Is not having a cat. converter good or not?
02-04-2004, 04:58 PM
#1
Trial User
Thread Starter
Join Date: Feb 2004
Location: Po0rmona, Ca
Posts: 1,865
Likes: 0
Received 0 Likes
on
0 Posts
Is not having a cat. converter good or not?
My set up is B20vtec. with jdm headers, ctr cams, AEM cai, and chipped computer so am I gaining power or losing with not having a cat?
02-04-2004, 05:00 PM
#2
Join Date: Nov 2003
Location: NY
Posts: 1,049
Likes: 0
Received 0 Likes
on
0 Posts
Re: Is not having a cat. converter good or not? (racer_x_eg)
if the cat isnt high flow you are restricting your motor .. im guessing the jdm headers have a 2.5 inch collectoer... get a high flow cat or just gut your cat... its good for power but bad for the enviorment... but o well your car will 
be faster...
EDIT: gutting the cat will def give you hard time passing emissions
be faster... EDIT: gutting the cat will def give you hard time passing emissions
02-04-2004, 05:01 PM
#3
Join Date: Oct 2003
Location: SouthBay/SoCal
Posts: 538
Likes: 0
Received 0 Likes
on
0 Posts
Re: Is not having a cat. converter good or not? (racer_x_eg)
You may loose a little torque but will gain some back on your top end. When I was running a test pipe the engine seemed to rev quicker too wich is another small advantage.
02-04-2004, 05:06 PM
#6
Join Date: Mar 2003
Location: Tallahassee, Fla, United states of America
Posts: 1,656
Likes: 0
Received 0 Likes
on
0 Posts
Re: (civic_rice)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by civic_rice »</TD></TR><TR><TD CLASS="quote">no cat & no res here
in place I have a glasspack.
city of 80,000 people
no emmisions laws here to pass
</TD></TR></TABLE>
Glass pack resonators own....
in place I have a glasspack.
city of 80,000 people
no emmisions laws here to pass
</TD></TR></TABLE>Glass pack resonators own....
Trending Topics
02-04-2004, 05:07 PM
#8
Honda-Tech Member
Join Date: Jan 2002
Location: Raleigh, NC
Posts: 15,334
Likes: 0
Received 0 Likes
on
0 Posts
Re: (RedLine_Performance)
Not having one makes your car louder and it's bad for the environment. It also makes your car stink and puts soot all over the back of it. Not worth it to me. I need a cat.
02-04-2004, 05:08 PM
#9
Join Date: Mar 2003
Location: Tallahassee, Fla, United states of America
Posts: 1,656
Likes: 0
Received 0 Likes
on
0 Posts
Re: (Ricey McRicerton)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Ricey McRicerton »</TD></TR><TR><TD CLASS="quote">Not having one makes your car louder and it's bad for the environment. It also makes your car stink and puts soot all over the back of it. Not worth it to me. I need a cat. </TD></TR></TABLE>
1. My car is no louder with the cat removed
2. My car dosen't stink
3. My car has no soot on the back bumper
4. My car has no cat...lol
1. My car is no louder with the cat removed
2. My car dosen't stink
3. My car has no soot on the back bumper
4. My car has no cat...lol
02-04-2004, 05:09 PM
#10
Honda-Tech Member
Join Date: Jan 2002
Location: Raleigh, NC
Posts: 15,334
Likes: 0
Received 0 Likes
on
0 Posts
Re: (infinatenexus)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by infinatenexus »</TD></TR><TR><TD CLASS="quote">
1. My car is no louder with the cat removed
2. My car dosen't stink
3. My car has no soot on the back bumper
4. My car has no cat...lol</TD></TR></TABLE>
1. Yes it is. It acts as a small resonator.
2. If you stand out behind the back of it I'd be willing to bet you would say differently
3. No cat has caused my car to have soot on the back of it.
4. Mine either.
1. My car is no louder with the cat removed
2. My car dosen't stink
3. My car has no soot on the back bumper
4. My car has no cat...lol</TD></TR></TABLE>
1. Yes it is. It acts as a small resonator.
2. If you stand out behind the back of it I'd be willing to bet you would say differently
3. No cat has caused my car to have soot on the back of it.
4. Mine either.
02-04-2004, 05:10 PM
#11
Honda-Tech Member
Join Date: Feb 2003
Location: Oregon
Posts: 3,219
Likes: 0
Received 0 Likes
on
0 Posts
Re: (infinatenexus)
Has anybody ever done a back to back comparison with a N/A car that is under 180whp? In my opinion the gains wouldn't be that much from a high flow cat to no cat in a N/A situation.
02-04-2004, 05:12 PM
#12
Join Date: Mar 2003
Location: Tallahassee, Fla, United states of America
Posts: 1,656
Likes: 0
Received 0 Likes
on
0 Posts
Re: (Ricey McRicerton)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Ricey McRicerton »</TD></TR><TR><TD CLASS="quote">
1. Yes it is. It acts as a small resonator.
2. If you stand out behind the back of it I'd be willing to bet you would say differently
3. No cat has caused my car to have soot on the back of it.
4. Mine either. </TD></TR></TABLE>
1. Mine got no louder when it was removed. It got adeeper tone.. but no louder
2. Nope... you can Pm Soccian.. he has stood behind my car
3. Maybe need to tune your car to compensate for the missing cat ?
1. Yes it is. It acts as a small resonator.
2. If you stand out behind the back of it I'd be willing to bet you would say differently
3. No cat has caused my car to have soot on the back of it.
4. Mine either.
</TD></TR></TABLE>1. Mine got no louder when it was removed. It got adeeper tone.. but no louder
2. Nope... you can Pm Soccian.. he has stood behind my car
3. Maybe need to tune your car to compensate for the missing cat ?
02-04-2004, 05:12 PM
#13
Honda-Tech Member
Join Date: Jan 2002
Location: Raleigh, NC
Posts: 15,334
Likes: 0
Received 0 Likes
on
0 Posts
Re: (5thgencivic)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 5thgencivic »</TD></TR><TR><TD CLASS="quote">Has anybody ever done a back to back comparison with a N/A car that is under 180whp? In my opinion the gains wouldn't be that much from a high flow cat to no cat in a N/A situation.</TD></TR></TABLE>
By my guesses, I would'nt say more than 5whp between the three, which is damn near negligble unless you are running side by side. I haven't heard one good thing firsthand about high flow cats (heard damn near all of them crap out within a year).
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by infinatenexus »</TD></TR><TR><TD CLASS="quote">
1. Mine got no louder when it was removed. It got adeeper tone.. but no louder
2. Nope... you can Pm Soccian.. he has stood behind my car
3. Maybe need to tune your car to compensate for the missing cat ?</TD></TR></TABLE>
Who knows then? I damn sure won't be one to argue with you about your firsthand experiences.
1. It may not seem quieter from inside, but think about it. How would something that acts as a resonator not quiet it down at all.
2. Your guess is as good as mine is.
3. I have tried tuning on top of tuning. I tune with a WB02 and some OBD software so I can get my fuel trim correct. I sit at 14.7 at idle and 13.0 at WOT. That's as close to the 13.6 that is "supossidly max power" from a FI motor as I could get the damned E-Manage (which is a whole other issue).
By my guesses, I would'nt say more than 5whp between the three, which is damn near negligble unless you are running side by side. I haven't heard one good thing firsthand about high flow cats (heard damn near all of them crap out within a year).
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by infinatenexus »</TD></TR><TR><TD CLASS="quote">
1. Mine got no louder when it was removed. It got adeeper tone.. but no louder
2. Nope... you can Pm Soccian.. he has stood behind my car
3. Maybe need to tune your car to compensate for the missing cat ?</TD></TR></TABLE>
Who knows then? I damn sure won't be one to argue with you about your firsthand experiences.
1. It may not seem quieter from inside, but think about it. How would something that acts as a resonator not quiet it down at all.
2. Your guess is as good as mine is.
3. I have tried tuning on top of tuning. I tune with a WB02 and some OBD software so I can get my fuel trim correct. I sit at 14.7 at idle and 13.0 at WOT. That's as close to the 13.6 that is "supossidly max power" from a FI motor as I could get the damned E-Manage (which is a whole other issue).
02-04-2004, 05:13 PM
#14
Join Date: Mar 2003
Location: Tallahassee, Fla, United states of America
Posts: 1,656
Likes: 0
Received 0 Likes
on
0 Posts
Re: (5thgencivic)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 5thgencivic »</TD></TR><TR><TD CLASS="quote">Has anybody ever done a back to back comparison with a N/A car that is under 180whp? In my opinion the gains wouldn't be that much from a high flow cat to no cat in a N/A situation.</TD></TR></TABLE>
well my butt dyno liked having no cat...
well my butt dyno liked having no cat...
02-04-2004, 05:13 PM
#15
Honda-Tech Member
Join Date: Feb 2003
Location: Oregon
Posts: 3,219
Likes: 0
Received 0 Likes
on
0 Posts
Re: (infinatenexus)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by infinatenexus »</TD></TR><TR><TD CLASS="quote">
1. Mine got no louder when it was removed. It got adeeper tone.. but no louder
2. Nope... you can Pm Soccian.. he has stood behind my car
3. Maybe need to tune your car to compensate for the missing cat ?</TD></TR></TABLE>
deeper can mean louder
1. Mine got no louder when it was removed. It got adeeper tone.. but no louder
2. Nope... you can Pm Soccian.. he has stood behind my car
3. Maybe need to tune your car to compensate for the missing cat ?</TD></TR></TABLE>
deeper can mean louder
02-04-2004, 05:17 PM
#16
Re: Is not having a cat. converter good or not? (ekb18cCivic)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ekb18cCivic »</TD></TR><TR><TD CLASS="quote">if the cat isnt high flow you are restricting your motor .. im guessing the jdm headers have a 2.5 inch collectoer... get a high flow cat or just gut your cat... its good for power but bad for the enviorment... but o well your car will be faster...
EDIT: gutting the cat will def give you hard time passing emissions</TD></TR></TABLE>
gutting your cat will do ****, maybe even make you loose power. gutting your cat causes unwanted turbulance; small pipe ---> large gutted hollow cat. section ---> small pipe. so if you tell me that you're gonna make power with that, then please school me. the reason why you make power with race cats and test pipes are because they're the same diameter piping and allows air to flow more smoothly.
be faster... EDIT: gutting the cat will def give you hard time passing emissions</TD></TR></TABLE>
gutting your cat will do ****, maybe even make you loose power. gutting your cat causes unwanted turbulance; small pipe ---> large gutted hollow cat. section ---> small pipe. so if you tell me that you're gonna make power with that, then please school me. the reason why you make power with race cats and test pipes are because they're the same diameter piping and allows air to flow more smoothly.
02-04-2004, 05:17 PM
#17
Join Date: Mar 2003
Location: Tallahassee, Fla, United states of America
Posts: 1,656
Likes: 0
Received 0 Likes
on
0 Posts
Re: (5thgencivic)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 5thgencivic »</TD></TR><TR><TD CLASS="quote">
deeper can mean louder </TD></TR></TABLE>
naa it just got deeper.. it lost that wonderfull high pitched sound lots os SOHC Hondas have
deeper can mean louder
</TD></TR></TABLE>naa it just got deeper.. it lost that wonderfull high pitched sound lots os SOHC Hondas have
Thread
Thread Starter
Forum
Replies
Last Post
Audio28
Tech / Misc
6
11-16-2002 03:38 PM
