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Old 07-25-2012, 12:01 PM   #1
Jason@JacFab
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Anyone want to get rid of their stock ZL1 airbox?

There is no classified section that's ZL1 specific so I thought I'd put this here to see if anyone wants to get rid of their stock ZL1 airbox (w/ the scoop(s)/snorkle(s))? Don't need the tube. Shoot me a PM if you've got one you'd be willing to part with.
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Old 07-25-2012, 02:15 PM   #2
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Yes-make me a offer.
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Old 07-25-2012, 05:29 PM   #3
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Yes-make me a offer.
They are like $385.00 from chevy
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Old 07-25-2012, 05:58 PM   #4
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They are like $385.00 from chevy
Odds are I won't be picking one up then LOL... SS box is about $90 from my dealer, see people selling them on here for $40-50 or even giving them away... Couldn't find part number, or price info on the ZL1 box. Thanks for the heads up!
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Old 07-26-2012, 09:16 AM   #5
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Would someone be kind enough to post some good pics' of the OEM air box, please?
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Old 07-26-2012, 10:16 AM   #6
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Originally Posted by radz28 View Post
Would someone be kind enough to post some good pics' of the OEM air box, please?
I have these:


You can see there is a second scoop/snorkle hole... I doubt it would really make that much of a difference in flow, or if there is another opening for fresh air in the core support for it or not?


Stock SS airbox.

I really just wanted a ZL1 box to test it out on my flowbench.
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Old 07-26-2012, 10:25 AM   #7
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Originally Posted by RacnJsn95 View Post
I have these:


You can see there is a second scoop/snorkle hole... I doubt it would really make that much of a difference in flow, or if there is another opening for fresh air in the core support for it or not?


Stock SS airbox.

I really just wanted a ZL1 box to test it out on my flowbench.
Supposedly, GM gained the extra 24hp over the CTS-V through tinkering with the intake/airbox. Judging by the photo, there isn't much difference between the LS3 & ZL1 airbox (other than the 2nd small snorkle). On the other hand, the air filters are def different. Like mentioned in my ZL1 air filter thread, it doesnt look like you can use a ZL1 airbox with the stock LS3 intake piping (different lids). I'm still interested in your findings if you do test this out.
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Old 07-26-2012, 10:32 AM   #8
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Quote:
Originally Posted by 1LEE View Post
Supposedly, GM gained the extra 24hp over the CTS-V through tinkering with the intake/airbox. Judging by the photo, there isn't much difference between the LS3 & ZL1 airbox (other than the 2nd small snorkle). On the other hand, the air filters are def different. Like mentioned in my ZL1 air filter thread, it doesnt look like you can use a ZL1 airbox with the stock LS3 intake piping (different lids). I'm still interested in your findings if you do test this out.
I don't know if anything else was changed on the inside of the box, aside from the "high flow" filter.

From looking at the diagrams, I suspect the ZL1 box lid would *fit* the SS box, however like you said, the ZL1 lid screws down, where is the SS box lid snaps on... I think a person with a little gumption could find a way to make the ZL1 lid work on the SS box, of course, IF there were any substancial gains to be had from doing so, otherwise it's just beating a dead horse.
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Old 07-26-2012, 11:25 AM   #9
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The tinkering was a second opening for the airbox, a redesigned intercooler, and better upper plenum The pleats in the filter are also different for more flow.

Thanks for the illustrations!!! It would still be cool to see some pics'. After seeing this, I'm not surprised there are improvements that can be made.
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Old 07-26-2012, 11:48 AM   #10
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Originally Posted by RacnJsn95 View Post
I don't know if anything else was changed on the inside of the box, aside from the "high flow" filter.

From looking at the diagrams, I suspect the ZL1 box lid would *fit* the SS box, however like you said, the ZL1 lid screws down, where is the SS box lid snaps on... I think a person with a little gumption could find a way to make the ZL1 lid work on the SS box, of course, IF there were any substancial gains to be had from doing so, otherwise it's just beating a dead horse.
I think when I purchase my 1LE I'm going to throw in a ZL1 air filter, and log my results. A higher flowing filter should help a bit regardless of the assumptions that it won't. I'm not looking for huge gains, and that's why I'm sticking with the stock setup instead of purchasing an aftermarket intake.
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Old 07-26-2012, 11:49 AM   #11
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Quote:
Originally Posted by radz28 View Post
The tinkering was a second opening for the airbox, a redesigned intercooler, and better upper plenum The pleats in the filter are also different for more flow.

Thanks for the illustrations!!! It would still be cool to see some pics'. After seeing this, I'm not surprised there are improvements that can be made.
Thanks for the added info.
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Old 07-26-2012, 09:07 PM   #12
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see below. I replaced it with a RotoFab CAI - much better looking
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Old 07-26-2012, 10:37 PM   #13
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Quote:
Originally Posted by 1LEE View Post
Supposedly, GM gained the extra 24hp over the CTS-V through tinkering with the intake/airbox. Judging by the photo, there isn't much difference between the LS3 & ZL1 airbox (other than the 2nd small snorkle). On the other hand, the air filters are def different. Like mentioned in my ZL1 air filter thread, it doesnt look like you can use a ZL1 airbox with the stock LS3 intake piping (different lids). I'm still interested in your findings if you do test this out.
i thought the extra HP came from the larger intercooler on top of the supercharger than the caddy has
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Old 07-27-2012, 06:33 AM   #14
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i thought the extra HP came from the larger intercooler on top of the supercharger than the caddy has
Yep, that and the intake sytem (airbox, inlet duct, plenum).

The CTS-V's box and plenum is a little more restrictive.
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Old 07-27-2012, 09:31 AM   #15
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see below. I replaced it with a RotoFab CAI - much better looking
WOW!!! Thanks VERY much. Is there a way to get more pics' of the secondary inlet? I think I see it, but because the airbox is so new and clean, it's a little difficult to distinguish. If not, I really appreciate what you've already shared

Quote:
Originally Posted by joes407 View Post
i thought the extra HP came from the larger intercooler on top of the supercharger than the caddy has
Quote:
Originally Posted by 1LEE View Post
Yep, that and the intake sytem (airbox, inlet duct, plenum).

The CTS-V's box and plenum is a little more restrictive.
The tube angles, arrangements, and flow properties of coolant through the intercooler (and air flow) are probably the largest changes that add to the extra power, from what GMHTP had outlined. The upper plenum seems it lends itself to direct the air with less turbulance, too as far as I can tell.

The airbox and inlet elbow/tube are also different for ZL1. CTS-V has a chamber or two hanging off of it, probably for intake roar or whine. I'm kinda' thinking cutting the lower airbox open a little more, and a nice solid elbow should probably fit my power needs; I was thinking CAI, but there aren't any CARB-legal CAIs yet :(...

Thanks everyone for your comments and photos in this thread. To the OP - I hope you get your air box
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Old 07-30-2012, 01:53 PM   #16
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Quote:
Originally Posted by Mr.R View Post
see below. I replaced it with a RotoFab CAI - much better looking
Thanks for the pics!

Quote:
Originally Posted by radz28 View Post
Thanks everyone for your comments and photos in this thread. To the OP - I hope you get your air box
Me too, but I'm not holding my breath :P
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