Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums - Camaro5.com
 
TireRack
Go Back   Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums - Camaro5.com > Engine | Drivetrain | Powertrain Technical Discussions > Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons


Reply
 
Thread Tools
Old 05-11-2010, 01:08 PM   #1
topgun1

 
topgun1's Avatar
 
Drives: 10 SIM 2SS/RS LS3
Join Date: May 2008
Location: Winston-Salem, NC
Posts: 1,940
Hi-flow cats or cat-delete?

Question- if I do a cat-delete and do something like an X pipe, do I need to get the O2 eliminators? anyone have experience doing this? I want to get that powerful sound I'm looking for and let the new Doug Thorley headers breathe.

Inspection is not an issue
__________________
5th Gen Camaros of the Carolinas SIM, 2SS/RS LS3 5/7/11 453.9 RWHP 427.5 RWTQ
VMS Stage 2.5 Comp Cams kit, Cold Air Inductions intake, ADM race scoop, DT 1 3/4" headers, Solo cats, 3" Magnaflow catback, Pypes cutouts, HP tune, H&R SuperSport springs, Eibach sways/spacers, TexasSpeed UD pulley, LSR tensioner pulley, Barton shifter, skip shift eliminator, powder-coated calipers, R1 concept rotors, StopTech pads, Granatelli wires, Lloyds mats, tint, AAC afterburner taillamps, AAC scanner/sidemarkers, SRP pedals, custom engine cover, black bowties, Ridergraphix hood spears....
topgun1 is offline   Reply With Quote
Old 05-11-2010, 01:15 PM   #2
Topdown
The wait is over!
 
Topdown's Avatar
 
Drives: 2010 Camaro, IOM, L99, Auto
Join Date: Mar 2010
Location: Washington
Posts: 1,081
IMO - High-Flow cats...

I had thorleys, no cats, 2.5" and flowmaster delta-40's on my 1972 Blazer and it was awesome but it was a pre-cat vehicle.

Since then I have had good luck with HF Cats and similar exhaust on other Chevy's... and gotten what felt like the same amount of power.
__________________
Ordered - 4/17/2010
Delivered - 5/29/2010

AlphaDamp CLD Mat - Get more Sound Deadening with less Sound Deadener
Topdown is offline   Reply With Quote
Old 05-11-2010, 01:16 PM   #3
Mayhem Matt
 
Mayhem Matt's Avatar
 
Drives: 10' 2SS/RS M6 SUPERCHRGED BUMBLEBEE
Join Date: Jun 2009
Location: Orange CA
Posts: 607
Interestedin finding out some info on this as well!!
__________________
Ordered Bumblebee 10/15/2008Part of the Family 6/11/2009 #11423

My Bumblebee to Superbee build story...http://www.camaro5.com/forums/showthread.php?t=105163
Superbee's 536hp Dyno Run...http://www.youtube.com/watch?v=AE7wePluPAc
Mayhem Matt is offline   Reply With Quote
Old 05-11-2010, 01:21 PM   #4
coptzr
Resistance is futile
 
coptzr's Avatar
 
Drives: Anything thats fast
Join Date: May 2009
Location: Big Rapids,MI
Posts: 315
ok, on a previous post, Jannetty Racing compaired all popular headers with and without high flow cats and found NO difference in performance.So why not run them?? just curious.

heres the link
http://www.camaro5.com/forums/showth...ht=header+test
__________________
Modifications (so far)
Edelbrock E-Force supercharger
JRE fuel system upgrade
Edelbrock CAI
VMS stage 2.5 cam kit
SLP LT's, no cats
NPP muffler's w/x-pipe
Tuned at Vector Motorsports
606 RWHP and 567 RWT
Black 1LE 10 spokes.
Hotchkis drop springs.
coptzr is offline   Reply With Quote
Old 05-11-2010, 01:33 PM   #5
SS 376

 
SS 376's Avatar
 
Drives: IBM 1SS
Join Date: Feb 2009
Location: DFW
Posts: 1,970
Quote:
Originally Posted by coptzr View Post
ok, on a previous post, Jannetty Racing compaired all popular headers with and without high flow cats and found NO difference in performance.So why not run them?? just curious.

heres the link
http://www.camaro5.com/forums/showth...ht=header+test
Probably $$$. Hi flows are something like $400+, but two straight sections of pipe are what, $50?
SS 376 is offline   Reply With Quote
Old 05-11-2010, 01:35 PM   #6
topgun1

 
topgun1's Avatar
 
Drives: 10 SIM 2SS/RS LS3
Join Date: May 2008
Location: Winston-Salem, NC
Posts: 1,940
Quote:
Originally Posted by SS 376 View Post
Probably $$$. Hi flows are something like $400+, but two straight sections of pipe are what, $50?
true, but it does make it easier when you actually need them on the car for warranty work, inspection (If i move away from my local guy), trading, etc.

Would there be any noticeable sound difference b/w no cats and hi flow cats?

also, I don't believe DTH has an application yet for hiflow cats.
__________________
5th Gen Camaros of the Carolinas SIM, 2SS/RS LS3 5/7/11 453.9 RWHP 427.5 RWTQ
VMS Stage 2.5 Comp Cams kit, Cold Air Inductions intake, ADM race scoop, DT 1 3/4" headers, Solo cats, 3" Magnaflow catback, Pypes cutouts, HP tune, H&R SuperSport springs, Eibach sways/spacers, TexasSpeed UD pulley, LSR tensioner pulley, Barton shifter, skip shift eliminator, powder-coated calipers, R1 concept rotors, StopTech pads, Granatelli wires, Lloyds mats, tint, AAC afterburner taillamps, AAC scanner/sidemarkers, SRP pedals, custom engine cover, black bowties, Ridergraphix hood spears....
topgun1 is offline   Reply With Quote
Old 05-11-2010, 01:38 PM   #7
topgun1

 
topgun1's Avatar
 
Drives: 10 SIM 2SS/RS LS3
Join Date: May 2008
Location: Winston-Salem, NC
Posts: 1,940
Quote:
Originally Posted by coptzr View Post
ok, on a previous post, Jannetty Racing compaired all popular headers with and without high flow cats and found NO difference in performance.So why not run them?? just curious.

heres the link
http://www.camaro5.com/forums/showth...ht=header+test
thanks for posting this. I get people telling me all the time that you'll get signficant power increases with hi flow cats vs. stock. it's good to see real comparos. I'm really looking for the sound.
__________________
5th Gen Camaros of the Carolinas SIM, 2SS/RS LS3 5/7/11 453.9 RWHP 427.5 RWTQ
VMS Stage 2.5 Comp Cams kit, Cold Air Inductions intake, ADM race scoop, DT 1 3/4" headers, Solo cats, 3" Magnaflow catback, Pypes cutouts, HP tune, H&R SuperSport springs, Eibach sways/spacers, TexasSpeed UD pulley, LSR tensioner pulley, Barton shifter, skip shift eliminator, powder-coated calipers, R1 concept rotors, StopTech pads, Granatelli wires, Lloyds mats, tint, AAC afterburner taillamps, AAC scanner/sidemarkers, SRP pedals, custom engine cover, black bowties, Ridergraphix hood spears....
topgun1 is offline   Reply With Quote
Old 05-11-2010, 01:42 PM   #8
coptzr
Resistance is futile
 
coptzr's Avatar
 
Drives: Anything thats fast
Join Date: May 2009
Location: Big Rapids,MI
Posts: 315
Well the money is a very good point.But with no cats you will have to get that "tuned" out if your not running rear o2's correct?? thats what 300 to 450?? I know they say you should still tune with LT's, but you dont have to right?? I too am having the same issue and would like the same answers as "topdown"...thanks for all the help
__________________
Modifications (so far)
Edelbrock E-Force supercharger
JRE fuel system upgrade
Edelbrock CAI
VMS stage 2.5 cam kit
SLP LT's, no cats
NPP muffler's w/x-pipe
Tuned at Vector Motorsports
606 RWHP and 567 RWT
Black 1LE 10 spokes.
Hotchkis drop springs.
coptzr is offline   Reply With Quote
Old 05-11-2010, 01:59 PM   #9
MileMAN402
RIP JoePa
 
MileMAN402's Avatar
 
Drives: 2010 2SS/RS & 2001 Audi S4
Join Date: Apr 2010
Location: Central PA
Posts: 644
you'll need a tune eventually with hiflow cats too or the check engine light will come on. besides youll get a good deal more power if you add the tune
__________________
MileMAN402 is offline   Reply With Quote
Old 05-11-2010, 02:14 PM   #10
coptzr
Resistance is futile
 
coptzr's Avatar
 
Drives: Anything thats fast
Join Date: May 2009
Location: Big Rapids,MI
Posts: 315
Valid point.I know I have read in other post that some people say the light comes on and some dont.Sound like the tune is still the best bet.
__________________
Modifications (so far)
Edelbrock E-Force supercharger
JRE fuel system upgrade
Edelbrock CAI
VMS stage 2.5 cam kit
SLP LT's, no cats
NPP muffler's w/x-pipe
Tuned at Vector Motorsports
606 RWHP and 567 RWT
Black 1LE 10 spokes.
Hotchkis drop springs.
coptzr is offline   Reply With Quote
Old 05-11-2010, 02:34 PM   #11
victoryred1ss
 
victoryred1ss's Avatar
 
Drives: 2010 SS M6 2016 2SS A8
Join Date: Oct 2009
Location: Utah
Posts: 553
I had Hi-flow cats on then took them off and did straight pipes. You will get DTC's either way. Im going to reinstall cats because It has a very strange rattle rasp noise at about 3k rpms that I dont like since the straight pipes were installed.
__________________
TVS 2300 721RWHP 686RWTQ
Built by Me
Suspension done by JDP
Tune done by JRE
victoryred1ss is offline   Reply With Quote
Old 05-11-2010, 02:35 PM   #12
topgun1

 
topgun1's Avatar
 
Drives: 10 SIM 2SS/RS LS3
Join Date: May 2008
Location: Winston-Salem, NC
Posts: 1,940
Quote:
Originally Posted by coptzr View Post
Well the money is a very good point.But with no cats you will have to get that "tuned" out if your not running rear o2's correct?? thats what 300 to 450?? I know they say you should still tune with LT's, but you dont have to right?? I too am having the same issue and would like the same answers as "topdown"...thanks for all the help
topgun?

well a standard custom tune is usually $300-450 yes, and they can tune that out. If you delete the cats, you can get an O2 delete which would basically be just like a skip shift eliminator to trick the computer.

you should always tune when adding performance items on, like exhaust, headers and intake, and definitely a s/c, since your car's computer is still set on stock settings. you'll need to be able to have the computer learn your new performance items and take advantage of the potential power gains
__________________
5th Gen Camaros of the Carolinas SIM, 2SS/RS LS3 5/7/11 453.9 RWHP 427.5 RWTQ
VMS Stage 2.5 Comp Cams kit, Cold Air Inductions intake, ADM race scoop, DT 1 3/4" headers, Solo cats, 3" Magnaflow catback, Pypes cutouts, HP tune, H&R SuperSport springs, Eibach sways/spacers, TexasSpeed UD pulley, LSR tensioner pulley, Barton shifter, skip shift eliminator, powder-coated calipers, R1 concept rotors, StopTech pads, Granatelli wires, Lloyds mats, tint, AAC afterburner taillamps, AAC scanner/sidemarkers, SRP pedals, custom engine cover, black bowties, Ridergraphix hood spears....
topgun1 is offline   Reply With Quote
Old 05-11-2010, 02:35 PM   #13
MileMAN402
RIP JoePa
 
MileMAN402's Avatar
 
Drives: 2010 2SS/RS & 2001 Audi S4
Join Date: Apr 2010
Location: Central PA
Posts: 644
yeah, ive heard of people running hiflows for 4 or 5 hundred miles before the light comes on, but it should come on for everyone eventually since the cats arent heating up as much or as fast
__________________
MileMAN402 is offline   Reply With Quote
Old 05-11-2010, 02:37 PM   #14
topgun1

 
topgun1's Avatar
 
Drives: 10 SIM 2SS/RS LS3
Join Date: May 2008
Location: Winston-Salem, NC
Posts: 1,940
Quote:
Originally Posted by victoryred1ss View Post
I had Hi-flow cats on then took them off and did straight pipes. You will get DTC's either way. Im going to reinstall cats because It has a very strange rattle rasp noise at about 3k rpms that I dont like since the straight pipes were installed.

hmmm, this is discerning with that noise.

but did you have the O2 sensor eliminator and still got the codes?
__________________
5th Gen Camaros of the Carolinas SIM, 2SS/RS LS3 5/7/11 453.9 RWHP 427.5 RWTQ
VMS Stage 2.5 Comp Cams kit, Cold Air Inductions intake, ADM race scoop, DT 1 3/4" headers, Solo cats, 3" Magnaflow catback, Pypes cutouts, HP tune, H&R SuperSport springs, Eibach sways/spacers, TexasSpeed UD pulley, LSR tensioner pulley, Barton shifter, skip shift eliminator, powder-coated calipers, R1 concept rotors, StopTech pads, Granatelli wires, Lloyds mats, tint, AAC afterburner taillamps, AAC scanner/sidemarkers, SRP pedals, custom engine cover, black bowties, Ridergraphix hood spears....
topgun1 is offline   Reply With Quote
 
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
2010 Camaro w/ longtube Kooks headers, high flow race cats, and stock exhaust (video) Badger Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons 58 12-09-2012 07:25 AM
PWA "The Lounge" DGthe3 Off-topic Discussions 143773 11-06-2010 11:00 AM
NEW High Flow Cats COMING SOON from SOLO Performance GOINGSOLO2 Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons 414 07-24-2010 05:55 PM
Modern Muscle Exhaust and Intake Special modern-muscle V8 Bolt-Ons & Tunes 1 01-20-2010 06:46 PM
Muffler Delete Cat Back For Sale - $125 PU only! Legend V8 - Engine, Exhaust, Bolt-Ons, Tuning Equipment 15 12-25-2009 08:20 PM


All times are GMT -5. The time now is 04:48 PM.


Powered by vBulletin® Version 3.8.9 Beta 4
Copyright ©2000 - 2016, vBulletin Solutions, Inc.