Hollowing out the catalytic converter on VX - Page 2 - Fuelly Forums

Click here to see important news regarding the aCar App

Reply
 
Thread Tools Display Modes
 
Old 05-07-2010, 11:44 PM   #11
Registered Member
 
GasSavers_JoeBob's Avatar
 
Join Date: Oct 2007
Posts: 698
Country: United States
Quote:
Originally Posted by JoeBob View Post
I tried removing the cat on my Chevette some years ago when I was trying to track down some problems with FE. Over several tanks, noticed no difference in performance or FE. Put it back on. Conclusion: A properly functioning cat has no deleterious effects on performance or FE. Better to use it, be in legal compliance, and pollute less.
The car did sound pretty cool running straight-piped, however. But the stern stares from several Sheriff's deputies convinced me that it was in my best interest to return the exhaust system to its original condition...
__________________

__________________
"We are forces of chaos and anarchy. Everything they say we are we are, and we are very proud of ourselves!" -- Jefferson Airplane

Dick Naugle says: 1. Prepare food fresh. 2. Serve customers fast. 3. Keep place clean.



GasSavers_JoeBob is offline   Reply With Quote
Old 05-08-2010, 09:06 AM   #12
Registered Member
 
VetteOwner's Avatar
 
Join Date: Mar 2007
Posts: 1,546
Country: United States
Quote:
Originally Posted by JoeBob View Post
The car did sound pretty cool running straight-piped, however. But the stern stares from several Sheriff's deputies convinced me that it was in my best interest to return the exhaust system to its original condition...
lol my chevettes has rusted off in several occasions and i must say straight piped does make it sound neat makes it sound like a rally car

mine currently has no cat and stock muffler. at idle it has a nice little diesel sound (its a gas engine) it can and does pop when engine braking sometimes or if i rev it.

heck if motorcyclist can get by on that stupid excuse by saying straight pipes make me more noticeable (dont need to notice you in my house a mile away from the highway) so i don't get hit I can use that same excuse with my tiny car that goes nowhere fast.

cops around me tend to like my car, one just laughed as i went buzzing by goin 85 in a 55
__________________

VetteOwner is offline   Reply With Quote
Old 05-10-2010, 09:34 AM   #13
Senior Member
 
Join Date: Aug 2012
Posts: 261
Country: United States
Location: The slums of Beverly Hills
Quote:
Originally Posted by willix View Post
most all cars pass emmissions tests without a cat since the late eighties.
This is NOT true.
dieselbenz is offline   Reply With Quote
Old 05-11-2010, 02:53 PM   #14
Junior Member
 
willix's Avatar
 
Join Date: Jun 2010
Posts: 26
Country: United States
Location: pigseye, mn
Yes they will, pass emissions yes, visual/physical inspection fails no cat. Fuel injection & obd 1 cars are very well managed by engine/emission controls. 1986-87 the new age of V6's & 4's multi over head cams as well as the push rod motors, body & port injection better best thing since sliced bread. American & japan
willix is offline   Reply With Quote
Old 05-12-2010, 05:10 AM   #15
Registered Member
 
Join Date: Nov 2007
Posts: 1,852
Country: United States
Location: north east PA
Is it pass emissions as in pass the minimum standard, or pass in the car's certified rating? Will the SULEV car still be SULEV without the cat, or does it drop to Bin II?
trollbait is offline   Reply With Quote
Old 05-12-2010, 05:15 AM   #16
Registered Member
 
theholycow's Avatar
 
Join Date: Apr 2008
Posts: 6,624
Country: United States
Send a message via ICQ to theholycow Send a message via AIM to theholycow Send a message via MSN to theholycow Send a message via Yahoo to theholycow
I would define "pass emissions" as meaning that you are allowed to continue driving the vehicle without changing or repairing it.
__________________
This sig may return, some day.
theholycow is offline   Reply With Quote
Old 05-12-2010, 11:34 PM   #17
Registered Member
 
fowljesse's Avatar
 
Join Date: Mar 2008
Posts: 188
Country: United States
Just to answer the question; I found no ill affects when I gutted mine. It was so clogged that I couldn't see through it, and a new one for my car is around $250. It sounds better now (barely noticeably louder from the outside), and my mileage went up (of course, since it was clogged), and I have passed yearly emissions 3 years since then. I get about 5 more MPG than EPA says, when I drive normally, and a couple more when driving for FE. The MX-3 V6 burns clean, though. I don't know about other cars.
Quote:
Originally Posted by giperbolic View Post
I did search and this was asked once before, but I couldn't find an answer. What are the negative affects of gutting the internals of catalytic converter on VX except noise, smell, high NOX emissions? Are there any FE, O2 life, engine affects?
Also, how do check if cat is bad? The engine I swapped in my car has been sitting for 11 years, so I figured cat is rusted and clogged, but I haven't opened it up to look. Engine is running.
Thank you.
fowljesse is offline   Reply With Quote
Old 05-13-2010, 06:05 AM   #18
Registered Member
 
Join Date: Nov 2007
Posts: 1,852
Country: United States
Location: north east PA
Quote:
Originally Posted by theholycow View Post
I would define "pass emissions" as meaning that you are allowed to continue driving the vehicle without changing or repairing it.
Some states actually measure what's coming out of the tail pipe though. Then it's a matter of the law requiring that the car meets it's Carb or Fed rating, or some minimum rating. A blanket statement of "pass emissions" may not apply in all areas.

I knew a guy who had the cat hollowed out on a Ranger here, and had no problem passing inspection.

I don't know what platinum is going for, but selling the old cat to a recycling shop will offset the cost of a new one.
trollbait is offline   Reply With Quote
Old 05-13-2010, 08:19 AM   #19
Registered Member
 
theholycow's Avatar
 
Join Date: Apr 2008
Posts: 6,624
Country: United States
Send a message via ICQ to theholycow Send a message via AIM to theholycow Send a message via MSN to theholycow Send a message via Yahoo to theholycow
"Pass emissions" is definitely dependent on jurisdiction. In RI, the car is put on a dyno and a sniffer is put in the tailpipe. Cars over 25 years old (my Buick) and trucks over 8,600 pounds (IIRC) are exempt.
__________________
This sig may return, some day.
theholycow is offline   Reply With Quote
Old 05-13-2010, 08:32 AM   #20
Registered Member
 
GasSavers_BEEF's Avatar
 
Join Date: Apr 2008
Posts: 1,831
in NC it is done county by county. the county I live in only requires the OBDII check which means you fail with a CEL code. older than 1996 and they don't care.

the county beside of mine has no emissions. their inspections run $9.10 where as mine is right around the $30 mark. they also have the worst schools around and little to no industry.
__________________

__________________
Be the change you wish to see in the world
--Mahatma Gandhi



GasSavers_BEEF is offline   Reply With Quote
Reply

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
600 Mile Round Trip Ford Man General Fuel Topics 3 10-27-2008 05:33 PM
Am I crazy for thinking like this? imzjustplayin General Discussion (Off-Topic) 24 10-19-2008 07:53 PM
Fiesta Diesel clocked at 74.05 mpg (31.48 kms per litre) RightontheMarc Car Reviews 5 06-07-2008 03:22 AM
Is there a OBDI or OBDII conversion for older vehicles? kozaz General Fuel Topics 3 11-13-2007 07:32 PM
'93 Chevy 2500 4x4 + Trailer: Help! rh77 General Fuel Topics 9 09-15-2007 08:31 AM

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


All times are GMT -8. The time now is 02:28 AM.


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