Hello Guest
« previous next »
Pages: 1 [2]   Go Down

how to bore a cat converter?

  • 29 Replies
  • 4572 Views

0 Members and 9 Guests are viewing this topic.

*

Offline explosivo

  • 3157
  • 0
  • Gender: Male
  • I'm in the northern part of that one state.
    • omghi2u Gen. Discussion Forums
Re: how to bore a cat converter?
« Reply #15 on: May 20, 2004, 04:01:10 PM »
Quote
:o :-/ ??? ::) Kids! Unless it's clogged or no longer cuts down on NOx or HC then leave well enough alone. It doesn't give you a seat of the pants feel or drastic fuel economy. If you ask me the energy exerted on "gutting" the cat could be used elsewhere to actually add performance. Anyone with a dyno sheet to prove me wrong post it.  :P
But I like to smell my unburnt fuel, dammit! >:(


;)
Logged
omghi2.us[/url]
"Its a ZUKI thing. Doing more with less than less with more." -- HotRod
*

Offline Bfunk

  • 406
  • 2
  • Gender: Male
Re: how to bore a cat converter?
« Reply #16 on: May 20, 2004, 06:59:27 PM »
I don't have dyno results, but there is alot of difference in my kick.  Maybe my cat is getting plugged, I don't know,but when I went back to straight pipe even my girlfriend could feel the difference in acceleration.
Brian
Logged
*

Offline jerryp58

  • 449
  • 0
  • Gender: Male
Re: how to bore a cat converter?
« Reply #17 on: May 20, 2004, 10:27:41 PM »
Quote
I don't have dyno results, but there is alot of difference in my kick.  Maybe my cat is getting plugged, I don't know,but when I went back to straight pipe even my girlfriend could feel the difference in acceleration.
Brian


FWIW, I had an old, old pancake style cat (probably clogged) pulled off my car (not the Tracker) and replaced it with a new hi-flow cat with the same result as yours.  The hi-flows probably flow as much exhaust as a straight pipe and you have better emissions.  The only downside is more $$$.
« Last Edit: May 20, 2004, 10:28:54 PM by jerryp58 »
Logged
Jerry
1990 Geo Tracker,  2-Door Hard Top
1.6L 8v, 4x4 Automatic, 0" lift
*

Offline Speedracer7c

  • 2210
  • 0
  • Gender: Male
  • Guess she ain't stock no more!
Re: how to bore a cat converter?
« Reply #18 on: May 20, 2004, 11:29:19 PM »
My cat was plugged. It was the only reason why I bought it. Its almost like the zuk is constipated when it has a plugged cat. No place for anything to go.
Logged
93 sammy 5 inch calmini lift 31" ltbs locked rear
*

Offline lil_Truck

  • 1148
  • 0
  • Gender: Male
  • Eric Gardner
Re: how to bore a cat converter?
« Reply #19 on: May 21, 2004, 09:32:06 AM »
Quote
:o :-/ ??? ::) Kids! Unless it's clogged or no longer cuts down on NOx or HC then leave well enough alone. It doesn't give you a seat of the pants feel or drastic fuel economy. If you ask me the energy exerted on "gutting" the cat could be used elsewhere to actually add performance. Anyone with a dyno sheet to prove me wrong post it.  :P



I agree.  Unless someone can show me hard prof of the great benifites, I'll keep the cat in place.





Now, has anyone tryed getting rid of their muffler and just running a pipe from the cat back???

One more hit from a rock or log and my muffler will be gone.  It's just in a bad place.  

I've thought of just replacing it with a straight pipe.  Don't know what it will sound like.  Don't want to be too ricie...
Logged
e-mail: liltruck|removethispart|@comcast.net
96 Tracker
6" Calimini Lift with custom Frame
32 MTR's Warn 8000i
Front/Rear ARB's Many New Mods soon.
*

Offline explosivo

  • 3157
  • 0
  • Gender: Male
  • I'm in the northern part of that one state.
    • omghi2u Gen. Discussion Forums
Re: how to bore a cat converter?
« Reply #20 on: May 21, 2004, 09:53:39 AM »
Quote
I agree.  Unless someone can show me hard prof of the great benifites, I'll keep the cat in place.

Now, has anyone tryed getting rid of their muffler and just running a pipe from the cat back???

One more hit from a rock or log and my muffler will be gone.  It's just in a bad place.  

I've thought of just replacing it with a straight pipe.  Don't know what it will sound like.  Don't want to be too ricie...

I had just the gutted cat with the muffler cut off for a while, and it wasn't too loud... It was loud enough to drown out the tire buzz, though... I think it'd sound fine... since if you've got some sort of hole or leak at the muffler, it wouldn't be too much louder than it is now, methinks...
Logged
omghi2.us[/url]
"Its a ZUKI thing. Doing more with less than less with more." -- HotRod
*

Offline dschwab9

  • 61
  • 0
  • Gender: Male
    • Zuwharrie.Com
Re: how to bore a cat converter?
« Reply #21 on: May 21, 2004, 12:04:43 PM »
You need to remember also that if your truck is OBD2 (96 and newer), it has a second O2 sensor that monitors the operation of the cat.  If you take the cat out or gut it, you will get a constant check engine light and be stuck in open loop, which will decrease your gas milage.
Logged
Derek Schwab
Where The Road Ends...Zuwharrie Begins!
http://www.zuwharrie.com
http://bbs.zuwharrie.com
*

95XL7

Re: how to bore a cat converter?
« Reply #22 on: May 21, 2004, 01:00:09 PM »
Mine sounded pretty good with just a straight through glass pack instead of the muffler but also had a tailpipe.
Sounds a little louder now with the Main cat gutted,but the front two keep it quiet still.
Having the 6 cylinder and dual  Pre-cats lets me get away without the check engine light from coming on because one sensor is before and one after the Pre-cats.There isn't one after the main cat.
I drove it many miles for 2 days then rechecked my computer and no codes had been set.
Logged
*

Offline jagular7

  • 1026
  • 0
  • Gender: Male
  • Jagular7
Re: how to bore a cat converter?
« Reply #23 on: May 21, 2004, 01:22:50 PM »
To give you a more throttle heavy sound, oil soak the insulation in that glass pack. Then run the glass pack as far away as possible from the end. The longer tailpipe will reduce the transdusing waves which creates the noise. Under throttle, that's pretty much just a flow-through pipe as there is so much air flow, the noise doesn't have time to resonate itself dead.

I strongly suggest that you keep a working cat underneath your truck. EPA has been known to setup rolling exhaust checks and it's a real heafty fine if you are caught.
Logged
Lenexa, KS
*

Offline explosivo

  • 3157
  • 0
  • Gender: Male
  • I'm in the northern part of that one state.
    • omghi2u Gen. Discussion Forums
Re: how to bore a cat converter?
« Reply #24 on: May 21, 2004, 02:27:44 PM »
Quote
I strongly suggest that you keep a working cat underneath your truck. EPA has been known to setup rolling exhaust checks and it's a real heafty fine if you are caught.

That's why gutted cats are the way to go... looks like a cat upon a visual check, but with a muffler, there's no way to poke a wire in to see if there's still core! :P
Logged
omghi2.us[/url]
"Its a ZUKI thing. Doing more with less than less with more." -- HotRod
*

Offline blacktrack

  • 7
  • 0
  • I love YaBB 1G - SP1!
Re: how to bore a cat converter?
« Reply #25 on: May 21, 2004, 02:42:08 PM »
I think my cats plugged, I can smell it.  It would be cheaper to put in a piece of straight pipe, but he check engine light is bright. I have a 97, I don't have a problem taking the light out, but will it really decrease my mileage. I  had a ford focus with a header and no cat, I bought a o2 cheater, so the light wouldn't come on.
Logged
*

Offline jagular7

  • 1026
  • 0
  • Gender: Male
  • Jagular7
Re: how to bore a cat converter?
« Reply #26 on: May 21, 2004, 03:09:49 PM »
Quote

That's why gutted cats are the way to go... looks like a cat upon a visual check, but with a muffler, there's no way to poke a wire in to see if there's still core! :P


I've only heard, but the, inspectors, will want to figure out why you vehicle is not passing. You may be required to bring it to an inspection station.
Logged
Lenexa, KS
*

Offline supazuk

  • 56
  • 0
  • Gender: Male
  • git 'er done!
Re: how to bore a cat converter?
« Reply #27 on: May 21, 2004, 07:52:27 PM »
Quote
if people didnt gut there cats then they wouldnt need a baby sitter. so far since i have owned the tracker i have had to smog it every year because it is at risk for failing..if people didnt gut there cats or remove other envormint helping things or drive pos cars on the road i wouldnt have to fork out 140$ a year
 if we didn't have emisions we wouldn't need a baby sitter!

Logged
shut up and wheel it.. sick of hearing oh my (fill in blank) stock can climb mountians yet the only off roading its seen is the curb their g/f ran over!
*

Offline Mike71

  • 1449
  • 0
  • Gender: Male
Re: how to bore a cat converter?
« Reply #28 on: May 22, 2004, 05:02:38 AM »
Quote

 if we didn't have emisions we wouldn't need a baby sitter!



if people didnt do things they knew were wrong we wouldnt need a baby sitter..if we didnt have emitions we would live like jappan ( very very poluted)

i am a die hard muscle head i hate all the new laws forbiding my medaling fun..but in the same respect i understand why the laws are the way they are and what they are doing to help...LA would be land fill in 30 years if it wassent for pollution control
Logged
623hp kb cobra sold! 100hp kick new DD :P
*

jookycola

Re: how to bore a cat converter?
« Reply #29 on: June 23, 2004, 06:33:36 AM »
well if i bore it out are there any tips anyone can give me?

like is the Suzuki Cat made up of a "paper" or "fiber" type of filtration or is it those kind that have 100's of little glass marbles in it?

and really i'm doing it to increase my fuel economy for my cross country trip.

all ready did a full tune up, this was going to be a bonus...that is if it actually impromes any economy, sounds like a few people say no.
Logged
Pages: 1 [2]   Go Up
« previous next »