Did an entire exhaust delete, catback - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Teeth · 10-28-2019, 10:15 PM

Reposting this from the exhaust forum, with pics

Cut off the exhaust from the O2 sensor to make it stupid loud, but still in legal limits for my state.

But I guess I should get it tuned yeah? Engine light is on. Also the keyfob doesn't start the car. There's a click of the ignition, but nothing, needs manual start.

Any thoughts?

MrChrisLS3 · 10-28-2019, 10:40 PM

Engine light is on because the o2 sensor is exposed to outside air. It's probably reading lean condition.

Remote start will not function if you have a CEL, which you do.

There's a good chance you're going to get carbon monoxide inside the car if the exhaust is dumping out right there.

Teeth · 10-28-2019, 10:43 PM

Quote:

Originally Posted by MrChrisLS3

Engine light is on because the o2 sensor is exposed to outside air. It's probably reading lean condition.

Remote start will not function if you have a CEL, which you do.

There's a good chance you're going to get carbon monoxide inside the car if the exhaust is dumping out right there.

Oh. Well that doesn't sound that bad? I guess I could make custom pipes for side exhaust like a Viper or something.

_Onyx_Wolf_ · 10-28-2019, 10:55 PM

Quote:

Originally Posted by Teeth

Oh. Well that doesn't sound that bad? I guess I could make custom pipes for side exhaust like a Viper or something.

U need at very least some turndown tips so if you backfire you don’t catch something on fire

Teeth · 10-28-2019, 11:09 PM

Quote:

Originally Posted by _Onyx_Wolf_

U need at very least some turndown tips so if you backfire you don’t catch something on fire

That's what I was missing, I knew it, thank you.

lemontwist · 10-28-2019, 11:22 PM

that was a high dollar loud enough exhaust you just cutoff

why not just take off the caps by the mufflers??? the hot exhaust is going to cook the tranny fluid.
to each his own.......a guy at work has a charger 5.7 he did a "muffler delete" i think it sounds like a car the muffler fell off of LOL.

StingrayblueSS · 10-28-2019, 11:30 PM

You could have unbolted the first set of clamps instead of instead of cutting where you did.

Teeth · 10-29-2019, 12:00 AM

Quote:

Originally Posted by lemontwist

that was a high dollar loud enough exhaust you just cutoff

why not just take off the caps by the mufflers??? the hot exhaust is going to cook the tranny fluid.
to each his own.......a guy at work has a charger 5.7 he did a "muffler delete" i think it sounds like a car the muffler fell off of LOL.

It was an old exhaust from a previous owner. Kinda not worth much now lol, maybe a few years ago.

Quote:

Originally Posted by StingrayblueSS

You could have unbolted the first set of clamps instead of instead of cutting where you did.

I didn't think about that one, took it to a muffler shop and they cut it off where I asked, should have thought about it more. Now I'll just have to weld something on it.

InFiD3ViL · 10-29-2019, 12:13 AM

Wow. I hope you didn't just give that old exhaust to the shop. That is not a crap exhaust. That is a fully stainless steel cat back Borla system with X pipe and J-pipes. You could have simply pulled the mufflers off at the rear and either replaced them with straight pipes AFTER the J Pipes and got the loudness you want but with a rear exit and no drone. The J Pipes are to eliminate the cabin drone that you are going to surely get now. Assuming you are not already tuned, that thing is going to sound like a farting monster when AFM/DOD engages.

Like said above, if you have a check engine light on you cannot remote start the car. You will need to get those rear O2 sensors turned off in a tune.

But, if you like it and can tolerate that drone and are happy with it...Your car your choice.

Teeth · 10-29-2019, 12:17 AM

Quote:

Originally Posted by InFiD3ViL

Wow. I hope you didn't just give that old exhaust to the shop. That is not a crap exhaust. That is a fully stainless steel cat back Borla system with X pipe and J-pipes. You could have simply pulled the mufflers off at the rear and either replaced them with straight pipes AFTER the J Pipes and got the loudness you want but with a rear exit and no drone. The J Pipes are to eliminate the cabin drone that you are going to surely get now. Assuming you are not already tuned, that thing is going to sound like a farting monster when AFM/DOD engages.

Like said above, if you have a check engine light on you cannot remote start the car. You will need to get those rear O2 sensors turned off in a tune.

But, if you like it and can tolerate that drone and are happy with it...Your car your choice.

I'm fine with the drone and everything! I did not give the pipes to the shop though, just left them there for a bit until I can find a way to pick them up.

Danial · 10-29-2019, 12:36 AM

Everyone has their own dream for their car. I'm sure I've done a few things over the years that made people scratch their heads but hey, that's life.

Ashen L99 · 10-29-2019, 01:52 AM

Cut the secondary cats off, weld in some straight pipe where they were, then undo the clamps. That should fix the CEL. You will need to support the downpipe as it has flexpipe at the top.
Do not throw away that cat back!

Disclaimer: I never ran with the open downpipe’s but with NPP hooked up I could tell a noticeable difference in sound with a secondary cat delete.

Pic of my modified cats before I did longtubes

SlingShot · 10-29-2019, 08:50 AM

All I can say is WTF were you thinking, bet it sounds like an old dump truck now. For some reason I take it you are very young...

jeff657756 · 10-29-2019, 09:06 AM

lol

10-28-2019, 10:15 PM	#1
Teeth Drives: 2010 Chevrolet Camaro SS Join Date: Sep 2019 Location: Phoenix, AZ Posts: 234 View My Garage	Did an entire exhaust delete, catback Reposting this from the exhaust forum, with pics Cut off the exhaust from the O2 sensor to make it stupid loud, but still in legal limits for my state. But I guess I should get it tuned yeah? Engine light is on. Also the keyfob doesn't start the car. There's a click of the ignition, but nothing, needs manual start. Any thoughts? Attached Images

10-29-2019, 12:13 AM	#9
InFiD3ViL Drives: 2010 CGM 2SS/RS LS3 Swapped A6 Join Date: Sep 2016 Location: Spring Hill, FL Posts: 4,737	Wow. I hope you didn't just give that old exhaust to the shop. That is not a crap exhaust. That is a fully stainless steel cat back Borla system with X pipe and J-pipes. You could have simply pulled the mufflers off at the rear and either replaced them with straight pipes AFTER the J Pipes and got the loudness you want but with a rear exit and no drone. The J Pipes are to eliminate the cabin drone that you are going to surely get now. Assuming you are not already tuned, that thing is going to sound like a farting monster when AFM/DOD engages. Like said above, if you have a check engine light on you cannot remote start the car. You will need to get those rear O2 sensors turned off in a tune. But, if you like it and can tolerate that drone and are happy with it...Your car your choice. __________________ 2010 CGM Camaro 2SS LS3 Swapped A6 - GPI LS3 SS1 .647/.638, (224/237, 112 +4, 7º overlap) on CamMotion 8620 core, BTR Platinum .660" Dual Spring kit w/titanium retainers, CHE bronze trunnion upgrade, stock heads milled @ .015, Melling HV 10296 oil pump, TSP 1-7/8" long tube headers (W/Catless Off-road Pipes), Corsa Xtreme 3" Catback, GPI Ported/Rod Mod Intake, Stage 2 Ported Throttle Body, Vararam OTR CAI, Mike Norris Gen 2 catch can + GM 1LE clean side separator, 160º thermostat - Megan Racing adjustable coilovers (lowered 1.75"), MRR M017 10/11" wheels-Tuned by Ryan @ GPI

10-29-2019, 01:52 AM	#12
Ashen L99 Drives: Ashen grey, 1SS, L99 Join Date: Aug 2016 Location: Oklahoma Posts: 549	Cut the secondary cats off, weld in some straight pipe where they were, then undo the clamps. That should fix the CEL. You will need to support the downpipe as it has flexpipe at the top. Do not throw away that cat back! Disclaimer: I never ran with the open downpipe’s but with NPP hooked up I could tell a noticeable difference in sound with a secondary cat delete. Pic of my modified cats before I did longtubes Attached Images __________________ Roto-fab big gulp, Nick Williams 102mm TB, Kong X-port LSA, Ported 821 heads, BTR stage 4 V2 pd cam, 416 CI bottom end, original block. TSP 2” long tubes, Corsa ZL-1 catback. Nitrous Outlet 102mm plate kit/100 shot JUST IN CASE. NGK BR7EF plugs with Taylor plug wires. DSX flex fuel kit, DSX aux pump, zl1 in tank. deatchwork 1000cc injectors. B&M deep trans pan, stock 6L90 converter, ZL1 diff 3.23 ratio. GM ground effects, T-Rex upper grill, Z/28 Spoiler, Forgestar F14s, 12” subwoofer, and custom paint matched interior.

10-29-2019, 08:50 AM	#13
SlingShot Drives: 2012 ZL1 - #670 Join Date: Jun 2009 Location: Seminole, Fl. Posts: 8,009	All I can say is WTF were you thinking, bet it sounds like an old dump truck now. For some reason I take it you are very young... __________________

10-29-2019, 09:06 AM	#14
jeff657756 Drives: 2014 SS 1LE Join Date: Apr 2014 Location: United States Posts: 660	lol __________________ https://instagram.com/jp_1le/

10-28-2019, 10:40 PM	#2
MrChrisLS3 Drives: 2018 1SS M6 Join Date: Nov 2014 Location: Houston Posts: 2,617	Engine light is on because the o2 sensor is exposed to outside air. It's probably reading lean condition. Remote start will not function if you have a CEL, which you do. There's a good chance you're going to get carbon monoxide inside the car if the exhaust is dumping out right there.

10-28-2019, 11:22 PM	#6
lemontwist Drives: 12 2SS/RS L99,11 2SS/RS LS3totaled Join Date: Jun 2019 Location: mooresville nc Posts: 1,048	that was a high dollar loud enough exhaust you just cutoff why not just take off the caps by the mufflers??? the hot exhaust is going to cook the tranny fluid. to each his own.......a guy at work has a charger 5.7 he did a "muffler delete" i think it sounds like a car the muffler fell off of LOL.

10-28-2019, 11:30 PM	#7
StingrayblueSS Drives: 2013 Camaro SS Join Date: Feb 2017 Location: Indiana Posts: 901	You could have unbolted the first set of clamps instead of instead of cutting where you did.

10-29-2019, 12:36 AM	#11
Danial Drives: 2013 SS/RS, 2015 Camaro SS/RS Vert Join Date: Sep 2019 Location: Southern Nevada Posts: 2,353 View My Garage	Everyone has their own dream for their car. I'm sure I've done a few things over the years that made people scratch their heads but hey, that's life.