SaturnFans.com
what's new (beta) - classifieds - forums - photos


Go Back   SaturnFans.com Forums > Models > Saturn S-Series > S-Series Mods
Register FAQ Members List Groups Calendar Chat Room Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Display Modes
Old 03-19-2008, 10:03 PM   #1
krimson
Junior Member
krimson is on a distinguished road
 
Join Date: Mar 2008
Location: Atlantic Beach Fla
Posts: 22

2001 SC1
Default sc1 CATS and O2's

Alright, heres a common mod I've done w/previously owned cars. When 1 O2 sensor is present pre-cat converter, you can hollow or remove your cat, but on this 2001 sc1 there are 2 o2 sensors and 2 cat converters. Working down the exhaust stream now: exhaust manifold has a built-in cat w/ 02 sensor before the cat, further down the line (of course) another cat and o2 sensor after it.
Is the 1st cat a Cali emissions thing, and can it be hollowed without throwing a code or the use of an O2 Simulator? Thanx

REWARD EXCELLENCE!

Add to krimson's Reputation
Rate the quality of this post and help krimson reputation points. Click the reputation button near the bottom left corner of this message box. Thank you!
krimson is offline   Reply With Quote
SaturnFans.com Sponsored Links
Old 03-19-2008, 10:09 PM   #2
97sleeper
Member
97sleeper is on a distinguished road
 
97sleeper's Avatar
 
Join Date: Jun 2006
Location: Eden/Evans, NY
Posts: 416

1997 SL2
Default Re: sc1 CATS and O2's

Yes, the 1st cat is a Cali emissions deal, you can hollow it out but as a warning it may set a code off because of it though. I'm not 100% sure on that but I'm sure someone will chime in to add.

...
A good Saturn is a good sleeper -J. Beanan
97 SL2
-N/A sleeper build, check my profile the list
93 Ford Exploder
-5spd 4WD 4.0L V6
-800W sound system
-4 100W lights

REWARD EXCELLENCE!

Add to 97sleeper's Reputation
Rate the quality of this post and help 97sleeper reputation points. Click the reputation button near the bottom left corner of this message box. Thank you!
97sleeper is offline   Reply With Quote
Old 03-19-2008, 10:11 PM   #3
Firehawk_1989
Member
Firehawk_1989 is on a distinguished road
 
Firehawk_1989's Avatar
 
Join Date: Apr 2006
Location: Iowa
Posts: 153
 

2002 SC2
1993 SL2
Default Re: sc1 CATS and O2's

I'm not sure what you mean buy 2 cats, one being in the exhaust manifold. (could you get a picture maybe?) But, you can not hollow out your cat without setting a code, caused by the downstream 02 sensor. Just leave your cat how it is, and replace if needed. You won't see any real noticable gain from gutting it, besides a nice little light in your dash, telling you you messed it up. And I would never use an 02 simultor. but thats just me. hope this helps you out! :-)

...
2002 SC2 Manual
1993 SL2 Manual (sold :'-( )
1989 Firebird

http://www.dailychoosings.blogspot.com

REWARD EXCELLENCE!

Add to Firehawk_1989's Reputation
Rate the quality of this post and help Firehawk_1989 reputation points. Click the reputation button near the bottom left corner of this message box. Thank you!
Firehawk_1989 is offline   Reply With Quote
Old 03-19-2008, 10:12 PM   #4
Firehawk_1989
Member
Firehawk_1989 is on a distinguished road
 
Firehawk_1989's Avatar
 
Join Date: Apr 2006
Location: Iowa
Posts: 153
 

2002 SC2
1993 SL2
Default Re: sc1 CATS and O2's

ah, well as 97 sleeper confirmed, its a cali thing, thats why i have not seen it. you will most likely set a code though.

...
2002 SC2 Manual
1993 SL2 Manual (sold :'-( )
1989 Firebird

http://www.dailychoosings.blogspot.com

REWARD EXCELLENCE!

Add to Firehawk_1989's Reputation
Rate the quality of this post and help Firehawk_1989 reputation points. Click the reputation button near the bottom left corner of this message box. Thank you!
Firehawk_1989 is offline   Reply With Quote
Old 03-19-2008, 10:19 PM   #5
krimson
Junior Member
krimson is on a distinguished road
 
Join Date: Mar 2008
Location: Atlantic Beach Fla
Posts: 22

2001 SC1
Default Re: sc1 CATS and O2's

Thanxs for the info guys. What I am gonna do though is soon acquire a used manifold from a yard or elsewhere for little to nothing and hollow that one and test.

REWARD EXCELLENCE!

Add to krimson's Reputation
Rate the quality of this post and help krimson reputation points. Click the reputation button near the bottom left corner of this message box. Thank you!
krimson is offline   Reply With Quote
Old 03-20-2008, 01:16 AM   #6
madpogue
Super Member
madpogue has much to be proud ofmadpogue has much to be proud ofmadpogue has much to be proud ofmadpogue has much to be proud ofmadpogue has much to be proud ofmadpogue has much to be proud ofmadpogue has much to be proud ofmadpogue has much to be proud of
 
Join Date: Sep 2004
Location: Madison, WI USA
Posts: 25,715
 

1996 SW2
Default Re: sc1 CATS and O2's

Or look for a non-CA manifold.

REWARD EXCELLENCE!

Add to madpogue's Reputation
Rate the quality of this post and help madpogue reputation points. Click the reputation button near the bottom left corner of this message box. Thank you!
madpogue is offline   Reply With Quote
Old 03-20-2008, 01:25 AM   #7
97sleeper
Member
97sleeper is on a distinguished road
 
97sleeper's Avatar
 
Join Date: Jun 2006
Location: Eden/Evans, NY
Posts: 416

1997 SL2
Default Re: sc1 CATS and O2's

Quote:
Originally Posted by Firehawk_1989 View Post
ah, well as 97 sleeper confirmed, its a cali thing, thats why i have not seen it. you will most likely set a code though.
Yea, Cali wasn't the only place that they sold the Cali emissions set up cars but it is what the set up is named after. I just think they didn't sell many outside of Cali, thats all.

...
A good Saturn is a good sleeper -J. Beanan
97 SL2
-N/A sleeper build, check my profile the list
93 Ford Exploder
-5spd 4WD 4.0L V6
-800W sound system
-4 100W lights

REWARD EXCELLENCE!

Add to 97sleeper's Reputation
Rate the quality of this post and help 97sleeper reputation points. Click the reputation button near the bottom left corner of this message box. Thank you!
97sleeper is offline   Reply With Quote
Old 03-20-2008, 07:05 PM   #8
cloud819
Master Member
cloud819 will become famous soon enough
 
cloud819's Avatar
 
Join Date: Mar 2003
Location: Albuquerque
Posts: 2,313
 

2001 SC2
Default Re: sc1 CATS and O2's

My 2001 SC2 had a precat and deleting it did nothing to codes. Mine went bye bye because of a header install.

I wouldn't do it unless the thing is clogged. It isn't really worth anything on a SOHC, thety doesn't breath. If you need to do it because it is clogged, cool. But it isn't worth the time performance wise.

REWARD EXCELLENCE!

Add to cloud819's Reputation
Rate the quality of this post and help cloud819 reputation points. Click the reputation button near the bottom left corner of this message box. Thank you!
cloud819 is offline   Reply With Quote
Old 03-22-2008, 10:56 AM   #9
krimson
Junior Member
krimson is on a distinguished road
 
Join Date: Mar 2008
Location: Atlantic Beach Fla
Posts: 22

2001 SC1
Default Re: sc1 CATS and O2's

So, Cloud 819, bottom line what you're saying is, if I knock out the pre-cat biscuit in the manifold it will not throw a code? As far as the SC1 not able to breath I have to beg to differ. I fully ported polished and matched from the air entry (all sharp edges smooth and polished), to throttle body (bored and and port matched), to intake manifold (port matched), to exhaust(ported and polished) and this thing scoots tremendously more than stock. All I want to do is free up a little more back-pressure, not alot. So honestly now, If I do that, it will not throw a code? thanx

REWARD EXCELLENCE!

Add to krimson's Reputation
Rate the quality of this post and help krimson reputation points. Click the reputation button near the bottom left corner of this message box. Thank you!
krimson is offline   Reply With Quote
Old 03-24-2008, 06:59 PM   #10
cloud819
Master Member
cloud819 will become famous soon enough
 
cloud819's Avatar
 
Join Date: Mar 2003
Location: Albuquerque
Posts: 2,313
 

2001 SC2
Default Re: sc1 CATS and O2's

Quote:
Originally Posted by krimson View Post
So, Cloud 819, bottom line what you're saying is, if I knock out the pre-cat biscuit in the manifold it will not throw a code? As far as the SC1 not able to breath I have to beg to differ. I fully ported polished and matched from the air entry (all sharp edges smooth and polished), to throttle body (bored and and port matched), to intake manifold (port matched), to exhaust(ported and polished) and this thing scoots tremendously more than stock. All I want to do is free up a little more back-pressure, not alot. So honestly now, If I do that, it will not throw a code? thanx

It shouldn't throw a code.

SOHCs don't breath. A fully port matched SOHC with headers and an intake, won't outflow a stock DOHC. If you are into taking taking apart the top part of the engine, why not slap a DOHC head on it and swap the other things need to make it a DOHC? If I recall the 2000+ SOHC have the same bottomend as the 2000+ DOHCs.

REWARD EXCELLENCE!

Add to cloud819's Reputation
Rate the quality of this post and help cloud819 reputation points. Click the reputation button near the bottom left corner of this message box. Thank you!
cloud819 is offline   Reply With Quote
Old 03-24-2008, 09:13 PM   #11
krimson
Junior Member
krimson is on a distinguished road
 
Join Date: Mar 2008
Location: Atlantic Beach Fla
Posts: 22

2001 SC1
Default Re: sc1 CATS and O2's

Look. No disrespect intended here, but I thought the whole point of "Tuning" is working with what you've got. I dont have a DOHC and Im not trying to make one. Im working with the SOHC because it was a steal at the time, and taking things apart to make things more efficient is a passion for me. Not many people will put this much effort into something like this SOHC, and Ive spent no money except 35 for an intake and everything else was done by my hands and Ive squeezed out more power, torque and gas mileage out of it. Thats an achievement in my opinion not a waste of time.
Thank you for confirming my question about the O2 codes.

REWARD EXCELLENCE!

Add to krimson's Reputation
Rate the quality of this post and help krimson reputation points. Click the reputation button near the bottom left corner of this message box. Thank you!
krimson is offline   Reply With Quote
Old 03-24-2008, 10:46 PM   #12
cloud819
Master Member
cloud819 will become famous soon enough
 
cloud819's Avatar
 
Join Date: Mar 2003
Location: Albuquerque
Posts: 2,313
 

2001 SC2
Default Re: sc1 CATS and O2's

Quote:
Originally Posted by krimson View Post
Look. No disrespect intended here, but I thought the whole point of "Tuning" is working with what you've got. I dont have a DOHC and Im not trying to make one. Im working with the SOHC because it was a steal at the time, and taking things apart to make things more efficient is a passion for me. Not many people will put this much effort into something like this SOHC, and Ive spent no money except 35 for an intake and everything else was done by my hands and Ive squeezed out more power, torque and gas mileage out of it. Thats an achievement in my opinion not a waste of time.
Thank you for confirming my question about the O2 codes.
No disrespect taken. I completely understand working with what you have. I think it is really cool to "perfect" a design, no mater how silly the work may seem to others. But you should also realize where the limiting weakness is. You said they can breath.

While you can make them better, you are still limited by the design itself. I doubt a SOHC can out breath a cat in good condition. My lawnmower can out breath a clogged cat. If it is clogged it is robbing you of power, if it is not, then there is no really measureable power to be gained.

REWARD EXCELLENCE!

Add to cloud819's Reputation
Rate the quality of this post and help cloud819 reputation points. Click the reputation button near the bottom left corner of this message box. Thank you!
cloud819 is offline   Reply With Quote
Old 03-24-2008, 11:15 PM   #13
krimson
Junior Member
krimson is on a distinguished road
 
Join Date: Mar 2008
Location: Atlantic Beach Fla
Posts: 22

2001 SC1
Default Re: sc1 CATS and O2's

Im glad you understand. and I do know that it is a SOHC and its valve-train is very simple. As a matter of fact the first thing I noticed after doing all my so-far work, and did a launch test, is that the engine wanted to keep making power past its pre-determined limits, but the last thing I want is to blow a head. The "band" now, is tuned at peak torque rpm, drops a little, then dramatically increases near redline limits and up. So my whole point of this thread is to maybe tune it to take advantage of the medium power band. I know that decreasing backpressure may not increase HP, but it can release your HP at a different band, hence different types of headers for same engines. Im hoping that having a free collector may achieve some of this. What do you think? thanx

REWARD EXCELLENCE!

Add to krimson's Reputation
Rate the quality of this post and help krimson reputation points. Click the reputation button near the bottom left corner of this message box. Thank you!
krimson is offline   Reply With Quote
Reply



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
bad cats? kingvandal S-Series General 8 04-24-2008 12:16 PM
E-pro cats go4broke Vue Mods 2 07-26-2007 03:10 PM
eBay Cats? petdmc Miscellaneous Tech 12 07-05-2004 09:20 PM
Stupid cats (scratches) KJB Vue General 23 01-24-2004 03:03 AM
Cats out of the bag poly L-Series General 1 12-23-2003 03:23 PM


All times are GMT -4. The time now is 04:31 AM.

Advanced Forum Search | Advanced Photo Search


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
SaturnFans.com. The Saturn Enthusiasts Site.