REAR CATS DELETE- HELP! - Page 2 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

camaro_25 · 07-07-2012, 01:10 PM

Quote:

Originally Posted by MACE_ENG

ughh no chome....but whatever work for ya

Is a little hard to get this DI engine LOUD without some type of negative sound frequency creeping in. From my experience, going catless with 1 3/4 long tube header and solo CBE definitely made my car sound something like a V8 jet engine hybrid LOL. It was too loud for my taste so I had to take it off and sell quickly. When you start going for loud, you are going to also get some drone and rasp. This is when you have to either use helmholtz principal which solo exhaust basically is(almost a no muffler CBE with helmholtz pipes), or use resonated x-pipe. I personally like resonated x, but it will quiet down your overall noise level, but it will definitely remove all drone and rasp. Long tube/no cats/SOLO, can't go wrong if you want LOUD without the other unwanted frequency

-------------------------------------------------------
Jay@Mace Engineering USA
Direct Email: Velocityport410@gmail.com

Home of the 31hp/33tq Ported intake/25mm Insulator!

That was some great info! Thanks a lot! But when I say chrome I don't mean "dub" style. I was just thinkin it would be cool for a retro look. I'm lookin for a five spoke Kindve carrying that theme. I just personally don't like the black on black look. What do you think? Any ideas? Thanks-

Chrisco22 · 07-07-2012, 01:17 PM

so you didnt touch the front cats huh? i was told with getting retuned, i could turn off the engine light so i think im going to go for it.

camaro_25 · 07-07-2012, 01:19 PM

Quote:

Originally Posted by Chrisco22

so you didnt touch the front cats huh? i was told with getting retuned, i could turn off the engine light so i think im going to go for it.

Well I haven't done anything yet. I was hopin that only removing the rear cats wouldn't make any CEL come on...

Chrisco22 · 07-07-2012, 01:27 PM

it wont, i have already deleted my rear cats. sounds good too. do you have yours tuned yet?

camaro_25 · 07-07-2012, 01:36 PM

Quote:

Originally Posted by Chrisco22

it wont, i have already deleted my rear cats. sounds good too. do you have yours tuned yet?

No not yet. The only thing I have done is MRT 1.0 exhaust.
I'm thinkin next Im goin to delete the resonator and then take off the back set of cats. I'm just tryin to see if I will still pass emissions in NC.

camaro_RS · 07-07-2012, 01:57 PM

Are you guys just putting a piece of straight pipe in place of the rear cats when they're cut out?

camaro_25 · 07-07-2012, 02:02 PM

that would make sense to me? I dont really have a clue how the whole process is done. Thats why i posted about it. Apperantly, if you remove the back two it gives a much deeper, better sound and doesnt cuase any CELs

lscamaro · 07-07-2012, 02:08 PM

Yes, just a straight pipe where the second cat is supposed to go. Yes it does make it louder but it also introduces a bit of rasp.

The emissions questions can probably better be answered by someone who lives in your state and is better aware of the emissions laws there.

And finally, no it won't cause a CEL. So no need to tune.

camaro_25 · 07-07-2012, 02:11 PM

Thanks for the sum up!

DJ ATOMIX · 07-07-2012, 03:27 PM

Rear cats coming off Monday morning, I cant wait!! Simply four cuts with angle grinder, two 2.5" pipes about 5" long and four weld spots to make.

Shaun

Chrisco22 · 07-07-2012, 03:49 PM

you dont need a tune for it unless your doing front cats, but i was asking if you were already tuned. if so the front cat delete would be no problem. u can get it retuned to turn off light.

camaro_25 · 07-07-2012, 05:20 PM

See that sounds so simple but im just trryin to figure out if ill still pass my inspection??

And thats true.

ActNup NY · 07-07-2012, 05:35 PM

Quote:

Originally Posted by lscamaro

If your in a state with strict emissions tests no it won't pass. It's against federal law to modify your cats.

Now having said that, I'm getting it done probably next week.

Ryan2011RS · 07-09-2012, 09:04 AM

What do you guys do to remove the one set of resonators? Just another piece of pipe? Plannin on DT shorties and HFC's to match with my ARK-DTS but thinking the shorties with res delete would sound great enough. I live in Ohio and I'm not too sure about the emissions regulations but I know you can't just delete all 4.

07-07-2012, 01:17 PM	#16
Chrisco22 Drives: 2011 Chevy Camaro LS Join Date: Feb 2012 Location: United States Posts: 368	so you didnt touch the front cats huh? i was told with getting retuned, i could turn off the engine light so i think im going to go for it. __________________ 2011 Camaro LS: [Rally Yellow] [22" Status Rims] [BBK Long Tube Headers w/ High Flow Cats] [Trifecta Tune] [K&N CAI] [Blacked out Bow Ties and Tail Lights] [15% Tint] [MAC Mufflers] [Rear Cat Delete] [Vmax Black Ice]

07-07-2012, 01:27 PM	#18
Chrisco22 Drives: 2011 Chevy Camaro LS Join Date: Feb 2012 Location: United States Posts: 368	it wont, i have already deleted my rear cats. sounds good too. do you have yours tuned yet? __________________ 2011 Camaro LS: [Rally Yellow] [22" Status Rims] [BBK Long Tube Headers w/ High Flow Cats] [Trifecta Tune] [K&N CAI] [Blacked out Bow Ties and Tail Lights] [15% Tint] [MAC Mufflers] [Rear Cat Delete] [Vmax Black Ice]

07-07-2012, 01:57 PM	#20
camaro_RS Emerald Coast Camaros Drives: A lot of show, not much go. Join Date: Mar 2011 Location: Emerald Coast Posts: 3,388	Are you guys just putting a piece of straight pipe in place of the rear cats when they're cut out? __________________ -White Mary Jane....build thread [COTW 6/11/12] :

07-07-2012, 02:08 PM	#22
lscamaro Drives: 2011 CGM Camaro LS A6 Join Date: Jan 2011 Location: San Antonio, Texas Posts: 10,305	Yes, just a straight pipe where the second cat is supposed to go. Yes it does make it louder but it also introduces a bit of rasp. The emissions questions can probably better be answered by someone who lives in your state and is better aware of the emissions laws there. And finally, no it won't cause a CEL. So no need to tune. __________________ Click Picture for Build Thread

07-07-2012, 03:27 PM	#24
DJ ATOMIX << CRAZY BEE >> Drives: 400HP 2LT/RS Join Date: Apr 2009 Location: Alberta Posts: 1,156	Rear cats coming off Monday morning, I cant wait!! Simply four cuts with angle grinder, two 2.5" pipes about 5" long and four weld spots to make. Shaun __________________ CRAZY BEE - IOM 2LT/RS (more) Cosmetic Mods - 24 \| Performance Mods - 14 ROTO-FAB CAI - DT HEADERS - CUSTOM 3-INCH PIPE EXHAUST - RES DEL - R-CATS DEL - MAGNAFLOW RES X-PIPE - 91 OCTANE TUNE - FULL ADM KIT - PORTED IM - PORTED TB - PORTED CH - BLACK 3/8 ISOLATOR - TRIFECTA TUNED

07-07-2012, 02:02 PM	#21
camaro_25 Drives: 2011 Black Camaro 1lt Join Date: Aug 2011 Location: NC Posts: 115 View My Garage	that would make sense to me? I dont really have a clue how the whole process is done. Thats why i posted about it. Apperantly, if you remove the back two it gives a much deeper, better sound and doesnt cuase any CELs

07-07-2012, 02:11 PM	#23
camaro_25 Drives: 2011 Black Camaro 1lt Join Date: Aug 2011 Location: NC Posts: 115 View My Garage	Thanks for the sum up!

07-07-2012, 03:49 PM	#25
Chrisco22 Drives: 2011 Chevy Camaro LS Join Date: Feb 2012 Location: United States Posts: 368	you dont need a tune for it unless your doing front cats, but i was asking if you were already tuned. if so the front cat delete would be no problem. u can get it retuned to turn off light. __________________ 2011 Camaro LS: [Rally Yellow] [22" Status Rims] [BBK Long Tube Headers w/ High Flow Cats] [Trifecta Tune] [K&N CAI] [Blacked out Bow Ties and Tail Lights] [15% Tint] [MAC Mufflers] [Rear Cat Delete] [Vmax Black Ice]

07-07-2012, 05:20 PM	#26
camaro_25 Drives: 2011 Black Camaro 1lt Join Date: Aug 2011 Location: NC Posts: 115 View My Garage	See that sounds so simple but im just trryin to figure out if ill still pass my inspection?? And thats true.

07-09-2012, 09:04 AM	#28
Ryan2011RS Drives: 2013 2SS/RS dusk edition . Join Date: Sep 2011 Location: NE, Ohio Posts: 232	What do you guys do to remove the one set of resonators? Just another piece of pipe? Plannin on DT shorties and HFC's to match with my ARK-DTS but thinking the shorties with res delete would sound great enough. I live in Ohio and I'm not too sure about the emissions regulations but I know you can't just delete all 4.