I emptied my cath converter. The CEL came on. So I wrapped the O2 sensor with foil. It came off. At the same time I changed the oil. I used for the first time Castrol full syntec and added 1/2 litre of Lucas oil addidive. I noticed right away a much better throtle responce and the engine is much smoother. It`s hard on gas due to the wrapped up o2 sensor but it works good. What could have made such a difference? The o2 sensor, the syntec oil, the additive? I really don`t get it....

 

Moving To The Engine Forum....

 

It's call the placebo effect. I'd be williing to bet you, had you dyno'd your car before and after, you would not register more than a 2-3 HP gain. But since you know you did something, you think you can feel a difference.

Please, please, please do not "gut" or remove your cat/cats. Once car without a cat puts out as much emissions as 100 cars with cats. High flow cats only run $50 or $60 bucks.

If your going to modify your car...do it the right way. That tin foil in your exhaust stream is not going to last very long.

 

Actually it's the Oil change he noticed, your car runs so much better right after a good oil change right up to 2000 km after, then it's downhill till the next change. YOU GUT THE CAT !!!!!! in Canada thats bad news, and guess what the Cel will come back to, but please put a cat back in, it really doen't help with out it.

 

I didn`t empty it for performance. I had so much trouble over the years with these dawm thing cloging up after a while that I don`t take anychance anymore. Concerning laws in Canada, here in northern NB, every older car don`t have any. By the time a meter is available around here my car car will be good for the scrap yard.

 

Old cars don't have to have cat because those cars are not affected by the law (I think). When the government makes a new law, it affects everything thereafter, but not previous things (Ex. If Cat law was established in 1960, every car before 1960 can run without cat).

 

Cars (at least in CA) that are made in 1973 and older are smog exempt. So if you get a 1972 Datsun Z, you can basically run straight piping and dump as much junk into the atmosphere as you like.

 

Dude, the thing is a gutted cat that spews all manner of BS into the air doesn't produce any noteable performance gain over just a standard free-flow cat.

Let's be real. On a 140HP engine, a gutted cat is probably worth 2HP at most. If you replaced it with a decent free-flow cat, you would probably get 1.98HP and NOT have check engine lights, bad emissions and get shyt from the cops that check it out.

Don't be a tard. I'm spending probably better than $8000 to make sure I have the single fastest (single engined ) Tiburon in the United States, but it's sure as hell going to run a cat for it's entire life. I'd rather lose the 0.4 horsepower than have to worry about getting crap from the popo or the state because of a missing cat.

$60 for an absolute top-notch carsound cat is CHEAP guys, don't skimp on the simple shyt.

-Red-

 

Where can you purchase a Carsound 3inch inlet high flow Cat for $60.I reemeber Random saying where to get them but would you happen to have a website?
Also whats the difference betwwen 2 or 3 way.Which one for a Turbo charged car should i get Thanks!!

 

2uniq-

Drop a mail message to Jaws021. He is the guy with the hookup for cheap carsound cats.

btw...the website for them is http://www.car-sound.com/ They are also owned by Magnaflow, or magnaflow owns them...I can't tell which.

In regards to HOW a cat works and the differences between the types....

Two-Way Oxidation Converter
A Two-Way converter, used on cars between 1975 - 1980, oxidizes unburned harmful hydrocarbons and carbon monoxide into water and carbon dioxide. The first vehicles with catalytic converters had Two-Way Oxidation only capabilities.
HC, CO OXYDIZES TO H20 and CO2

Three-Way Reduction/Oxidation Converter
A Three-Way converter is a triple purpose converter. It reduces nitrous oxides into nitrogen and oxygen. And, like the two-way converter, it oxidizes unburned harmful hydrocarbons and carbon monoxide into water and carbon dioxide.
NO2 REDUCES TO N2 and 02
HC, CO OXIDIZES TO H20 and CO2

Three-Way + Air Reduction/Oxidation Converter
A Three-Way + Air converter performs the same functions as the Three-Way converter. It oxidizes and reduces. The difference is the addition of secondary air between the two internal catalyst substrates that improves the oxidation capabilities of the converter. The secondary air is pumped into the middle of the converter between two seperate catalyst coated ceramic substrates. The front ceramic performs the reduction and the back ceramic performs the oxydation. Its like having two converters in one.
NO2 REDUCES TO N2 and 02
HC, CO OXIDIZES TO H20 and CO2

Pre-Converter and Main Converter
Each of the three types of converters mentioned above have a common need in order to function properly. Each needs to reach a minimum operating temperature before any emission reduction or oxidation takes place. This warm-up period immediately after a vehicle is started is when the catalytic converter is least efficient and the vehicle expels the most pollutants. Some vehicles employ a pre-converter in the exhaust system immediately after the manifold to help during this warm-up period. The pre-converter’s small size and proximity to the engine allow it to heat up and start functioning in less time than the main converter. It also pre-heats the exhaust gasses and helps the main converter reach operating temperature sooner.

[ January 29, 2002: Message edited by: Random ]