 2002 | 10:39 PM
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Dude, 92fireaudio and I just did that to my car today and we both noticed that the car pulled much harder through first and into second. Its a great free mod!
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Old Oct 7, 2002 | 10:21 PM
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From: Las Vegas, NV
Car: 1990 Iroc-Z
Engine: L98
Transmission: 700R4
I think if anything it cant hurt at all.

Now, I am almost sure that it will help, cause the only change that could occur is more air for the filters to suck up.

To make a third point, if I feel motivated one day, the ram air to the fog lights housing will certainly only improve it more.

Im totally going to do this. Decision made, 19 year old happy. Good work boys, clock out and go home to your wives =).
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