high flow cats, longevity?
Thread Starter
Safety Car
Joined: Mar 1999
Posts: 3,602
Likes: 170
From: Toronto, Canada
high flow cats, longevity?
In high hp applications with meth and a fat air fuel ratio what would be the typical life span of a high flow catalytic converter? Do these things last or is a just a matter of time? Also, what kind of indication should you look for aside for being down on power that they are clogged?
Drifting
Joined: Dec 2003
Posts: 1,922
Likes: 0
cats
I dont know why you dont check with your tuner? He is probably the most knowledgeable guys in toronto, (Rob Ing of Champions)
I am on my 3rd year with mine, and one is bad.
but I found a used set cheap!!! thanks Dino of Grandsport...
HRTBRCR
I am on my 3rd year with mine, and one is bad.
but I found a used set cheap!!! thanks Dino of Grandsport...HRTBRCR
Pro
Joined: Jan 2002
Posts: 741
Likes: 9
From: Rancho Cordova CA
I have had three melt shut. One just after my last engine build and after tunning. I replaced both which lasted about 10 months and then I started hearing a rattling from them and had reduced power. They had both melted shut and seperated from the sides of the pipes. I wish I could find some that would last. I was using Dynotechs.
Thread Starter
Safety Car
Joined: Mar 1999
Posts: 3,602
Likes: 170
From: Toronto, Canada
Why ask one person when I can ask thousands
You reported a failed cat after a few years with the limited mileage you put on your car. Any clue why it went bad?I have had three melt shut. One just after my last engine build and after tunning. I replaced both which lasted about 10 months and then I started hearing a rattling from them and had reduced power. They had both melted shut and seperated from the sides of the pipes. I wish I could find some that would last. I was using Dynotechs.
Drifting
Joined: Dec 2003
Posts: 1,922
Likes: 0
cats
Why ask one person when I can ask thousands ??
Are those the same thousands that helped you with your fuel system?
You reported a failed cat after a few years with the limited mileage you put on your car. Any clue why it went bad?
my mileage is about 7000 kms a yr...the heat cycling usually does
the damage...I have had the same cats for about 4 years now...thats almost
30k which aint bad...installing some low mileage replacements next week
if Fernando is available...200 well spent
??Are those the same thousands that helped you with your fuel system?
You reported a failed cat after a few years with the limited mileage you put on your car. Any clue why it went bad?
my mileage is about 7000 kms a yr...the heat cycling usually does
the damage...I have had the same cats for about 4 years now...thats almost
30k which aint bad...installing some low mileage replacements next week
if Fernando is available...200 well spent
Last edited by HRTBRCR; Sep 30, 2009 at 11:00 PM.
Pro
Joined: Jan 2002
Posts: 741
Likes: 9
From: Rancho Cordova CA
I am not using the rear O2s?
I have replaced two sets of Dynotech cats.
I did not have overheating issues just the rattling noise coming from the cats. My car runs pretty cool with a Be Cool radiator and stand alone oil and trans coolers.
I have replaced two sets of Dynotech cats.
I did not have overheating issues just the rattling noise coming from the cats. My car runs pretty cool with a Be Cool radiator and stand alone oil and trans coolers.
Last edited by Steve'01; Oct 1, 2009 at 04:12 PM.
Melting Slicks
Joined: Feb 2006
Posts: 2,163
Likes: 5
From: Houston
I've been running Kooks for about 5k hard miles. 2500 has been with FI. Running lean is what usually really kills cats. When I was NA they started making a little noise at 13.0AFR, but they are still holding up for now.
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Pro
Joined: Jan 2009
Posts: 509
Likes: 0
From: Saskatoon
This is a good thread.
I have a car that came from Houston to Western Canada. Its an SD tune and it hasn't been properly tuned since being here (fuel system issues all summer). My exhaust has started to sound weird over time and I'm starting to think that maybe that cats are clogged, or maybe just one. Vacuum at idle is down and the boost gauge hits boost alot faster now...
I don't really want to replace the cats with more cats that might get bunged up again, however I also don't want to just put straigh pipe through there....I don't think I could handle the noise.
Kooks 1"7/8 headers w/ catted high-flow midsection matched up to Borla Stinger.
I have a car that came from Houston to Western Canada. Its an SD tune and it hasn't been properly tuned since being here (fuel system issues all summer). My exhaust has started to sound weird over time and I'm starting to think that maybe that cats are clogged, or maybe just one. Vacuum at idle is down and the boost gauge hits boost alot faster now...
I don't really want to replace the cats with more cats that might get bunged up again, however I also don't want to just put straigh pipe through there....I don't think I could handle the noise.
Kooks 1"7/8 headers w/ catted high-flow midsection matched up to Borla Stinger.
Melting Slicks
Joined: Feb 2006
Posts: 2,184
Likes: 2
In high hp applications with meth and a fat air fuel ratio what would be the typical life span of a high flow catalytic converter? Do these things last or is a just a matter of time? Also, what kind of indication should you look for aside for being down on power that they are clogged?
smashing in my town.
Pro
Joined: Dec 2004
Posts: 600
Likes: 0
From: Sudbury Ontario
Mine are cooked after 3 years...two years with over 800+ rwhp...you get slower response with boost and lower rwhp numbers...and it was tuned by an great tuner so its on the safe side...I was told that they wouldn't last when there were installed...their kooks high flow cats...
Ron
Ron
Team Owner
Joined: May 2006
Posts: 21,473
Likes: 356
From: Palmdale, Ca----- 2009 Cyber Gray 4LT A6 F55 452 RWHP 422 RWTQ- RIP 1998 C5 734 RWHP & 585 RWTQ-----
I have been running my KOOKS for two years now BOOSTED and no problems at all
Plenty of fuel keeping temps down and not going "LEAN" (Which really destroys the Caties)! So far so good
701 RWHP 582 RWTQ
Thanks,Matt
Plenty of fuel keeping temps down and not going "LEAN" (Which really destroys the Caties)! So far so good
701 RWHP 582 RWTQ
Thanks,Matt
Melting Slicks
Joined: Dec 2003
Posts: 3,315
Likes: 17
From: Near Jacksonville Fl.
I installed my Kooks headers and cats in 2003 ~ 35K and they are still working fine.
Now have a little more then 70K on the car, mostly street use but I still get into boost regularly.
Now have a little more then 70K on the car, mostly street use but I still get into boost regularly.
Burning Brakes
Joined: Jul 2004
Posts: 1,172
Likes: 71
From: MA
I thougt that running rich killed them? . Aren't the cats running hotter with a rich mixture because the catalyst has to burn the extra fuel? This, combined with the added exhaust heat when in WOT (my Jet Hot extreme coated headers have some coating damage from a dyno session) could cook them.
Last edited by 01vetter; Oct 2, 2009 at 07:48 PM.
Pro
Joined: Dec 2004
Posts: 600
Likes: 0
From: Sudbury Ontario
I thougt that running rich killed them? . Aren't the cats running hotter with a rich mixture because the catalyst has to burn the extra fuel? This, combined with the added exhaust heat when in WOT (my Jet Hot extreme coated headers have some coating damage from a dyno session) could cook them.
Pro
Joined: Jan 2009
Posts: 509
Likes: 0
From: Saskatoon
Has anyone every tried Borla Xr1s in place of their cats??
*can anyone see a sig under my post? I just made one, just up just fine in my User CP under preview but I physically cannot see a sig in any of my new posts??
*can anyone see a sig under my post? I just made one, just up just fine in my User CP under preview but I physically cannot see a sig in any of my new posts??
Last edited by 95redz; Oct 3, 2009 at 12:20 PM.
Instructor
Joined: Aug 2008
Posts: 186
Likes: 0
From: London Ontario
Hi Bobby, my cats gave up this year on a dyno session. They were Dynotech, which in my opinion are great cats, i know that i was running a little rich due to safety for my stock bottom. After the mods we did this past spring( the car seemed slower on top end). We were on the dyno when we noticed metal flakes out of the exhaust. When we pulled them they were completly clogged. Fixed them and next dyno picked up 140 rwhp. I think with the Meth & the hi horse supercharge combination, only a matter of time.
Gus
Gus