Empty the Cats? Performance Cats anyone? - Hemi Truck Club
 
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Old 07-13-2015, 07:32 PM   #1
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Empty the Cats? Performance Cats anyone?

Ok guys, educate me. I had an O6 Camaro I did this once with. It just made more cool noises. Anyone do this yet? Like it? I'm in FL with no emissions testing -fyi

Go!

Why would I do this again...Nothing else to do this weekend till my lowering kit gets here.

I got "the bug"

Thanks!

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Old 07-13-2015, 08:19 PM   #2
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Remove the Catt don't need it it's just heavy lol.been castles here since 2007 when I installed my headers on my eng with Y pipe.
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Old 07-14-2015, 08:52 AM   #3
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Was emissions exempt so had the cats removed when doing long tubes. Used non foulers w/ steel wool to take care of the rear sensors. That was 8 years ago until i sold her.
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Old 07-14-2015, 08:53 AM   #4
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Old 12-15-2015, 02:51 PM   #5
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Quote:
Originally Posted by TheSatinPumpkin View Post
Was emissions exempt so had the cats removed when doing long tubes. Used non foulers w/ steel wool to take care of the rear sensors. That was 8 years ago until i sold her.
Hi more info pls ("non foulers w/ steel wool")
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Old 12-15-2015, 03:04 PM   #6
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Originally Posted by Joggie View Post
Hi more info pls ("non foulers w/ steel wool")
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Old 12-15-2015, 04:22 PM   #7
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Quote:
Originally Posted by Joggie View Post
Hi more info pls ("non foulers w/ steel wool")
If you search the forum there should be plenty of information. I know I've posted several times on the subject over the years. The non-fouler isolate the senor from the exhaust gas keeping it's count lower than the front O2s. You will need two non-fouler's per sensor. One you will drill out so that the O2s will screw in fully. This non-fouler is then screwed into the non-fouler screwed into the O2s bung on the exhaust pipe. What you end up with is the two non-foulers stacked together with the O2s screwed into the top. This isolates the O2s. Adding steel wool helps isolate the O2s even more. Welding up the first non-fouler's hole totally isolates the O2s. The whole assembly is really just a safe place to hold the O2s, keeping it away from the exhaust gases. You can effectively do the same thing by wraping the O2s in tin foil and wire tieing it out of the way with a plug screwed into the bung.
http://www.summitracing.com/parts/RNB-42009/
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Old 02-07-2016, 08:40 AM   #8
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Gutting cats is pretty bad for performance. Going from the tight exhaust into a big open hollow chamber where the catalytic material used to be cools, expands, and slows the exhaust gasses, which hurts scavenging and exhaust flow. You're better off just replacing them with straight pipe.
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Old 02-07-2016, 09:41 AM   #9
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I agree, if you need a cat I would recommend the original 03 Ram hemi cat. It was designed as a single cat and is large a free flowing. Using two of these is the best setup I know of.




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Old 06-22-2016, 10:49 AM   #10
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If you just gotta' have cats: another option is the Vibrant GESi UHO cat which is supposedly EPA Certified with a EPA number engraved on the case and said not to affect performance at all .

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