Removed or gutted cat. converter?
10-07-2005, 08:47 PM
#1
Never had a clean run
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Removed or gutted cat. converter?
Has anyone removed their cat. converter or gutted it out? If so, how does it smell and sound? I searched and saw one thread where the guy said it was funny sounding like loose vibrating metal, but other than that there were no other reports on it.
10-07-2005, 08:50 PM
#2
Adventurist.
Well, I have an electric cutout... equivalent to running without a cat. Sound is very very loud and smells like rotten eggs. I wouldn't recommend it unless you are using it for track purposes or FI (I see you are running nitrous).
10-07-2005, 10:29 PM
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To start, they do make high flow cats for our cars both the 2.2 and 3.0 as well as the 3.2 s and non s models. They do give you gains of around 3-6 and on the 3.2s much more whp depending on the application and mods you have. The smell with a larger cat or highflow cat is almost non existant meaning that you wont notice anything but a little more noise. Having a test pipe is lowder than a highflow cat and yeilds more hp gains. I think that for the money, they are worth every penny. They can range from 50 dollars to 150 dollars and alot of the time you have to weld an O2 bung or bypass the sensor.
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10-10-2005, 08:37 AM
#10
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Originally Posted by spicyhands
intresting but do our cars give problems(codes) with a higher flowing cat/test pipe/str8 pipe when the 02 reads it
you need an O2 SIM.Casper Eletronics sells a PnP SIM.
02-01-2006, 06:51 PM
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Originally Posted by typeR
you sure?
here it is!!! https://www.casperselectronics.com/M...ory_Code=honda
02-01-2006, 07:19 PM
#13
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PPl I don't know why you think there is no high flow cat for CL, I installed one 2 month ago. Our stock cat is 17" long, I suggest, you buy any high flow cat with 2.25 inlet /outlet, I think it should be OBD1, weld couple of flanges, put you O2 sensor back, and enjoy. There is no problem with check engine light, if you did everything right.
02-01-2006, 07:22 PM
#14
Senior Moderator
Originally Posted by bens cl
here it is!!! https://www.casperselectronics.com/M...ory_Code=honda
[IMG]http://www.inlinefour.com/ompowtespip.html[/img]
02-02-2006, 10:01 AM
#16
I wouldn't gut the cat, I'd pay to have a custom test pipe made, that way you can put your cat back in when you sell your car. Price a cat for our cars, several hundred dollars. o2sim works great and I have not thrown one code yet. good luck although this is an old thread.
11-27-2007, 07:44 PM
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I need to bump this up to add my input, since I just gutted my cat yesterday, it was already half broken, so I just finished the job.
It is not loud as hell, I have a Greddy EVOII and it barely made my car louder, however I can hear a hollow metal sound in the low end, sounds better than rattling though.
As far as gains, I am not really sure how much it did, I felt a huge difference because my cat was totally clogged up. Maybe a couple horsepower.
The only real positive I can see about gutting your cat, over a test pipe is that you can pass the visual inspection, just in case that cop takes a peek under the car.
Oh yeah, and I believe the inlet of the cat is 2 inches, so with my XS headers and exhaust, I go from a 2.5" pipe to a 2" pipe to a 2.36" pipe, so I am thinking of either getting a 2.5" test pipe or high flow cat.
This is on an 03 CL-S
It is not loud as hell, I have a Greddy EVOII and it barely made my car louder, however I can hear a hollow metal sound in the low end, sounds better than rattling though.
As far as gains, I am not really sure how much it did, I felt a huge difference because my cat was totally clogged up. Maybe a couple horsepower.
The only real positive I can see about gutting your cat, over a test pipe is that you can pass the visual inspection, just in case that cop takes a peek under the car.
Oh yeah, and I believe the inlet of the cat is 2 inches, so with my XS headers and exhaust, I go from a 2.5" pipe to a 2" pipe to a 2.36" pipe, so I am thinking of either getting a 2.5" test pipe or high flow cat.
This is on an 03 CL-S
11-28-2007, 01:35 AM
#22
140,000 miles young
dude come on. The few people who run w/o a cat on the street are not doing diddly to affect pollution. I am all for environmental activism when it matters, but you have to see what really counts.
I will keep my cat in cause it won't do much for me to pull it - Cocoa (and a few other people) really benefits from it.
As long as 99% of cars on the road have cats I am satisfied. Should all professional car racing be forbidden? Cause they don't run cats.
My thought is if you really benefit from running without a cat (3.5 150 shot) then pull it, otherwise leave it in.
I will keep my cat in cause it won't do much for me to pull it - Cocoa (and a few other people) really benefits from it.
As long as 99% of cars on the road have cats I am satisfied. Should all professional car racing be forbidden? Cause they don't run cats.
My thought is if you really benefit from running without a cat (3.5 150 shot) then pull it, otherwise leave it in.
11-28-2007, 04:02 AM
#25
Yeah even the high flow cats have stock size inlets and outlets but the RT cat did help me out. Im running the 3.0 Accord cat its 13" long overall with the catalyst seperated into two honeycomb chunks.
A 2.5" magnaflow race cat (resonator straight pipe) would be pretty good for our situation but I woudl prefer to just get a high flow 2.5 cat since I was looking out of my schools macintosh building which is 9 stories tall and the smog over the city did not look pretty, people for some reason think its gone just because its not as bad as the 70's but its there people, and the more people that feel their contribution isn't affecting everyone the worse the problem gets.
With the RT cat my low end torque went up a tad so I would think fuel economy would as well from it runningmore efficiently.
A 2.5" magnaflow race cat (resonator straight pipe) would be pretty good for our situation but I woudl prefer to just get a high flow 2.5 cat since I was looking out of my schools macintosh building which is 9 stories tall and the smog over the city did not look pretty, people for some reason think its gone just because its not as bad as the 70's but its there people, and the more people that feel their contribution isn't affecting everyone the worse the problem gets.
With the RT cat my low end torque went up a tad so I would think fuel economy would as well from it runningmore efficiently.
11-28-2007, 01:14 PM
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Yeah, I just threw a code actually, but I don't think it even puts your car in limp mode, since I am pretty sure it's for the 2nd o2 sensor. I might do that o2 simulator mod to get rid of it.
Originally Posted by Allout
Are you throwing any codes?
03-07-2008, 03:22 AM
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Srehmat02, any update on this? Were you able to get rid of it? I think I have a flex pipe leak again, but don't know if it's that or my gutted cat.
03-07-2008, 07:38 AM
#30
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Originally Posted by rtatsutani
Srehmat02, any update on this? Were you able to get rid of it? I think I have a flex pipe leak again, but don't know if it's that or my gutted cat.
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