Removing the cat.?
09-07-2004
#31
Super Member
iTrader: (1)
Join Date: Aug 2004
Location: LA
Posts: 528
Likes: 0
Received 0 Likes
on
0 Posts
Rep Power: 0 
umm.. our cars are meant for K20 swaps to downshift upon and eat stock GT's and most Beamers.. not economy.. ppl come here to talk about MODIFICATION of thier 7th gens.. otherwise most ppl wouldnt bother to post.. u want point A to point B car??? get a hyundai or a peice of crap scooter... lets all post REALISTICLY and talk about how much fuel my civic saved today..YEA LETS LETS!!!!!!!
09-08-2004
#32
Registered!!
iTrader: (7)
Join Date: May 2004
Location: Kanada
Posts: 3,435
Likes: 0
Received 0 Likes
on
0 Posts
Rep Power: 277
Originally Posted by xproductionz
i know our cars are economy cars.. but hey.. we got people out there that want to up the ante a little and yet get turned down... i mean.. if someone wants to do womething to there car and it only adds 2hp....let them do it.. but lets say they do 5 things to the car that yields 2 hp a piece.. the that ups the ante at least 10 hp... this is just an example so i dont wanna be flamed for it... but i just gotta say lighten up a little... isnt that we are all here for.,.. to help each other out and not shut everyone down
09-08-2004
#33
Prowlin' with a Purpose
iTrader: (16)
Join Date: Nov 2002
Location: Minnesota
Age: 41
Posts: 5,239
Likes: 0
Received 0 Likes
on
0 Posts
Rep Power: 314 most places i know stick in a smog sniffer in the tail pipe, not plug anything into the obd2 port.. for those of you who have an o2 sim, you will fail the smog tests, unless you got a high flow cat
but i cant speak for everyone, since i dont have a cat
but i cant speak for everyone, since i dont have a cat
09-08-2004
#34
Banned
Join Date: Mar 2004
Location: Louisiana
Age: 40
Posts: 104
Likes: 0
Received 0 Likes
on
0 Posts
Rep Power: 0 when i swapped my b16 into me 6th gen i had no cat and 3 inch piping on it for about a week and i saved up and bought a highflow cat 150 fu*kin bucks and it felt like i lost 15 whp it was a significant loss in power... .. it was too loud though wayyy too loud im about to take the cat off again i miss that big power rush at vtec
09-08-2004
#36
Banned
Join Date: Mar 2004
Location: Louisiana
Age: 40
Posts: 104
Likes: 0
Received 0 Likes
on
0 Posts
Rep Power: 0 yes catless was a total diff when hittin vtec when i didnt have a cat vtec would slam me back in my racing seats.. b ut now its just a lil boost with the cat on it .... no it was totally louder without it im sayin that the highflow cat was a waste of my money ... just kept me from gettin tickets
09-09-2004
#40
Search and Learn
iTrader: (34)
Join Date: May 2002
Location: 909, Socal
Posts: 14,004
Likes: 0
Received 0 Likes
on
0 Posts
Rep Power: 407 Gained alot more power with DC Race header for me.
No Cat.
Highflow cat tends to make exhaust sound really loud.
My exhaust sounds like stock.
Running Dc Race header, rsx type s midpipe, stock muffler.
I would probably guess because of restricted stock type s midpipe, car isn't loud as aftermarket catbacks. even without Cat convertor.
No Cat.
Highflow cat tends to make exhaust sound really loud.
My exhaust sounds like stock.
Running Dc Race header, rsx type s midpipe, stock muffler.
I would probably guess because of restricted stock type s midpipe, car isn't loud as aftermarket catbacks. even without Cat convertor.
09-10-2004
#42
Why is my vagina bleeding?
iTrader: (1)
Join Date: Mar 2004
Location: Montreal
Age: 44
Posts: 3,582
Likes: 0
Received 0 Likes
on
0 Posts
Rep Power: 280 Our cars handle great and are built exceptionally well in comparison to competitors even they are underpowered. And definitely look the best. I didn't like the si shape before, but its grown on me, and with an oem body kit it looks bitching.
09-12-2004
#43
Redline Adrenaline VP
iTrader: (1)
Join Date: Nov 2003
Location: Bossier City,LA
Age: 38
Posts: 859
Likes: 0
Received 0 Likes
on
0 Posts
Rep Power: 258
Originally Posted by ctx66
im pretty sure youll lose torque if you remove the cat.. so i wouldnt do it. it wouldnt cause any harm to the engine though
I'm pretty sure you don't know what you are talking about.
I got my megan hi flow resonator put on friday.
I've raced an manual 2003 tiburon (4cyl) and I beat it by a car last night.
My car feels much faster.I feel like a got atleast 5hp.
Better response and i can feel the vtec kick in.
No smoke ...but it's a bit louder.
I have an automatic btw.
I say get one.
Please listen to jttegx, he knows what he's talking about.
Last edited by JX6; 09-12-2004 at 12:05 PM.
09-12-2004
#44
Registered!!
iTrader: (-1)
Join Date: Mar 2004
Location: Zanesville, Ohio
Posts: 139
Likes: 0
Received 0 Likes
on
0 Posts
Rep Power: 0
Originally Posted by 7gencivicboi
quick question,
right now I have a DC Header, OBX Hi-flow cat, and DC Sport TCS. with this on I wont pass emission right??? so if I replace it with random or stock cat, I will pass emission??? let me know
right now I have a DC Header, OBX Hi-flow cat, and DC Sport TCS. with this on I wont pass emission right??? so if I replace it with random or stock cat, I will pass emission??? let me know
How much louder did that hi-flow cat make your exhaust. I just have that catback on now and don't want to make it too much louder.
09-13-2004
#45
Registered!!
iTrader: (8)
Join Date: Feb 2003
Location: familycar's Moms Room
Posts: 1,555
Likes: 0
Received 0 Likes
on
0 Posts
Rep Power: 275 
Originally Posted by xproductionz
i was wondering.... if the o2 simulator is in thhere which turns off the CEL... then does that mean it would be able to pass emission check... cause all they do is plug into the ODB2 connector which reads the 02 sensor... but if u have the simulator then it should be fine.. wouldnt it??
Even the guy at the smog place told me that our civics without cats have less emissions than mustangs with cats, ULEV helps alot! As long as your ecu isnt throwing any codes youll be fine.
09-13-2004
#46
Registered!!
Join Date: Nov 2001
Location: Western Massachusetts, US
Posts: 706
Likes: 0
Received 0 Likes
on
0 Posts
Rep Power: 0 Some of the people on this site have hi-flow cats and test pipes with stock mufflers, what the point of it all if the exhaust ends up coming out of a 1" hole?
09-14-2004
#47
Redline Adrenaline VP
iTrader: (1)
Join Date: Nov 2003
Location: Bossier City,LA
Age: 38
Posts: 859
Likes: 0
Received 0 Likes
on
0 Posts
Rep Power: 258
Originally Posted by DIZZLE
Alot of false info on this thread. There are plenty of members who have passed, including myself, with no cat and a 02 sim.
Even the guy at the smog place told me that our civics without cats have less emissions than mustangs with cats, ULEV helps alot! As long as your ecu isnt throwing any codes youll be fine.
Even the guy at the smog place told me that our civics without cats have less emissions than mustangs with cats, ULEV helps alot! As long as your ecu isnt throwing any codes youll be fine.
So you won't pass if you have a CEL?
09-15-2004
#48
Search and Learn
iTrader: (34)
Join Date: May 2002
Location: 909, Socal
Posts: 14,004
Likes: 0
Received 0 Likes
on
0 Posts
Rep Power: 407
Originally Posted by JX6
So you won't pass if you have a CEL?
At Emissions, All they do is plug obd2 scan tool to see if there's any problem.
Nothing will come up as long as you dont have CEL on.
And They will probably do visual testing for cat convertor...
09-16-2004
#49
Registered!!
Join Date: Aug 2003
Posts: 935
Likes: 0
Received 0 Likes
on
0 Posts
Rep Power: 261
Originally Posted by JX6
I'm pretty sure you don't know what you are talking about.
I got my megan hi flow resonator put on friday.
I've raced an manual 2003 tiburon (4cyl) and I beat it by a car last night.
My car feels much faster.I feel like a got atleast 5hp.
Better response and i can feel the vtec kick in.
No smoke ...but it's a bit louder.
I have an automatic btw.
I say get one.
Please listen to jttegx, he knows what he's talking about.
I got my megan hi flow resonator put on friday.
I've raced an manual 2003 tiburon (4cyl) and I beat it by a car last night.
My car feels much faster.I feel like a got atleast 5hp.
Better response and i can feel the vtec kick in.
No smoke ...but it's a bit louder.
I have an automatic btw.
I say get one.
Please listen to jttegx, he knows what he's talking about.
09-16-2004
#50
Registered!!
Join Date: Jul 2004
Location: Venezuela
Age: 40
Posts: 159
Likes: 0
Received 0 Likes
on
0 Posts
Rep Power: 0 1) unleaded fuel fumes are higly toxic unless catalyzed...
2) back presure is both a good and bad thing... ppl are still figthing about that... only thing thats clear is that both too little and too much hurt the engine... (too little and the eng will start detonating..)
3) u can hit the cat with a hammer untill you break it on the inside (the insides not the cat) and ull get a bit more flow... but since the cat is bigger than the pipe it will create free flow until the middle of the cat and a bottle neck at the end of it.. since the cristals inside will be broken there wont be anything to stop the flow.. or better yet get a racing cat hehe
2) back presure is both a good and bad thing... ppl are still figthing about that... only thing thats clear is that both too little and too much hurt the engine... (too little and the eng will start detonating..)
3) u can hit the cat with a hammer untill you break it on the inside (the insides not the cat) and ull get a bit more flow... but since the cat is bigger than the pipe it will create free flow until the middle of the cat and a bottle neck at the end of it.. since the cristals inside will be broken there wont be anything to stop the flow.. or better yet get a racing cat hehe
09-16-2004
#51
Registered!!
iTrader: (2)
Join Date: Aug 2004
Location: Rhode Island
Age: 49
Posts: 265
Likes: 0
Received 0 Likes
on
0 Posts
Rep Power: 0 
I eliminated the cats on a 5 liter mustang and it was a noticible loss in the low end. If you try it and don't like the results you could always change it back.
09-21-2004
#52
Redline Adrenaline VP
iTrader: (1)
Join Date: Nov 2003
Location: Bossier City,LA
Age: 38
Posts: 859
Likes: 0
Received 0 Likes
on
0 Posts
Rep Power: 258
Originally Posted by ctx66
yea, ok. whatever you wanna think buddy. not even gonna argue with you since your obviously a damn moron.
I haven't lost any torque because civs don't have any in the first place.
If you don't have the hi-flow cat yourself you don't know WTF you are talking about.Don't hate on me because your car is slower than mine.
Last edited by JX6; 09-21-2004 at 08:23 AM.
09-23-2004
#53
Registered!!
Join Date: Aug 2003
Posts: 935
Likes: 0
Received 0 Likes
on
0 Posts
Rep Power: 261 get a clue. im not "hating" on anything, im being realistic. take the high flow cat off, dyno the car, put it back on, dyno again. tell me about the amazing results you get. and also im not dumb enough to buy a civic thinking its a fast car, or can be made fast. if i wanted a fast car i wouldve got the 92 3kgt vr4 i was looking at, but i chose reliability and mpg over power. so yea, my car is slow. slower than yours? i bet im a better driver than you so id still be able to beat you even with your killer high flow cat
09-23-2004
#54
Redline Adrenaline VP
iTrader: (1)
Join Date: Nov 2003
Location: Bossier City,LA
Age: 38
Posts: 859
Likes: 0
Received 0 Likes
on
0 Posts
Rep Power: 258 You have a manual?
If you do I wouldn't expect to win LOL....even
though I have beaten manual 7th gens (DX and 3 EX's)
I am well aware of the fact that I have a 4cyl
and not a V6 or V8.
It has gotten a bit faster.I doesn't matter how much, but
"I" can feel it.....that's whats important.I know my car well and how slow it is.
If you do I wouldn't expect to win LOL....even
though I have beaten manual 7th gens (DX and 3 EX's)
I am well aware of the fact that I have a 4cyl
and not a V6 or V8.
It has gotten a bit faster.I doesn't matter how much, but
"I" can feel it.....that's whats important.I know my car well and how slow it is.
09-23-2004
#55
Balut Eating Champ
iTrader: (29)
Join Date: Dec 2003
Location: Las Vegas, NV
Age: 43
Posts: 3,568
Likes: 0
Received 0 Likes
on
0 Posts
Rep Power: 0
Originally Posted by Looney_01Civic
You guys are a bunch of idiots!!! If you take your cat off you are going to lose your bottom end power!! We are talking about a 1.7l 4 cyl. here!! They need back pressure!!! And to top it all off, removing the cat isnt going to give you any horsepower at all!!! You will lose HP!!! If you want to drive a fast car, then your first step is to sell your all show no go Honda!!!!!
I got the high flow cat right now and i'm thinkin about the straight through piping... I think I'm gonna get it done by next week I'll tell you guys the result... 
09-23-2004
#56
Redline Adrenaline VP
iTrader: (1)
Join Date: Nov 2003
Location: Bossier City,LA
Age: 38
Posts: 859
Likes: 0
Received 0 Likes
on
0 Posts
Rep Power: 258
Originally Posted by pnoyster2k1cvic
so what if i'm turbo charged? that wouldn't apply right? coz I still have a kick on the tires on 3rd gear... hmmmm I got the high flow cat right now and i'm thinkin about the straight through piping... I think I'm gonna get it done by next week I'll tell you guys the result...
I got the high flow cat right now and i'm thinkin about the straight through piping... I think I'm gonna get it done by next week I'll tell you guys the result... Keep us posted.
BTW:
I got a catback with 2.25" piping put on my car with the megan hi-flow resonator (it's not a cat) and my car went in limp mode. I reset the ECU and my car is fine.It's a bit quicker.....
03-29-2007
#57
Registered!!
iTrader: (2)
Join Date: Apr 2004
Location: AL
Age: 43
Posts: 40
Likes: 0
Received 0 Likes
on
0 Posts
Rep Power: 0 Re: Removing the cat.?
i have the megan header and test pipe replacing the cat. cel light is on. if i reset the ecu, the light goes away for 30-50 miles but comes back on eventually - while the light is OFF, the car idles crazy as hell. when the light is ON, everything is fine.
i'm not complaining, just commenting. i've read about how the bungs are not properly heat treated and how you'll burn up your sensors. i've haven't decided on an exhaust yet, but for now i'm content with the cel just being ON.
2k1 5spd ex w/ 90k miles
i'm not complaining, just commenting. i've read about how the bungs are not properly heat treated and how you'll burn up your sensors. i've haven't decided on an exhaust yet, but for now i'm content with the cel just being ON.
2k1 5spd ex w/ 90k miles
Thread
Thread Starter
Honda Civic Forum
Replies
Last Post
Greenmonster
Mechanical Problems/Vehicle Issues and Fix-it Forum
3
08-21-2015 07:40 PM
adamdrives
Mechanical Problems/Vehicle Issues and Fix-it Forum
15
08-08-2015 08:53 PM
Green02civic
Mechanical Problems/Vehicle Issues and Fix-it Forum
13
07-27-2015 10:48 PM
