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06-04-2016, 03:25 AM
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#1 |
 
Drives: 2014 Crystal Red 1LE 2SS Join Date: Jun 2015
Location: US
Posts: 132
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How much supercharged rwhp before high flow cats melt?
What's the safe limit for high flow cats on a supercharged ls3? I've read about meltdowns and I am curious.
.....and for guys that have them removed how bad is the fuel smell? |
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06-04-2016, 06:23 AM
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#2 |
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I.AM.
Drives: 2011 2SS/RS/A6 cammed-n-whippled Join Date: Oct 2008
Location: NY
Posts: 2,638
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I'm at 625rwhp with no issues (ARH cats), but also depends on how you drive, your tune, and other mods (like stock cam or not)
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NY5thgen.com
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06-04-2016, 07:02 AM
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#3 |
 
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The common belief is around the 600s for cats. I can say I have personally not seen an ARH cat melt. I don't know the manufacturing process but they have proven to be a little better most from what I've seen. I know this is and has been a huge concern for many for a long time.
I use an inspection camera to check cats as well as numerous other components. Frquent checks can give you an early warning to any potential problems. |
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06-04-2016, 07:18 AM
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#4 |
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Drives: 2014 Crystal Red 1LE 2SS Join Date: Jun 2015
Location: US
Posts: 132
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I guess how you drive would dictate a lot as well. If you're at the track with lots of heavy exceleration for extended amounts of time that can't be good for the cats. Makes sense.
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06-04-2016, 07:26 AM
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#5 | |
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I.AM.
Drives: 2011 2SS/RS/A6 cammed-n-whippled Join Date: Oct 2008
Location: NY
Posts: 2,638
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Quote:
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NY5thgen.com
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06-04-2016, 09:24 AM
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#6 |
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Drives: 1999 Trans Am Join Date: Jul 2009
Location: Bridgewater,Ma
Posts: 2,017
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I've seen pretty much all of them push back. Usually 550+ hp. Some don't but I would not risk it.
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06-04-2016, 01:31 PM
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#7 |
  Drives: 2010 Camaro SS Join Date: Dec 2006
Location: MN
Posts: 1,172
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I tried to go catless. Couldn't stand the stink. I put on some Eastern Catalytic high flows. Not too many miles yet. We'll see how they hold up.
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06-04-2016, 04:50 PM
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#8 |
 
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Mine melted at 655
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2012 Camaro SS Automatic
AGP Twin Turbo LSX427 / ADM Magic / 4L80 “1360 Rwhp 1225 Rwtq 25 lbs of boost” |
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06-05-2016, 08:58 AM
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#9 |
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Too much is never enough!
Drives: AGP TT SS [COTW] 4/20/15 Join Date: Feb 2014
Location: Toledo,OH
Posts: 4,149
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From my understanding, its more about the tune, than the power.
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AGP TT kit, 54/57 Forged rotating assembly, Custom grind cam... Dual nozzle meth, ID850's, Livernois dual fuel pumps, ECS BAP, 25% UDP, 3 inch Magnaflow catback with X pipe, Mantic 9000 clutch, DSS 1000hp axles, DSS aluminum driveshaft, ZL1 rear end, solid subframe bushings, HE differential offset bushings, BMR Trailing arm, BMR toe rods, Lingenfelter LNC-2000,SJM Line Lock. 747 whp 714wtq
Build thread http://www.camaro5.com/forums/showth...55#post8107855 |
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06-05-2016, 09:45 AM
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#10 |
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Pro Hide n Seek Player
Drives: 2010 SS LS3/LSA 620whp/630tq Join Date: May 2009
Location: Tucson, AZ
Posts: 921
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all I smell with no cats is speed. hot nasty speed.
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 620whp/630wtq. ADM LSA Conversion, E85, PFADT Tri-Y Headers into Borla S, PFADT Swaybars, Springs, Links, 20x10 20x11 Forgestar F14s, Lots of AAC |
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06-05-2016, 12:47 PM
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#11 |
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So if I plan to go 650 to 700 whp I should not get cats with my headers. Correct?
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06-05-2016, 12:50 PM
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#12 |
       Drives: 2006 Z06 Join Date: Oct 2010
Location: Gilbert, AZ
Posts: 5,712
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IMO, that is correct.
I wouldnt risk it, as a melted cat can easily take out a motor.
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Nick
Corvette Z06 -1200ish rwhp |
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06-05-2016, 03:20 PM
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#13 | |
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Too much is never enough!
Drives: AGP TT SS [COTW] 4/20/15 Join Date: Feb 2014
Location: Toledo,OH
Posts: 4,149
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Quote:
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AGP TT kit, 54/57 Forged rotating assembly, Custom grind cam... Dual nozzle meth, ID850's, Livernois dual fuel pumps, ECS BAP, 25% UDP, 3 inch Magnaflow catback with X pipe, Mantic 9000 clutch, DSS 1000hp axles, DSS aluminum driveshaft, ZL1 rear end, solid subframe bushings, HE differential offset bushings, BMR Trailing arm, BMR toe rods, Lingenfelter LNC-2000,SJM Line Lock. 747 whp 714wtq
Build thread http://www.camaro5.com/forums/showth...55#post8107855 |
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06-05-2016, 07:25 PM
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#14 |
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I ran OBX cats for about 2.5 years, at 600+RWHP, and when I finally decided to punch them out, due to all the "melted catalyst" threads, there wasn't a single hint of any issue with the cats. Granted, the car doesn't live at the track, as its my daily driver, but it does see spirited WOT runs at least in the first 2-3 gears, almost daily.
I, also, love the smell...especially 108 Octane! It smells intoxicating!
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745RWHP/634RWTQ on 93 @ 10psi
806/676 on E85 @ 10psi  COTW 9/8/14 |
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