Cat placement discussion
Thread Starter
Race Director
Joined: Feb 2003
Posts: 11,671
Likes: 20
From: Lake Wylie SC
Cat placement discussion
I had nothing to do the other night and I started thinking about where to put CATs on my EM header install project. Here is the question:
How far back can you put the cats on a 92-96 exhaust system and still be effective in their operation? Is there a magic formula?
Now, I know I can just put them on the end of the collector and be done with it, but I just want to know if they can be installed further back. Any exhaust gurus out there? Let the learning begin.....
How far back can you put the cats on a 92-96 exhaust system and still be effective in their operation? Is there a magic formula?
Now, I know I can just put them on the end of the collector and be done with it, but I just want to know if they can be installed further back. Any exhaust gurus out there? Let the learning begin.....
Large Impressive Member
Joined: Jul 2003
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From: Good health is merely the slowest possible rate at which one can die
St. Jude Donor '04-'05-'06-'07
Just curious Tom, since you have a six speed why you don't want to put them next to the tranny where there's plenty of room? And fredk, Stainless Works has a header and cat set-up for the automatics that allows cat placement next to the trans.
Elite Torch Red Member
Joined: Sep 1999
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From: Exit 89 GSP,Lakewood,NJ The Land Of Mojo
Cental/South NJ Events Coordinator
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St. Jude Donor '03-'04-'05-'06-'07
From what I've read, the government regulates the placement of teh cats and to putthem anywhere else other than the stock location is illegal.
I've never heard of anyone being busted for this and I know plenty of folks who have either removed them or placed themelsewhere and haven't had a problem, but I don't know how many live in a non emmissions checking state.
I've never heard of anyone being busted for this and I know plenty of folks who have either removed them or placed themelsewhere and haven't had a problem, but I don't know how many live in a non emmissions checking state.
Racer
Joined: Mar 2005
Posts: 399
Likes: 2
From: Newtown PA
The farther the cats are from the engine, the longer it takes for them to reach operating temperature and become effective. If the car is used primarily for the street and you care about emissions and our car hobby, the goal should be to place them as close as possible to the engine. IMO, street cars should be kept as "legal" as possible so that the anti-car ***** dont try to find an excuse to kill our hobby. Keep the cats (upgradge to high flow cats if necessary), and place them as close to the engine as possible.
