Eliminate the cat??? - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

Reply
 
 
 
Thread Tools Search this Thread
Old 02-22-2004, 04:04 AM   #11
Senior Member
Posts like a Northstar
Thread Starter
 
Join Date: Aug 2003
Location: Buffalo Grove, IL
Posts: 666
Thanks: 0
Thanked 0 Times in 0 Posts
Glasuan is on a distinguished road
Default

You are right about that, the Maxima stinks to high heaven, everytime I follow him, usually I lead though, faster car and all
Glasuan is offline   Reply With Quote
Old 02-22-2004, 04:31 AM   #12
Senior Member
Certified Car Nut
 
Join Date: Jun 2003
Posts: 15,928
Thanks: 0
Thanked 0 Times in 0 Posts
BonneMeMN is on a distinguished road
Default

I'm sorry, but some sort of cat is necessary IMO. If you're driving this car anywhere besides the strip, use one. It really does a lot, and the difference between a hi flow and a tube will only be apparent on cars that are race tuned, and are race cars.
BonneMeMN is offline   Reply With Quote
Old 02-22-2004, 01:12 PM   #13
Senior Member
True Car Nut
 
Join Date: May 2002
Location: Edmonton, AB Canada
Posts: 2,621
Thanks: 0
Thanked 0 Times in 0 Posts
DeathRat is on a distinguished road
Default

Quote:
Originally Posted by willwren
Bullet, you have to remember that he'* NA.....he needs the backpressure more than you and I do. We've already had an SE try this, and he lost so much low end, he was pissed at himself for not listening. He has a Cat again. Just a high-flow unit now.
I removed the CAT from my SE & installed a Glasspack instead. This alllowed me to gain low end torque & still keep enough back pressure too. Of course my 92 didn't have two Oxygen sensors though to worry about. An O2 substitute may work to trick the PCM in believing everything is okay back there though.....never tried it myself yet. You still have to put "something" in the CAT'* place though! A straight pipe will not do it. With my setup I noticed more power & a nice rumble sound from the factory Hi-Perf muffler too. Another, alternative is getting a Hi-Flow CAT like this: MagnaFlow Universal Catalytic Converter
DeathRat is offline   Reply With Quote
Old 02-22-2004, 03:26 PM   #14
Junior Member
 
Join Date: Jun 2002
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
2000SilverBullet is on a distinguished road
Default

Quote:
I removed the CAT from my SE & installed a Glasspack instead. This alllowed me to gain low end torque & still keep enough back pressure too. Of course my 92 didn't have two Oxygen sensors though to worry about. An O2 substitute may work to trick the PCM in believing everything is okay back there though.....never tried it myself yet. You still have to put "something" in the CAT'* place though! A straight pipe will not do it. With my setup I noticed more power & a nice rumble sound from the factory Hi-Perf muffler too. Another, alternative is getting a Hi-Flow CAT like this: MagnaFlow Universal Catalytic Converter
I would install a Hi-Flo CAT if I really had to but have to stick with my claims of more Hp and torque without one, no matter if it'* NA or not. None of the other cars I have done it to were blown and they all were able to spin the tires on take off when I removed the CAT as opposed to before when they wouldn't spin a tire....unless I ran in reverse then dropped it into drive....ouch!

The O2 spoof work fine. I tried it first for a few months before removing the CAT just to make sure.

You can't really blame our Club executives for denying the benefits of removing a regulatory device. They would get into big trouble legally and maybe even morally if they didn't.
2000SilverBullet is offline   Reply With Quote
Old 02-22-2004, 03:37 PM   #15
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

willwren is offline   Reply With Quote
Old 02-22-2004, 05:01 PM   #16
Senior Member
True Car Nut
 
Join Date: May 2002
Location: Edmonton, AB Canada
Posts: 2,621
Thanks: 0
Thanked 0 Times in 0 Posts
DeathRat is on a distinguished road
Default

Quote:
Originally Posted by 2000SilverBullet
You can't really blame our Club executives for denying the benefits of removing a regulatory device. They would get into big trouble legally and maybe even morally if they didn't.
LOL!
Glad I'm not "restricted" to such then!
But yes, you're right.
DeathRat is offline   Reply With Quote
Old 02-23-2004, 01:37 AM   #17
Senior Member
Certified Car Nut
 
Join Date: Jul 2003
Location: Robbinsdale, MN
Posts: 15,408
Thanks: 0
Thanked 0 Times in 0 Posts
MOS95B is on a distinguished road
Default

Just as a Counterpoint . I can spin the snot out of my tires, and I'm NA with the Cat and pretty good tires....
MOS95B is offline   Reply With Quote
Old 02-23-2004, 01:51 PM   #18
Senior Member
Certified Car Nut
 
Join Date: Jun 2003
Posts: 15,928
Thanks: 0
Thanked 0 Times in 0 Posts
BonneMeMN is on a distinguished road
Default

Quote:
Originally Posted by MOS95B
Just as a Counterpoint . I can spin the snot out of my tires, and I'm NA with the Cat and pretty good tires....
Ditto.
BonneMeMN is offline   Reply With Quote
Old 02-23-2004, 02:29 PM   #19
Senior Member
Posts like a 4 Banger
 
Join Date: Mar 2002
Location: Edmonton
Posts: 109
Thanks: 0
Thanked 0 Times in 0 Posts
SSEi is on a distinguished road
Default

Someone said that the there is a bad smell from running without a cat, a smell of rotten eggs. Im sorry but thats wrong, the rotten egg smell is the smell you get from most new catalytic converters. Tha't'* why when you drive behind a new car and he is running it hard you have that smell usually, and if your behind an old car that smells like rotten eggs then he probably got a new cat installed. I run without a cat and so does my dad, there is no differnace in smell from before or after removing the cat. What did i notice from removing it? Better fuel economy, a rumble, better low end torque, and more responsive. In place of my cat i have about 4 feet of resonator pipe that is glass packed. Where i am it'* legal to run without cats, no laws saying you need one. However, i will probably soon goto a high flow catalytic converter.
SSEi is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Would it cause problems to eliminate the catalytic converter rstrunk 1992-1999 27 02-22-2008 04:37 AM
To CAT or not to CAT... Sol Performance, Brainstorming & Tuning 11 07-08-2004 08:19 AM
High Flo Cat vs No Cat blackssei 2000-2005 3 05-23-2004 02:45 AM
cat or no cat? iz zero back pressure ok? or.. no? delta8t8 1987-1991 3 06-16-2003 10:57 AM
Possible to eliminate AC from the picture? delta88 Performance, Brainstorming & Tuning 6 02-19-2003 10:03 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 11:27 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.