would removing two cats help? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

SS>GT · 03-15-2011, 04:11 PM

i noticed that even though the camaro has 4 cats, the sensor is after the first set. There doesnt seem to be a sensor after he second set.

Question is, is it worth it to remove the last two cats? would it affect HP, Engine lights, etc..?

Any help appreciated.

ZED SLED · 03-15-2011, 04:14 PM

You would probably get a better answer in the exhaust section.

DarkneSS · 03-15-2011, 04:15 PM

Removing cats will always increase horsepower. Not sure if they will throw a code though...

1bad65 · 03-15-2011, 04:18 PM

On my car if you remove the back 2 cats, you will get a Check Engine light. If you turn off those two O2 sensors with a tuner the Check Engine light will go off, but you will get 2 "Not Ready" errors when you hook it up to the computer to get the car checked for a vehicle inspection. Not all States/counties/cities require the car to be hooked up though, so I'd suggest you do some research before removing them.

upflying · 03-15-2011, 04:19 PM

Since you live in LA, you can bet the smog check visual inspection will catch the missing cats.

mikeSS · 03-15-2011, 04:20 PM

high flow cats, come with one cat. and tons of people are not throwing codes.

Russell James · 03-15-2011, 04:25 PM

I think a high flow single cat is a better option. Bolt in. That way you are leaving your OE cat pipes intact. And if you ever need to put it back to 100% stock it will be easy. Cut between the two cats, and tough and expensive to return to stock.

mrh923 · 03-15-2011, 04:35 PM

I just ordered the high flow cats from solo performance. They say that it won't throw a code and it increases the sound and performance. Somewhere around 25 for both HP and torque increase.

bmorecam · 03-15-2011, 04:52 PM

So if a company like bbk is saying that their long tube will give you a gain of up to 30hp with high flow cat than does that mean that 30hp number will go up with no cats? I know with turbo cars getting rid of the cats will give you alot of extra horses from my past experience but I heard that you will not see too much of a difference with a n/a car with no cats. Maybe someone with more expertise can verify?

SS>GT · 03-15-2011, 05:04 PM

Quote:

Originally Posted by mrh923

I just ordered the high flow cats from solo performance. They say that it won't throw a code and it increases the sound and performance. Somewhere around 25 for both HP and torque increase.

Is that 25hp because you have an intake and exhaust, or 25hp on stock?

mrh923 · 03-15-2011, 05:12 PM

That's stock I believe. But you should look at their website. They've got the dyno sheet on there. They are 575 but Maryland speed has the jba high flows for 392.

Steve Dallas · 03-15-2011, 05:25 PM

sad cat is sad!

1bad65 · 03-15-2011, 05:29 PM

Quote:

Originally Posted by mikeSS

high flow cats, come with one cat. and tons of people are not throwing codes.

I should have been more specific. When you remove them, you throw a code. When you put hi-flow cats on, you don't throw a code.

Also, one cat? I have two on mine, I just assumed the V8 Camaros would need two as well. My hi-flows are small, about the size of a fist.

ViperTomcat · 03-15-2011, 05:30 PM

03-15-2011, 04:11 PM	#1
SS>GT Drives: 2010 Camaro SS Join Date: Jan 2011 Location: Los Angeles Posts: 205	would removing two cats help? i noticed that even though the camaro has 4 cats, the sensor is after the first set. There doesnt seem to be a sensor after he second set. Question is, is it worth it to remove the last two cats? would it affect HP, Engine lights, etc..? Any help appreciated. __________________ 2010 camaro 2ss LS3 Corsa catback exhaust w/muffler delete, hennessey intake, Pfadt springs, Hurst Short throw Shifter, Murdered black. GO TEAM LS3

03-15-2011, 04:14 PM	#2
ZED SLED Drives: 2017 Mosaic Bk ZL1 M6 Join Date: Jul 2009 Location: South of Raleigh, NC Posts: 9,614 View My Garage	You would probably get a better answer in the exhaust section. __________________

03-15-2011, 04:35 PM	#8
mrh923 Drives: 2011 Camaro 1SS/M6 Cyber Gray Met. Join Date: Jan 2011 Location: Navarre, FL/Emerald Coast Posts: 624 View My Garage	I just ordered the high flow cats from solo performance. They say that it won't throw a code and it increases the sound and performance. Somewhere around 25 for both HP and torque increase. __________________ 2011 1SS/LS3 M6--Vararam CAI-Corsa catback-Dynatech LTs-RX Catch Can-Vmax ported TB-Eibach Springs-Night Fury Camshaft- 486RWHP/458 TQ

03-15-2011, 05:12 PM	#11
mrh923 Drives: 2011 Camaro 1SS/M6 Cyber Gray Met. Join Date: Jan 2011 Location: Navarre, FL/Emerald Coast Posts: 624 View My Garage	That's stock I believe. But you should look at their website. They've got the dyno sheet on there. They are 575 but Maryland speed has the jba high flows for 392. __________________ 2011 1SS/LS3 M6--Vararam CAI-Corsa catback-Dynatech LTs-RX Catch Can-Vmax ported TB-Eibach Springs-Night Fury Camshaft- 486RWHP/458 TQ

03-15-2011, 05:25 PM	#12
Steve Dallas Commits weekly crime Drives: 2017 Camaro 1LT Join Date: Nov 2009 Location: Camano Island, WA Posts: 9,513 View My Garage	sad cat is sad! __________________ 2017 Camaro 1LT - Blue Barchetta IV I fire up the willing engine, responding with a roar. Tires spitting gravel I commit my weekly crime.

03-15-2011, 04:15 PM	#3
DarkneSS Account Suspended Drives: 2010 Camaro 2SS/RS 6MT Join Date: Apr 2010 Location: Westchester, New York Posts: 3,715	Removing cats will always increase horsepower. Not sure if they will throw a code though...

03-15-2011, 04:18 PM	#4
1bad65 Banned Drives: 2007 Mustang GT Join Date: Jul 2009 Location: Austin Posts: 1,148	On my car if you remove the back 2 cats, you will get a Check Engine light. If you turn off those two O2 sensors with a tuner the Check Engine light will go off, but you will get 2 "Not Ready" errors when you hook it up to the computer to get the car checked for a vehicle inspection. Not all States/counties/cities require the car to be hooked up though, so I'd suggest you do some research before removing them.

03-15-2011, 04:19 PM	#5
upflying Drives: '86 Monte Carlo SS Join Date: Nov 2010 Location: Reno, NV Posts: 3,119	Since you live in LA, you can bet the smog check visual inspection will catch the missing cats.

03-15-2011, 04:20 PM	#6
mikeSS Drives: 2015 c7 Join Date: Nov 2009 Location: MI Posts: 7,462	high flow cats, come with one cat. and tons of people are not throwing codes.

03-15-2011, 04:25 PM	#7
Russell James Drives: '15 SS 1LE, '69 Z28 drag car Join Date: Dec 2009 Location: Mich Posts: 4,482	I think a high flow single cat is a better option. Bolt in. That way you are leaving your OE cat pipes intact. And if you ever need to put it back to 100% stock it will be easy. Cut between the two cats, and tough and expensive to return to stock.

03-15-2011, 04:52 PM	#9
bmorecam Account Suspended Drives: jealous vendors mad!! HAHA!! Join Date: Jan 2011 Location: CYBERGMONSTER@GMAIL.COM Posts: 3,658 View My Garage	So if a company like bbk is saying that their long tube will give you a gain of up to 30hp with high flow cat than does that mean that 30hp number will go up with no cats? I know with turbo cars getting rid of the cats will give you alot of extra horses from my past experience but I heard that you will not see too much of a difference with a n/a car with no cats. Maybe someone with more expertise can verify?

03-15-2011, 05:30 PM	#14
ViperTomcat Banned Drives: 2011 Avenger Heat Join Date: Nov 2009 Location: Oregon Posts: 1,697

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