removing catalitic converter
Thread Starter
|
Senior User
Joined: Apr 2004
Posts: 291
Likes: 0
From: mt
removing catalitic converter
I know it is illegal, but has anyone ever completely removed the cat. converter and went with high flow mufflers. I have a 99 v10 and would like to try this. Will it hurt my 02 sensor. And what will it do to my mileage. thanks
Super Moderator
Joined: Oct 2002
Posts: 8,547
Likes: 6
From: MA
Especially on the new computer controlled vehicles, they can cause more harm than good. The sensors do not read correctly, which in turn cause the computer to compensate. That compensation can often times give you less peformance. The ideal solution is to swap in a high flow catalytic convertor. What state do you live in? Emissions testing? Visual inspections? Have you thought about resale value?
Rich
Rich
Super Moderator
Joined: Oct 2002
Posts: 8,547
Likes: 6
From: MA
If you want performance, I would go with a high flow cat. I have one on my bronco (along with high flow Y pipe), and I passed the sniffer test here in MA no problem. It hasnt set any codes either, and its been on about a year now.
Rich
Rich
Super Moderator
Joined: Oct 2002
Posts: 8,547
Likes: 6
From: MA
Trending Topics
Postmaster
Joined: Dec 2003
Posts: 3,130
Likes: 3
From: Massachusetts
4.04 (b): Procedures for Inspection of
Non-Commercial Motor Vehicles
(5) Muffler and Exhaust System. Accelerate motor to test for prevention of unnecessary noise and emission of any unreasonable amount of smoke. The exhaust system, exhaust manifold(s), exhaust pipe(s), muffler(s), and tailpipe(s), if designed to be so equipped, shall be tight and free of leaks. System components shall be securely fastened with fasteners in place and undamaged. All motor vehicle exhaust systems shall discharge the exhaust beyond operator, passenger, and/or trunk compartment. Unnecessary noise is herein defined as any noise which is louder than that emitted by the vehicle when equipped with the original manufacturer's equipment. A gas or diesel vehicle will be rejected if, at normal operating temperature, at any constant speed over 15 MPH, (approximately 1,000 to 1,200 RPM's) visible black or blue exhaust emissions are evident
This is from www.vehicletest.state.ma.us under the regulations section. You cannot increase the noise emmission over the stock system. So basically you cannot touch it at all!
Non-Commercial Motor Vehicles
(5) Muffler and Exhaust System. Accelerate motor to test for prevention of unnecessary noise and emission of any unreasonable amount of smoke. The exhaust system, exhaust manifold(s), exhaust pipe(s), muffler(s), and tailpipe(s), if designed to be so equipped, shall be tight and free of leaks. System components shall be securely fastened with fasteners in place and undamaged. All motor vehicle exhaust systems shall discharge the exhaust beyond operator, passenger, and/or trunk compartment. Unnecessary noise is herein defined as any noise which is louder than that emitted by the vehicle when equipped with the original manufacturer's equipment. A gas or diesel vehicle will be rejected if, at normal operating temperature, at any constant speed over 15 MPH, (approximately 1,000 to 1,200 RPM's) visible black or blue exhaust emissions are evident
This is from www.vehicletest.state.ma.us under the regulations section. You cannot increase the noise emmission over the stock system. So basically you cannot touch it at all!
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
Junior User
Joined: Nov 2003
Posts: 73
Likes: 0
I've removed my cat completely. Modified and returned the sensor and no problems. I lost a bit of torque but gained high speed. After about 6 months I decided to put my cat back. Oh you have to put some kind of silencer if not, it will be really LOUD 
Freshman User
Joined: Jul 2003
Posts: 27
Likes: 0
Thats all chinese to some people. All you have to do is run O2 sensor foolers, find someone to print you out a sticker without testing the vehichle, and you can make it as loud as you want. Its actually easier than you think. I have a Feb. 2005 sticker on my truck and it hasent been inspected since I bought it.
Senior User
Joined: Aug 2003
Posts: 289
Likes: 0
I have a 2000 v10 - 3" pipe from the Y-pipe to an FM40 with dual 2.5 out, I am currently in the market for a cheap high flow cat. The v10 with no cat is so loud it sets off some car alarms when I go by, I wish I never took it out.
Senior User
Joined: Jun 2003
Posts: 340
Likes: 0
From: Livonia
www.mileliminators.com will hook to your downstream o2 sensor and your computer will never know you neutered your truck exhaust
Thread
Thread Starter
Forum
Replies
Last Post
deerfieldmike
1987 - 1996 F150 & Larger F-Series Trucks
7
Dec 12, 2010 11:38 PM
givahoot
1983 - 2012 Ranger & B-Series
5
Jan 13, 2005 02:11 PM
Dragrazor
Clutch, Transmission, Differential, Axle & Transfer Case
6
May 27, 2003 08:13 PM