Anyone removed their Catalytic Converter?

I don't want to end the party here but...
:yield:
The catalytic converter is there for something.

I really don't think that removing the converter will worth more NOx and others bad gaz to be released. It would be interesting to do dyno test run to see the 0.25 hp gain over 110.

I think there is a lot more to do in reducing weight on our fat ass bikes...

For more power, get a gsx-r1000, r1 or busa with a cat converter.

 

Confused ??

 

Maybe you could rephrase it. :biggrin:

 

Ok. I'm french.

The combustion of gasoline with air (composed of a lot of nitrogen) in cylinders produce water, CO2, and NOx because of the combustion heat. The catalytic converter is used as a catalyser to help transform toxic gas (NOx) into something less toxic.

NOx gas are responsible (in high proportion) for smog. I don't know how it's called in english but it's also a "gaz à effet de serre" which comtributes to warm the earth.

Is that better ?

 

Pas de problem j'habite l'hexagon. :smile:

C'est super, merci. :smile:

Having taught science in a previous life I'm fairly au fait with the reasons for the cat (although I think it's a crappy concept). I'm not sure you're right about the power gains, but in any case you're right in that chasing bhp on a vtec is a waste of energy. Improving driveability is another issue entirely though, and there have been reports that taking the cat out can do this.
People will make their own minds up, all I've done is comment on the legalities.

 

In the UK teh MOT test for cars includes emissions (not sure hether age of car makes any difference to test) but the motorbike test doesn't include emissions.

See link below

http://www.direct.gov.uk/en/Motoring/OwningAVehicle/Mot/DG_10016070

 

YOUR are right they just test cars not bikes was at the mot today couldnt get anything in wrighting however I got speakin to one of the guys, they where ment to start bikes however there is no rule as yet....

my misstake, i just thought that because cars have to be tested that bikes do to. I've never had to mot any of my bikes so couldnt tell on my own half...

:redface: :redface: :redface: Silly me:redface: :redface: :redface:

 

I have to admit that I'm really not concerned in the least about the overhyped global warming craze. It makes more sense to me that the heating and cooling phases of the earth have a little more to do with cycles of activity on that giant ball of nuclear energy called the sun than whats in your exhaust pipes. The earth has been going through drastic heating and cooling phases for millions of years. It wasn't exhaust gas that warmed this planet after the Ice Age.

Anyway, I'm considering doing the same thing (gutting the cat) on my 5th gen so I'm also curious to hear some results from anyone whos done this.

 

I would call canib whiskey technology's for the ultimate cat upgrade for a fifth of jack you to will recive a low quality pipe with a lose in performance..i would go with the tack wielded chain link fence post system with duct tape siding it is a provin favorite up the seat look and an old lunch box wielded to it thats the new hi-flow cat. its guarenteed for one minute and has a life spain of how many years the A-team box is supposed to flow the most carbons but i think its on back order the other one is the KISS lunch box but they cost alot get the one with the long tounge that gets mello and drewl hot....

 

I agree about cooling and heating phases. I also agree that it's probably too late to do something about warming but I think you could be at least concerned for smog and air quality...

 

Hype or not, it should be clear to anyone that when you pump tons upon tons of NOx, HC, and CO into the atmosphere that otherwise wouldn't be there naturally, it is bound to have some kind of effect. It goes somewhere--it doesn't just turn into rock or sublime into pixie dust. People get too hung up on the one-dimensional view, citing the sun, volcanoes, cow farts, etc, that they fail to see the obvious ensemble at work.

On another note, water vapor and CO2 are very effective greenhouse ingredients, and an ideal catalytic converter converts everything the engine produces into those two compounds... Yikes! I bet a lot of people would reverse their stubborn "we have nothing to do with global warming" stance if it was common knowledge that catalytic converters actually enhance it. :tongue:

 

Thanks to have a head over your shoulders :wink:

CO2 and water are way less damageable than others gases.

 

Ponder for a moment the natural phenomenon of volcanoes erupting, forest fires burning, meteors burning up in the atmosphere, and don't forget inside the Earth is a gigantic ball of burning rock. Each one alone is devastating. Each one alone pumps millions of tons of toxins and chemicals into the air. Now consider that this has been going on for Millions of years...

I think nature has a bit more impact than Mankind.

You start to see why I'm a little skeptical of the hype that says Mankind over the last 80 years (since heavy industrialization began) is "causing global warming"...

It wasn't long ago (the 70's) that many scientists were absolutely positive we were going into the next Ice Age. Back then everyone was screaming and crying about Global Cooling. What this tells us is that the reality is we know very little about the Earths heating and cooling cycles and it's really naive to think that we all of a sudden have it all figured out. It's also naive to think that mankind in 80 years could even come close to having the kind of impact on the planet that all of the complex forces of nature do...

But we are certainly digressing from the question that actually started this thread which was a question about the performance aspects of removing the cat.

 

You forgot to mention cow farts. :biggrin:

To each his own. I believe we contribute to greenhouse gas emissions, and we should do everything we can to reduce that contribution. These theories have been around for as long as I've lived, and they've done nothing but gain credence because the evidence isn't obscure--it's clear as day. You don't have to be a scientist, a former vice president, or a disgustingly obese political blowhard on daytime radio to see the flow of logic.

 

wow we went from removing a cat to figuring out the planets future plans to expand and contract heat and cool but ohh yea did anyone findout if there was an after market hi-flow cat for more power? i think honda probably got that right and no aftermarket gonna waste there time designing one becuase we are not track bikes persay plus they may be l8 to the big bbq this weekend .............dont forget to wash your hands.....may catch something

 

Well my cat has gone to that great big cat house in the sky, many moons ago BTW.
It has a twin custom made 2" system with staintunes, no baffles. The cat was completely removed and a connector plate welded on.
It also has the O2 sensors still connected! and guess what it runs fine. The pair valves are blocked and that is about it.
I have always been a fly by the seat of the pants kind of bloke and don't need tacho's to tell me when to change gears, that said I didn't waste a bunch of $$$"s putting it on a dyno to tell me the top end is much better, mid range and bottom end is about the same I would guess.
Did I mention the top end is better, much better!!:biggrin: :smile:







As far as global warming concerned I believe it is just another sinister ploy, control measure to restrict us more and drag more tax $$ from our pockets

 

Another thing worthy of mention is when I was drag racing street cars you didn't restrict the exhaust you removed as much restriction as possible. You would also made it less restrictive on the intake side as well. This was the first step to producing more power!

 

You just plugged the second O2 sensor back in and you're not getting engine codes or any problems?

 

http://vfrworld.com/forums/modifications/14065-big-nasty-cat.html