2nd catalytic converter - Fuelly Forums

Click here to see important news regarding the aCar App

Thread Tools Display Modes
Old 05-06-2007, 12:34 PM   #1
Registered Member
zpiloto's Avatar
Join Date: Mar 2006
Posts: 1,225
Country: United States
2nd catalytic converter

Originally Posted by repete86 View Post
What's strange is that according to the EPA, your emissions will only be slightly improved. It looks like a good candidate for an additional catalytic converter.
Didn't want to get the new car thread to OT. I thought about doing this but could not find any data that it would help. By adding a 2nd cat would it really reduce emissions? If the first one not doing the job why would the second one? It would take it much longer to get to temp because it would have to be futher down thus reducing it's efficiency by prolonging the time to light off.

zpiloto is offline   Reply With Quote
Old 05-06-2007, 12:54 PM   #2
Registered Member
Join Date: Apr 2007
Posts: 6
Country: United States
Many cars have a second cat (or in the case of my Mark VIII a third, one on each bank and a y pipe with one) to reduce emissions st startup. It takes a while for the first two to get hot and get going. This one is msotly for cold start emissions.

Spinningmarkviii is offline   Reply With Quote
Old 05-06-2007, 12:56 PM   #3
Registered Member
omgwtfbyobbq's Avatar
Join Date: Jul 2006
Posts: 1,516
Country: United States
Yup, depending... Like you said, if unburnt HC emissions from the first one are low enough, the second will have trouble or never light off. In fact, I think that's why my Camry runs so damn rich on start up. I used to fill up the tank, go two miles down the road and through a drive through, go back to the station to fill up, and found out I get ~8mpg during really short/cold trips. Unless the ECU is programmed to light it off, or the current cat is nearly dead, I don't think it'd do much.
Originally Posted by FormulaTwo
I think if i could get that type of FE i would have no problem driving a dildo shaped car.
omgwtfbyobbq is offline   Reply With Quote

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Add Groups? ScoutTech Fuelly Web Support and Community News 3 03-17-2010 10:35 PM
An idea for something new. DTMAce Fuelly Web Support and Community News 2 11-30-2009 01:55 AM
Stickers? udtrev Fuelly Web Support and Community News 2 07-30-2009 04:50 AM
Incorrect Milage Calcuatlion PatM Fuelly Web Support and Community News 4 07-17-2009 07:21 PM
Adding this to my forum site signature JonnyZero Fuelly Web Support and Community News 6 04-10-2009 07:53 AM

» Fuelly iOS Apps
No Threads to Display.
Powered by vBadvanced CMPS v3.2.3

All times are GMT -8. The time now is 06:09 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.