Hollowed out Cats

Eminembdg · May 17th, 2007, 06:50 PM

I've searched and couldn't seem to find an answer to my question. If I hollowed out my cats would I feel a gain in HP? I have a stock exhaust and I don't care about passing emissions since I live in PA and I can easily get stickers for my car.

Eminembdg · May 19th, 2007, 10:27 AM

bump

markush · May 21st, 2007, 02:34 PM

I'm just tossing in 2 cents but I highly doubt you will "feel" anything.

Eminembdg · May 23rd, 2007, 02:59 PM

ok, that's what i figured. i'm just trying to get everything out of it that i can untill i actually can afford to do an exhaust system.

monk36 · May 29th, 2007, 08:14 PM

I doubt you will see much if any gains at all. It will get louder, but the chamber is so much bigger than the pipe sizing, it wouldnt work like you think.

The air will hit the empty cat, expand, then have to force itself back into a smaller pipe, whereas a regular cat will guide the air as it moves through.

patwrecked · May 29th, 2007, 10:49 PM

if anything you will gain some low end torque (if any) due to the increased backpressure.

tlr96 · May 30th, 2007, 09:15 PM

you prob would lose some throttle response, would'nt gain power, and it'd most likely sound like crap. just save up for an o/r mid-pipe and/or get a cat-back if you dont already have one, you'll be much happier. just my .02

Eminembdg · May 31st, 2007, 10:10 PM

thanks for all your help guys

May 17th, 2007, 06:50 PM	#1
Eminembdg Regular Join Date: Apr 2007 Posts: 92	Hollowed out Cats I've searched and couldn't seem to find an answer to my question. If I hollowed out my cats would I feel a gain in HP? I have a stock exhaust and I don't care about passing emissions since I live in PA and I can easily get stickers for my car. __________________ 2002 Mustang GT. 18" Shelby Torque Thrusts w/Mach 1 lip, Cobra Front End, Short Throw, K&N filter. Nothing impressive as of yet, but I'm working on it.

May 19th, 2007, 10:27 AM	#2
Eminembdg Regular Join Date: Apr 2007 Posts: 92	bump __________________ 2002 Mustang GT. 18" Shelby Torque Thrusts w/Mach 1 lip, Cobra Front End, Short Throw, K&N filter. Nothing impressive as of yet, but I'm working on it.

May 23rd, 2007, 02:59 PM	#4
Eminembdg Regular Join Date: Apr 2007 Posts: 92	ok, that's what i figured. i'm just trying to get everything out of it that i can untill i actually can afford to do an exhaust system. __________________ 2002 Mustang GT. 18" Shelby Torque Thrusts w/Mach 1 lip, Cobra Front End, Short Throw, K&N filter. Nothing impressive as of yet, but I'm working on it.

May 29th, 2007, 08:14 PM	#5
monk36 Newbie Join Date: Jul 2006 Location: Tyler. Texas Posts: 7	I doubt you will see much if any gains at all. It will get louder, but the chamber is so much bigger than the pipe sizing, it wouldnt work like you think. The air will hit the empty cat, expand, then have to force itself back into a smaller pipe, whereas a regular cat will guide the air as it moves through. __________________ 02 procharged 300whp V6 - sold ___________________________ 05 GT - corsa axleback

May 30th, 2007, 09:15 PM	#7
tlr96 Hardcore Enthusiast 1996 Mustang GT Join Date: Mar 2007 Location: Effingham, IL Posts: 1,793	you prob would lose some throttle response, would'nt gain power, and it'd most likely sound like crap. just save up for an o/r mid-pipe and/or get a cat-back if you dont already have one, you'll be much happier. just my .02 __________________ view my garage for pics and modifications listen to my exhaust video 1 video 2 video 3

May 21st, 2007, 02:34 PM	#3
markush Regular Join Date: Dec 2006 Posts: 60	I'm just tossing in 2 cents but I highly doubt you will "feel" anything.

May 29th, 2007, 10:49 PM	#6
patwrecked Regular Join Date: Feb 2007 Posts: 328	if anything you will gain some low end torque (if any) due to the increased backpressure.

May 31st, 2007, 10:10 PM	#8
Eminembdg Regular Join Date: Apr 2007 Posts: 92	thanks for all your help guys __________________ 2002 Mustang GT. 18" Shelby Torque Thrusts w/Mach 1 lip, Cobra Front End, Short Throw, K&N filter. Nothing impressive as of yet, but I'm working on it.

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