Catless question. - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

2K13_ZL1_BLove · 06-26-2015, 12:12 AM

So I plan on installing Jba catless mid pipes. Now I know that I will get a CEL. Does the car have to be tuned on a dyno, or can I use a hand held tuner and just turn the rear 02 sensors off? Other mods are ported vmaxx tb and roto-fab intake.

Stephen12ZL1 · 06-26-2015, 07:46 AM

someone like Jannetty could easily tune for no cats remotely using a hand held tuner. Tuning on the dyno is most ideal as the fueling can be adjusted for the lack of cats, but not entirely necessary.

96ss1664 · 06-26-2015, 08:47 AM

Quote:

Originally Posted by 2K13_ZL1_BLove

So I plan on installing Jba catless mid pipes. Now I know that I will get a CEL. Does the car have to be tuned on a dyno, or can I use a hand held tuner and just turn the rear 02 sensors off? Other mods are ported vmaxx tb and roto-fab intake.

I have set of JBA catless mid pipes if your looking. Has about 2K miles on them.

If you know someone that has HP Tuners or something comparable, you could just turn the O2's off. But you would gain more with having someone tune it.

mat300z · 06-26-2015, 08:59 AM

Going catless is obnoxiously loud and not the good kind. I haven't heard a setup without cats that sounds good. A lot of people will run a resonated x pipe but I didn't have any luck with the catless setup

dtwolcot2 · 06-26-2015, 01:29 PM

Quote:

Originally Posted by mat300z

Going catless is obnoxiously loud and not the good kind. I haven't heard a setup without cats that sounds good. A lot of people will run a resonated x pipe but I didn't have any luck with the catless setup

Your opinion. I have no cats and long tubes and to me it sounds awesome. Plenty of others will agree too.

krisprz2010camaross · 06-26-2015, 01:42 PM

Yah no cats and long tubes sound great to me. Maybe if you don't have mufflers then it wouldn't sound as good.

2K13_ZL1_BLove · 06-26-2015, 02:47 PM

Yeah I agree that full dyno would be the best option as far as power and setting fuel ratios. I have a wideband air fuel gauge so that will help in the tuning process. I also forgot to mention that i have a corsa catback going on the car with the midpipes.

shibbs · 06-26-2015, 02:55 PM

A dyno tune won't necessarily get you tons of additional power, (generally within 5hp,) but it will definitely get you a smoother power curve, and better drivability. Not to undermine Janetty, he's been doing this for a while, but a good tuner on a dyno will always be better than the same tuner via email.

As for LTs and no cats, I think it's great with the stock catback. No drone, shuts up really quiet on the freeway, and makes plenty of noise when you're high up in the revs.

Alfieboy · 06-26-2015, 04:51 PM

Quote:

Originally Posted by mat300z

Going catless is obnoxiously loud and not the good kind. I haven't heard a setup without cats that sounds good. A lot of people will run a resonated x pipe but I didn't have any luck with the catless setup

my 14 zl1 runs no cats,long tubes, loud, yes..controllable..yes

Todd in Vancouver · 06-27-2015, 07:17 PM

I am looking at this exact situation right now for my car. I'm thinking of going catless more out of concern that poor quality cats may cause enfine damage then anything else. I drive my ZL a lot, about 25K miles per year, and I don't want any hassles. Thinking Ilugot catless and if too loud I can always add them back in later.

Thoughts?nfeedback and sound clips would be appreciated.

FASTDIESEL · 06-27-2015, 10:12 PM

Quote:

Originally Posted by dtwolcot2

Your opinion. I have no cats and long tubes and to me it sounds awesome. Plenty of others will agree too.

^^ This^^

2K13_ZL1_BLove · 06-28-2015, 03:32 AM

So question is. Do I do my catless mids and corsa and do it with a handheld tuner and just shut off rear O2's? Or throw it on a dyno?

06-26-2015, 12:12 AM	#1
2K13_ZL1_BLove Drives: 2013 Summit White ZL1 Join Date: Jun 2014 Location: Peotone, IL Posts: 106	Catless question. So I plan on installing Jba catless mid pipes. Now I know that I will get a CEL. Does the car have to be tuned on a dyno, or can I use a hand held tuner and just turn the rear 02 sensors off? Other mods are ported vmaxx tb and roto-fab intake.

06-26-2015, 07:46 AM	#2
Stephen12ZL1 Drives: '21 ZLE A10 Join Date: May 2012 Location: Mechanicsville, VA Posts: 6,824	someone like Jannetty could easily tune for no cats remotely using a hand held tuner. Tuning on the dyno is most ideal as the fueling can be adjusted for the lack of cats, but not entirely necessary. __________________ '21 ZLE A10 Wild Cherry PDR 2:00.78 VIR Full 10.68@131.69 1.68 60' '17 ZL1 A10 Mosaic Black PDR/Nav 2:03.08 VIR Full 11.003@129.2 1.75 (sold) '15 Z/28 #325 Black a/c & stereo. 2:10.1 VIR Full (sold) '12 ZL1 A6 Black 10.52@131 1.55 60' 2:13 VIR Full (sold)

06-26-2015, 01:42 PM	#6
krisprz2010camaross Drives: 2010 Camaro 2ss/Rs Transformers Join Date: Aug 2014 Location: Yorba Linda, California Posts: 1,561	Yah no cats and long tubes sound great to me. Maybe if you don't have mufflers then it wouldn't sound as good. __________________ YouTube:Krisprz garage Insta:kris__perez & krisprz_garage LS3 conversion Vararam intake(tune model) Kooks LT headers & cats delete Corsa ZL1 3" exhaust RedBarn Racing Tune CMS Stage 3 Cam AFR CNC ported heads MSD Spark plug wires LNC-2000 Launch controller NGK TR6 Spark Plugs 1le strut tower brace-TPIS spacers Nick Williams 102mm throttle body Fast lsxr 102 intake manifold Slp 25% UDP Katech Tensioner Pulley Circle D 3600-3700 multi disk Stall GM 3.91 gears DDS carbon fiber driveshaft ZL1 fuel pump & injectors Flex fuel sensor(91/E85) https://wheelwell.com/kris-perez

06-27-2015, 07:17 PM	#10
Todd in Vancouver Drives: 2014 ZL1 Join Date: Oct 2013 Location: Vancouver, BC Posts: 1,538 View My Garage	I am looking at this exact situation right now for my car. I'm thinking of going catless more out of concern that poor quality cats may cause enfine damage then anything else. I drive my ZL a lot, about 25K miles per year, and I don't want any hassles. Thinking Ilugot catless and if too loud I can always add them back in later. Thoughts?nfeedback and sound clips would be appreciated. __________________ Todd in Vancouver '14 ZL1 Camaro '67 Camaro SS Pro-tour in process How hard can it be... Check out my other build http://www.pro-touring.com/threads/9...ject-Obsession

06-26-2015, 08:59 AM	#4
mat300z Emerald Coast Camaro's Drives: 2014 ZL1 Join Date: Dec 2011 Location: P.C.B. Florida Posts: 815	Going catless is obnoxiously loud and not the good kind. I haven't heard a setup without cats that sounds good. A lot of people will run a resonated x pipe but I didn't have any luck with the catless setup

06-26-2015, 02:47 PM	#7
2K13_ZL1_BLove Drives: 2013 Summit White ZL1 Join Date: Jun 2014 Location: Peotone, IL Posts: 106	Yeah I agree that full dyno would be the best option as far as power and setting fuel ratios. I have a wideband air fuel gauge so that will help in the tuning process. I also forgot to mention that i have a corsa catback going on the car with the midpipes.

06-28-2015, 03:32 AM	#12
2K13_ZL1_BLove Drives: 2013 Summit White ZL1 Join Date: Jun 2014 Location: Peotone, IL Posts: 106	So question is. Do I do my catless mids and corsa and do it with a handheld tuner and just shut off rear O2's? Or throw it on a dyno?