Hopin The Fence, Partial Cat Del - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

DJ ATOMIX · 07-05-2012, 09:40 AM

So after considering deleting the smaller cats, I've decided to go for it and book an appointment. Monday morning is when they come off! From research I've come to the conclusion that no CEL will come from doing this. The end results are a slight HP gain 2-3hp on the v6 and a nice boost in exhaust volume as verified by scrming.

Stay tuned for my results. Fyi, I'm looking at $150 to do this. I was going to up the pipe size from 2.25 to 2.5" but I'm still looking for a donated pipe. A custom pipe at the shop would be $200, not worth it IMO.

EDIT: Scroll down to post #5 for the results...

Shaun

scrming · 07-05-2012, 10:09 AM

Quote:

Originally Posted by DJ ATOMIX

So after considering deleting the smaller cats, I've decided to go for it and book an appointment. Monday morning is when they come off! From research I've come to the conclusion that no CEL will come from doing this. The end results are a slight HP gain 2-3hp on the v6 and a nice boost in exhaust volume as verified by scrming.

Stay tuned for my results. Fyi, I'm looking at $150 to do this. I was going to up the pipe size from 2.25 to 2.5" but I'm still looking for a donated pipe. A custom pipe at the shop would be $200, not worth it IMO.

Shaun

serious amounts of

DJ ATOMIX · 07-05-2012, 10:29 AM

Quote:

Originally Posted by scrming

serious amounts of

I know you were mentioning more rasp along with the volume. I hope this magnaflow Res xpipe countinues to amaze eliminating any potential rasp. As it stands I have near zero rasp.

Shaun

camaro_RS · 07-05-2012, 03:26 PM

DJ ATOMIX · 07-09-2012, 12:11 PM

Ok its a done deal, the rear cats were deleted and the Camaro is substantially louder. The idle seems to be exactly the same volume as before. However, once you start accelerating, there is a deeper noticeable sound note with quite a bit more volume thats following through.

On the performance side, yes, there is a noticeable differance in my opinion. Inspecting the R cats in my hands, I cannot believe exhaust was capable of even making it through. Heck, water doesnt even wanna pour through when I tried pouring water through them. They are a huge bottleneck IMO. On the freeway, the Camaro has substantially more jive and this is demonstrated in the 35c temps were having today.

As for emisions tests, I will have to get that theory tested, not sure when thats gonna be. In all, the mod costed $150 but in my opinion was worth it.

FYI, I have not noticed any popping or hickups from downshifting like others are reporting. I'm not sure if the res xpipe has anything to do with that.

All in all, I'm now "more happy with my resonated xpipe" and I feel it finally produces near stock MRT 1.0 sound without any rasp at all.

Hmm... so whats next, I wonder if I can get 3" exhaust piping from the xpipe to the mufflers

or maybe im going over board.

EDIT:: There is no CEL for anyone wondering. This is a CEL free cat mod..

Untill the next mod!

Shaun

scrming · 07-09-2012, 12:49 PM

camaro_RS · 07-09-2012, 02:43 PM

So I'm assuming it didn't, but It didn't create any extra rasp along with the loudness? Or it may have and it just that your res x-pipe is keeping it at bay? Thanks for the write up!

One Sick Camaro · 07-09-2012, 02:58 PM

hmm maybe doing this now too lol gotta ge the x pipe first will be redic too loud without it

mycamaro2011 · 07-09-2012, 03:06 PM

I Just got one of those X Pipe Mufflers on ebay for $75 b/o with free shipping.

Pm if you want the link

Quote:

Originally Posted by One Sick Camaro

hmm maybe doing this now too lol gotta ge the x pipe first will be redic too loud without it

DJ ATOMIX · 07-09-2012, 04:11 PM

Quote:

Originally Posted by camaro_RS

So I'm assuming it didn't, but It didn't create any extra rasp along with the loudness? Or it may have and it just that your res x-pipe is keeping it at bay? Thanks for the write up!

I think without that resonated xpipe, the rasp probally would have gotten out of control! But with that said, yes there is a increase in volume and alot more growl when you touch the peddle.

Again at idle, to me it sounds exactly the same as before. I'm not sure about cold starts thou, we'll have to stay tuned for that

Nothing like a CEL free cat mod!!

Shaun

DJ ATOMIX · 07-09-2012, 04:16 PM

Quote:

Originally Posted by One Sick Camaro

hmm maybe doing this now too lol gotta ge the x pipe first will be redic too loud without it

Since you got the MRT 1.0 and res delete, when you add the res xpipe, it will sound like a completely differant car... You might be like what the hell is this but then you'll understand once you hit the peddle and there just isnt any rasp.

With that said, some people like rasp to a degree. This Cat del will give you more growl and volume, thats a given. I can almost garantee without the resonated xpipe, the rasp would probally be out of control from this mod.

Great combo IMO.

Shaun

Nytemare · 07-09-2012, 04:52 PM

OK dumb moment, can someone link me a video containing a lot of "rasp" so I can hear it.. I have very good speakers. I love my exhaust sound right now and I really want to do this delete but wondering what the sound will be like while waiting on the res x pipe to get here? Thanks!

lscamaro · 07-13-2012, 01:29 PM

So, it's been a few days. How are you liking the rear cat delete? My extra set of cats are currently being hacked up! Kind of excited and scared at the same time! Don't want rasp but we will see what happens!

DJ ATOMIX · 07-14-2012, 09:55 AM

Quote:

Originally Posted by lscamaro

So, it's been a few days. How are you liking the rear cat delete? My extra set of cats are currently being hacked up! Kind of excited and scared at the same time! Don't want rasp but we will see what happens!

I love it! So glad I did it! I can notice the differance in power and the Camaro is quite a bit louder and deeper when accelerating. Also, I've now heard the cold start a few times and I must say, wow! soo much louder lol. The car is basically as loud as before the xpipe was installed but now there is zero rasp!

Diff worth the $150 the price I paid to have this done and I would recommend it to anyone.

My favourite combo so far is the shorty heads, no resonators, hpipe replaced with the res xpipe to kill rasp, then those rear cats deleted to get the volume back.

Shaun

scrming · 07-14-2012, 09:58 AM

DJ ATOMIX · 07-14-2012, 10:05 AM

Quote:

Originally Posted by scrming

Scrming, thanks again for all the input and the advice you've provide us in attempting this mod. I wouldnt have even thought of doing this mod until I got convinced after seeing your posts.

Awesome stuff man!

Shaun

mycamaro2011 · 07-14-2012, 10:37 AM

Iam getting the tru x pipe muffler on monday by ups.

I went to this muffler shop and they put car up on lift and said $450 to cut the old hpipe and 2 resonators out and to put the new muffler in with piping. OMG are you kidding me.

These shops up here in mass just bend you over.

anyone in the mass area know an exhaust shop to do this job for cheap.

lscamaro · 07-14-2012, 11:05 PM

Did u get a burning smell after you did it?

scrming · 07-15-2012, 06:16 AM

Quote:

Originally Posted by lscamaro

Did u get a burning smell after you did it?

New pieces of pipe tend to have a "burn off" smell...wonder if that is what you are smelling..

lscamaro · 07-15-2012, 11:41 AM

I hope so lol

07-05-2012, 09:40 AM	#1
DJ ATOMIX << CRAZY BEE >> Drives: 400HP 2LT/RS Join Date: Apr 2009 Location: Alberta Posts: 920	Hopin The Fence, Partial Cat Del So after considering deleting the smaller cats, I've decided to go for it and book an appointment. Monday morning is when they come off! From research I've come to the conclusion that no CEL will come from doing this. The end results are a slight HP gain 2-3hp on the v6 and a nice boost in exhaust volume as verified by scrming. Stay tuned for my results. Fyi, I'm looking at $150 to do this. I was going to up the pipe size from 2.25 to 2.5" but I'm still looking for a donated pipe. A custom pipe at the shop would be $200, not worth it IMO. EDIT: Scroll down to post #5 for the results... Shaun __________________ CRAZY BEE - IOM 2LT/RS (more) Cosmetic Mods - 23 \| Performance Mods - 13 ROTO-FAB CAI - DT HEADERS - MRT1 EXHAUST - RES DEL - R-CATS DEL - MAGNAFLOW RES X-PIPE - PHASE CAM FULL ADM KIT - PORTED IM - PORTED TB - PORTED CH - BLACK 3/8 ISOLATOR - TRIFECTA TUNED Last edited by DJ ATOMIX; 07-09-2012 at 12:11 PM.

07-05-2012, 03:26 PM	#4
camaro_RS Emerald Coast Camaros Drives: A lot of show, not much go. Join Date: Mar 2011 Location: Emerald Coast Posts: 2,926	__________________ -White Mary Jane....build thread [COTW 6/11/12] :

07-09-2012, 12:49 PM	#6
scrming Red Brick of Vengeance! Drives: 12 Second Brick Join Date: Jun 2009 Location: at my pulpit Posts: 7,490	__________________ 2013 MRT Laguna ST - 249 WHP & 339 WTQ 2011 Ford Flex EcoBoost Limited - 12.727 @ 109.790 MPH

07-09-2012, 02:43 PM	#7
camaro_RS Emerald Coast Camaros Drives: A lot of show, not much go. Join Date: Mar 2011 Location: Emerald Coast Posts: 2,926	So I'm assuming it didn't, but It didn't create any extra rasp along with the loudness? Or it may have and it just that your res x-pipe is keeping it at bay? Thanks for the write up! __________________ -White Mary Jane....build thread [COTW 6/11/12] :

07-09-2012, 02:58 PM	#8
One Sick Camaro "The one" coming soon... Drives: 10 Camaro 1LT 02 T/A WS6 06 HHR 2LT Join Date: Mar 2010 Location: NJ Posts: 1,780	hmm maybe doing this now too lol gotta ge the x pipe first will be redic too loud without it __________________

07-09-2012, 12:11 PM	#5
DJ ATOMIX << CRAZY BEE >> Drives: 400HP 2LT/RS Join Date: Apr 2009 Location: Alberta Posts: 920	Ok its a done deal, the rear cats were deleted and the Camaro is substantially louder. The idle seems to be exactly the same volume as before. However, once you start accelerating, there is a deeper noticeable sound note with quite a bit more volume thats following through. On the performance side, yes, there is a noticeable differance in my opinion. Inspecting the R cats in my hands, I cannot believe exhaust was capable of even making it through. Heck, water doesnt even wanna pour through when I tried pouring water through them. They are a huge bottleneck IMO. On the freeway, the Camaro has substantially more jive and this is demonstrated in the 35c temps were having today. As for emisions tests, I will have to get that theory tested, not sure when thats gonna be. In all, the mod costed $150 but in my opinion was worth it. FYI, I have not noticed any popping or hickups from downshifting like others are reporting. I'm not sure if the res xpipe has anything to do with that. All in all, I'm now "more happy with my resonated xpipe" and I feel it finally produces near stock MRT 1.0 sound without any rasp at all. Hmm... so whats next, I wonder if I can get 3" exhaust piping from the xpipe to the mufflers or maybe im going over board. EDIT:: There is no CEL for anyone wondering. This is a CEL free cat mod.. Untill the next mod! Shaun __________________ CRAZY BEE - IOM 2LT/RS (more) Cosmetic Mods - 23 \| Performance Mods - 13 ROTO-FAB CAI - DT HEADERS - MRT1 EXHAUST - RES DEL - R-CATS DEL - MAGNAFLOW RES X-PIPE - PHASE CAM FULL ADM KIT - PORTED IM - PORTED TB - PORTED CH - BLACK 3/8 ISOLATOR - TRIFECTA TUNED Last edited by DJ ATOMIX; 07-09-2012 at 04:18 PM.

07-09-2012, 04:52 PM	#12
Nytemare Quick 6 Drives: 2010 camaro ls v6 Join Date: May 2010 Location: Myrtle Beach SC/ Greenville NC Posts: 240 View My Garage	OK dumb moment, can someone link me a video containing a lot of "rasp" so I can hear it.. I have very good speakers. I love my exhaust sound right now and I really want to do this delete but wondering what the sound will be like while waiting on the res x pipe to get here? Thanks! __________________

07-13-2012, 01:29 PM	#13
lscamaro Drives: 2011 CGM Camaro LS A6 Join Date: Jan 2011 Location: San Antonio, Texas Posts: 5,391	So, it's been a few days. How are you liking the rear cat delete? My extra set of cats are currently being hacked up! Kind of excited and scared at the same time! Don't want rasp but we will see what happens! __________________ Current Mods: Vararam \| Borla ProXS Custom Axle-Back \| Mace 25mm Insulator \| MACE Ported Intake Manifold \| And a few other things Click here to visit my Build Thread!

07-14-2012, 09:58 AM	#15
scrming Red Brick of Vengeance! Drives: 12 Second Brick Join Date: Jun 2009 Location: at my pulpit Posts: 7,490	__________________ 2013 MRT Laguna ST - 249 WHP & 339 WTQ 2011 Ford Flex EcoBoost Limited - 12.727 @ 109.790 MPH Last edited by scrming; 07-14-2012 at 10:21 AM.

07-14-2012, 10:37 AM	#17
mycamaro2011 Drives: 2010 Camaro 2LT Victory Red Join Date: Feb 2011 Location: Boston MA Posts: 196	Iam getting the tru x pipe muffler on monday by ups. I went to this muffler shop and they put car up on lift and said $450 to cut the old hpipe and 2 resonators out and to put the new muffler in with piping. OMG are you kidding me. These shops up here in mass just bend you over. anyone in the mass area know an exhaust shop to do this job for cheap.

07-14-2012, 11:05 PM	#18
lscamaro Drives: 2011 CGM Camaro LS A6 Join Date: Jan 2011 Location: San Antonio, Texas Posts: 5,391	Did u get a burning smell after you did it? __________________ Current Mods: Vararam \| Borla ProXS Custom Axle-Back \| Mace 25mm Insulator \| MACE Ported Intake Manifold \| And a few other things Click here to visit my Build Thread!

07-15-2012, 11:41 AM	#20
lscamaro Drives: 2011 CGM Camaro LS A6 Join Date: Jan 2011 Location: San Antonio, Texas Posts: 5,391	I hope so lol __________________ Current Mods: Vararam \| Borla ProXS Custom Axle-Back \| Mace 25mm Insulator \| MACE Ported Intake Manifold \| And a few other things Click here to visit my Build Thread!