Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums - Camaro5.com
 
BeckyD@RodgersChevrolet
Go Back   Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums - Camaro5.com > Engine | Drivetrain | Powertrain Technical Discussions > Forced Induction - V8

Forced Induction - V8 V8 Supercharger, turbo, nitrous discussions

Reply
 
Thread Tools
Old 08-08-2013, 01:06 PM   #1
pdiddy
 
Drives: 2011 2SS
Join Date: Jun 2013
Location: Kansas City
Posts: 536
drilling out cats to do or not to do

so first is there a disadvantage to drilling out high flow cats over running the off road mid pipes besides the work to do it and second how are you guys drilling them out just a big drill bit and going to town or any other secrets to doing this.
__________________
2011 2SS JBA LONG TUBE, JBA HIGH FLOW CATS AND 3" EXHAUST, CAI CAI, 3.91 GEARS 18" cf5 NITTO NT555R, Bmr TRAILING ARMS, AND BUSHINGS, DYNO TUNED AT 408 RWHP/ ADDED A MAGGIE WITH 3.6 PULLEY ZL1 PUMP FIC 63# injectors ADM FPCM DYNO TUNED AT 570 RWHP AND 550 RWTQ ADDDED CUSTOM CAM FROM TICK AND OD COG WITH 3.8 FRONT MAKING 650RWHP AT 10psi
pdiddy is offline   Reply With Quote
Old 08-08-2013, 01:16 PM   #2
SSMickey
SECC
 
SSMickey's Avatar
 
Drives: 2010 IBM 2SS
Join Date: Feb 2010
Location: Columbia S.C.
Posts: 1,430
No advantage to be had IMO. Just get some off road pipes and be done with it. You can then sell you CAT's, make a few bucks or hold them in case you move to a place that does emissions testing.
__________________
Vengeance Stage II Cam, Halltech CAI, RX Catch Can, Full ARH Exhaust, QTP Cutouts, Powerbond 25% Underdrive, MGW Shifter, MTI Drop Springs, Forgeline RB3C Wheels, 3.91 gears, Night Owl LED Control System
SSMickey is offline   Reply With Quote
Old 08-08-2013, 01:24 PM   #3
DarkCry956
 
DarkCry956's Avatar
 
Drives: 2011 Camaro 2SS/RS
Join Date: Oct 2011
Location: Texas RGV
Posts: 616
I cut the connections to my Kooks high flow cats and welded a pipe the same size as it was previously.
DarkCry956 is offline   Reply With Quote
Old 08-08-2013, 01:29 PM   #4
pdiddy
 
Drives: 2011 2SS
Join Date: Jun 2013
Location: Kansas City
Posts: 536
ya I have them posted for sale but if they dont sell in the next few days I am probably just going to drill them out
__________________
2011 2SS JBA LONG TUBE, JBA HIGH FLOW CATS AND 3" EXHAUST, CAI CAI, 3.91 GEARS 18" cf5 NITTO NT555R, Bmr TRAILING ARMS, AND BUSHINGS, DYNO TUNED AT 408 RWHP/ ADDED A MAGGIE WITH 3.6 PULLEY ZL1 PUMP FIC 63# injectors ADM FPCM DYNO TUNED AT 570 RWHP AND 550 RWTQ ADDDED CUSTOM CAM FROM TICK AND OD COG WITH 3.8 FRONT MAKING 650RWHP AT 10psi
pdiddy is offline   Reply With Quote
Old 08-08-2013, 11:45 PM   #5
DarkCry956
 
DarkCry956's Avatar
 
Drives: 2011 Camaro 2SS/RS
Join Date: Oct 2011
Location: Texas RGV
Posts: 616
Mine didn't sell and even if they did I would've just got what the off road pipes would of cost. Which was fine with me but then I would've had to wait for shipping and what not. I just cut them and was on my way
DarkCry956 is offline   Reply With Quote
Old 08-09-2013, 11:07 AM   #6
pdiddy
 
Drives: 2011 2SS
Join Date: Jun 2013
Location: Kansas City
Posts: 536
Ya Dark thats the same delima I am in if they sell it will be for enough to buy off road pipes, or i could just drill/punch out my cats now put them on and be done with it. I just dont want the car to sound bad I am not sure how hollowed out high flow cats will change the sound over some off road pipes.
__________________
2011 2SS JBA LONG TUBE, JBA HIGH FLOW CATS AND 3" EXHAUST, CAI CAI, 3.91 GEARS 18" cf5 NITTO NT555R, Bmr TRAILING ARMS, AND BUSHINGS, DYNO TUNED AT 408 RWHP/ ADDED A MAGGIE WITH 3.6 PULLEY ZL1 PUMP FIC 63# injectors ADM FPCM DYNO TUNED AT 570 RWHP AND 550 RWTQ ADDDED CUSTOM CAM FROM TICK AND OD COG WITH 3.8 FRONT MAKING 650RWHP AT 10psi
pdiddy is offline   Reply With Quote
Old 08-09-2013, 11:27 AM   #7
DarkCry956
 
DarkCry956's Avatar
 
Drives: 2011 Camaro 2SS/RS
Join Date: Oct 2011
Location: Texas RGV
Posts: 616
I didn't notice any sound difference
DarkCry956 is offline   Reply With Quote
Old 08-09-2013, 12:36 PM   #8
Sikoriko

 
Sikoriko's Avatar
 
Drives: 2011 V6 IOM
Join Date: Jul 2012
Location: San Diego
Posts: 1,388
Those cats are expensive, need a loan just to buy them. Just replace with a pipe use the cash for a mod.
Sikoriko is offline   Reply With Quote
Old 08-09-2013, 02:06 PM   #9
pdiddy
 
Drives: 2011 2SS
Join Date: Jun 2013
Location: Kansas City
Posts: 536
ya I already had the cats previous owner put them on when he did the exhaust no way I would have paid for them, I ordered the off road pipes to put in there they where 250 I am not sure how much an exhaust shop would have charged to match a pipe up to my headers since its flanged I figure i would have been 200 deep pretty quick if they would have done it so I will just roll with the off road pipe for now and keep my cats for down the road.
__________________
2011 2SS JBA LONG TUBE, JBA HIGH FLOW CATS AND 3" EXHAUST, CAI CAI, 3.91 GEARS 18" cf5 NITTO NT555R, Bmr TRAILING ARMS, AND BUSHINGS, DYNO TUNED AT 408 RWHP/ ADDED A MAGGIE WITH 3.6 PULLEY ZL1 PUMP FIC 63# injectors ADM FPCM DYNO TUNED AT 570 RWHP AND 550 RWTQ ADDDED CUSTOM CAM FROM TICK AND OD COG WITH 3.8 FRONT MAKING 650RWHP AT 10psi
pdiddy is offline   Reply With Quote
Old 08-09-2013, 02:12 PM   #10
Unreal


 
Drives: 2006 Z06
Join Date: Oct 2010
Location: Gilbert, AZ
Posts: 2,720
Just get a piece of pipe. Taking them to a metal recycler would get you enough to not justify drilling them out. Cats aren't cheap.
__________________
Nick
Corvette Z06 -1116rwhp
Unreal is offline   Reply With Quote
Old 08-09-2013, 06:14 PM   #11
old motorhead

 
Drives: Maggie blown LS3 vette
Join Date: Aug 2009
Location: SE TX
Posts: 1,313
The only reason to use the hollowed out carcasses would be to pass a "visual" test at your next inspection. If that's not necessary, sell them for what you can get, and put o/r pipes in their place.
old motorhead 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


All times are GMT -5. The time now is 05:43 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.