Exhaust question non-bonneville - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Lounge For casual talk about things unrelated to General Motors. In other words, off-topic stuff. And anything else that does not fit Section Description.

Reply
 
 
 
Thread Tools Search this Thread
Old 08-20-2007, 10:00 AM   #1
Junior Member
Thread Starter
 
Join Date: Mar 2006
Location: Purgatory
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
myfirstbonnie is on a distinguished road
Default Exhaust question non-bonneville

I was just wondering on my 95 burb (5.7 L), if the exhaust was made to be a true dual would there need to be dual O2 sensors? I have found many sites that will dual it after the cat and have headers, but none have a set up for true duals.

Also, if two are needed how would that be accomplished?
myfirstbonnie is offline   Reply With Quote
Old 08-20-2007, 10:09 AM   #2
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

Not sure if it'* the same..

My 00 Silverado 5.3 has 4 O2'* because of the dual cats on it from the factory. Do you have dual cats before it dumps into a single pipe?
BillBoost37 is offline   Reply With Quote
Old 08-20-2007, 10:20 AM   #3
Senior Member
True Car Nut
 
Join Date: Sep 2006
Location: Somewhere south of Ottawa with your girlfriend driving faster then you.
Posts: 3,277
Thanks: 0
Thanked 0 Times in 0 Posts
ReallyAGXP is on a distinguished road
Default

IF you have a true dual set up you need 2 cats and extra 02'*.
ReallyAGXP is offline   Reply With Quote
Old 08-20-2007, 10:23 AM   #4
Junior Member
Thread Starter
 
Join Date: Mar 2006
Location: Purgatory
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
myfirstbonnie is on a distinguished road
Default

Quote:
Originally Posted by BillBoost37
Not sure if it'* the same..

My 00 Silverado 5.3 has 4 O2'* because of the dual cats on it from the factory. Do you have dual cats before it dumps into a single pipe?
I have a cat that contains the y pipe and attaches to the manafolds. There is one O2 sensor at the y on the cat. This link will show you what the cat looks like.
http://www.partsamerica.com/ProductD...pe=145&PTSet=A

My desire is to have a true dual system with dual cats, but I just don't know how the system would respond with only one bank of cylinders being monitored by a single O2 sensor. By the way this is still a TBI motor.
myfirstbonnie is offline   Reply With Quote
Old 08-20-2007, 10:42 AM   #5
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

You won't be able to add an O2 behind the second cat..the PCM won't have an input. j

I wonder if the new piece would be an H pipe which would give you good readings after the dual cats.
BillBoost37 is offline   Reply With Quote
Old 08-20-2007, 10:49 AM   #6
Junior Member
Thread Starter
 
Join Date: Mar 2006
Location: Purgatory
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
myfirstbonnie is on a distinguished road
Default

I think there is a little misunderstanding. I have a one cat and one O2 sensor (before the cat). If I dual the exhaust do I need to have an O2 sensor in both pipes before each cat.
Or will it be okay to run dual exhaust, dual cat and single sensor before one of the cats.
myfirstbonnie is offline   Reply With Quote
Old 08-20-2007, 10:51 AM   #7
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

I'm onboard with you.

And completely unsure how you could hook up extra sensors on a system that wasn't designed for more than the number you currently have.

Have you checked with any of the truck forums?
BillBoost37 is offline   Reply With Quote
Old 08-20-2007, 11:11 AM   #8
Junior Member
Thread Starter
 
Join Date: Mar 2006
Location: Purgatory
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
myfirstbonnie is on a distinguished road
Default

Yeah, they all suggest an H or X pipe before the cats and put the sensor in there. Local muffler shop just wants to put it in the right bank, just not sure how that will affect the tuning loop since it would only be sensing the exhaust from only half the cylinders. What is your opinion on the single O2 for the right side and none on the left?

My problem with the H or X pipe is the clearance being that the truck is 4x4 I don't want it hanging too low.
myfirstbonnie is offline   Reply With Quote
Old 08-20-2007, 11:20 AM   #9
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

I would H or X.. that will mix the exhaust from both sides and allow for the "best" reading. True duals w/o the H or X could have one side to have an issue that is never detected by the other side.
BillBoost37 is offline   Reply With Quote
Old 08-20-2007, 11:21 AM   #10
Junior Member
Thread Starter
 
Join Date: Mar 2006
Location: Purgatory
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
myfirstbonnie is on a distinguished road
Default

That was what I was thinking. Thanks for the input, now I have a project to get the funding approved for (the wife) if ya know what I mean?
myfirstbonnie is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Part question (T2V PS vs. non-T2V) zuper8 General GM Chat 2 03-14-2008 02:24 PM
Non Bonnevile tech question roadtech195 Lounge 9 10-10-2007 06:43 PM
hopefully you can help, non bonneville question demonic Lounge 2 08-03-2006 10:13 PM
Non Pontiac OEM Radio Question mremer Audio (and aftermarket electronics) 7 01-17-2005 02:28 PM
Exhaust Question : Headers & Exhaust Charlie Performance, Brainstorming & Tuning 29 08-09-2004 11:03 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 08:47 AM.


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.