Should I go catless on a pd blower car?
Thread Starter
Launching!
Joined: Feb 2012
Posts: 263
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From: IL, USA
Should I go catless on a pd blower car? I was told that going catless would be the way to go for a car with a PD Blower, is this true? I make a little over 1000hp at 18 psi with my 2650 and currently have ARH headers, high flow cats, exhaust and Borla cat back...
I noticed the cats do get alot more hotter than the rest too...
I noticed the cats do get alot more hotter than the rest too...
I don't know what the chances are but the reality of it is that a failing or failed cat can damage a high horsepower engine. So a simple failure can turn into a lot worse.
My opinion, once you get over around 600 wheel it might be best to go catless.
I can honestly say I've never heard of anyone with custom built stuff running cats on 1k wheel horsepower.
My opinion, once you get over around 600 wheel it might be best to go catless.
I can honestly say I've never heard of anyone with custom built stuff running cats on 1k wheel horsepower.
TECH Addict
Joined: Oct 2016
Posts: 2,513
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From: PDX-OR-USA
I don't know what the chances are but the reality of it is that a failing or failed cat can damage a high horsepower engine. So a simple failure can turn into a lot worse.
My opinion, once you get over around 600 wheel it might be best to go catless.
I can honestly say I've never heard of anyone with custom built stuff running cats on 1k wheel horsepower.
My opinion, once you get over around 600 wheel it might be best to go catless.
I can honestly say I've never heard of anyone with custom built stuff running cats on 1k wheel horsepower.
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Verdad Gallardo I've never run cats on a boosted car so my comments are 3rd party, I hear cats don't like heat, fuel, and being on the 2 step. Causes melty lol.
OP could add cutouts too.
OP could add cutouts too.
If you don't absolutely have to have them, why take a chance? Add to that the fact that they are not cheap for a set that has a chance to live at those power levels. If they are doing what cats are supposed to do, I bet they offer a fair bit of restriction too.
Whatever restriction you have on the backside is going to create more boost and intake air heat on the front side.
Whatever restriction you have on the backside is going to create more boost and intake air heat on the front side.
Last edited by old motorhead; Jan 24, 2024 at 01:54 PM.
Joined: Mar 2007
Posts: 1,149
Likes: 62
From: Saskatchewan, Canada - where arguing "DA" is for the slow and weak...
But, factory take-off cats are available from people who remove them for noise or ignorance purposes.
TECH Resident
Joined: Jun 2013
Posts: 814
Likes: 231
From: Nebraska, The Good Life
When I last had my TVS2300 blown GTO on the dyno, it made slightly more horsepower with the headers connected to the exhaust (with high flow cats) than it did with open headers.
Here are some check hi flow cats in 3".... $109 each 200 cell no mention of flow rating.
https://privatelabelmfg.com/products...42275512549514
I run my turbo LS9 RX-7 on e85 no cats.... and it isn't too stinky... but cars on unleaded smell so bad to me without cats. On my LS7 RX-7 I run dual high flow Random Technology cats and it still does 111mph 1/8 and 138mph 1/4 on the motor thru them.
https://privatelabelmfg.com/products...42275512549514
I run my turbo LS9 RX-7 on e85 no cats.... and it isn't too stinky... but cars on unleaded smell so bad to me without cats. On my LS7 RX-7 I run dual high flow Random Technology cats and it still does 111mph 1/8 and 138mph 1/4 on the motor thru them.
Last edited by gnx7; Jan 28, 2024 at 06:13 PM.