Gut the Cat?
Race Director
Joined: Sep 2005
Posts: 13,269
Likes: 0
From: Sharpsburg Georgia
GA Events Coordinator
Originally Posted by bogus
that's most odd. NOx is a result of heat, and cats do nothing to control NOx. That's what EGR is all about.
we have replaced a ton of them to bring nox under control, and no i am not advising any one to remove any mandated emm parts.
Safety Car
Joined: Oct 2002
Posts: 3,991
Likes: 0
From: Phoenix AZ
Each one effects the others in more ways that you can imagine. In school we spent 5 weeks alone just on fuel and emissions, and it still wasn't enough time. I have more questions now than before I took that class, its that complicated.
Team Owner
Joined: Sep 2001
Posts: 62,160
Likes: 1,733
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
Originally Posted by C4driver99
If you have the L98 it has two front converters and a reasonator. Remove the front two and run straight pipe and put a high free flow cat in place of the reasonator. There are test that show up to a 15 hp gain. Dont no if its 
but just passing it on 
but just passing it on You should see a minimum of about 10hp from gutting the main cat altogether. You'd be dumb not to put a pipe inside it though, because the drone is going to be bad.
You wont pass a sniffer test, without a special tune, if your cat is gutted.
Le Mans Master
Joined: Oct 2004
Posts: 7,706
Likes: 485
From: Everett WA
C4 of Year Finalist (appearance mods) 2019
Random Technologies manufacturers some small yet high flowing cats in SS however they're a bit expensive.
http://www.randomtechnology.com/
http://www.randomtechnology.com/
Last edited by Mr. Peabody; Feb 14, 2006 at 04:02 PM.
