To Cat Or Not To Cat

[Adriano]

Why are people only concerned about outright power? Sure it may have only picked up 7hp at the top but what about midrange? What about on/off/on again throttle response, fuel economy?

Doing a dyno test tels you sweet fa realy about the drivability differences between having and not having a cat.

If he only lost 7hp at that power level, there is no way it will effect midrange, throttle response or fuel economy, although i wouldn't be surprised if he lost a few db

[Spoolup]

The point is, is that I have a cat which is a legal requirement. The other point is that with other cats around I wouldnt be able to achieve the power it is currently making.

Come for a drive, the throttle response is perfect, the mid range is intense.

Fuel economy is not worth mentioning - but you wouldnt expect it to be.

[Spoolup]

Pls explain the risks ?

Adriano - it meets ADR noise requirements - just :-)

[Adriano]

Funny isnt it, you make 600rwhp legally, yet there are many people on here who feel it is necessary to remove the cat to make 300rwhp. Who gives modified car owners a bad name?

[Spoolup]

yeah I agree, the funniest part is there are people on here who think you can make 600rwhp for $5k

I wasnt trying to make a point about my power, I was trying to point out that you can actually buy a cat that will flow that sort of power, which I find totally amazing. But maybe ists just me :-)

[br3ndan]

lol the extremes/risks some people go to for an extra 5kw baffles me...

Couldnt of said it better my self.

Cats are their for a reason...

for a extra 5kw gain, its terriably selfish to decat ur exhaust and have all that shit go out of ur car.

For anyone that is running no cat, i hope u get caught and pay big...

Its about as bad as speeding through a school zone.

[joeyjoejoejuniorshabadoo]

Uh... No...

[Ronin]

Its about as bad as speeding through a school zone.

LOL, how long do you think cats last before they do jack shit for emmissions, how many cars on the road do you think have had their cats replaced...ever.

Edited September 7, 2008 by Ronin

[br3ndan]

CATs usually dont have to replaced too often. THey can last for many many years.

But i hate it when the car infront of puts their foot down and lots of black shit comes out and smells like shit and is probably giving me cancer thru my open window.!

How hard is it to put in a nice hi flow cat!

How many HP you goint to lose? 2 or 3?

Come on guys dont b so cheap.

[toffy]

LOL!^^

ok i use both , i have a 'de-cat' pipe for track and a high flow cat for street . can you honestly tell me the average diffrence in emmisions between the pair? , i bet its not as bad as you think . Has anyone actually been fined using a 'de-cat pipe' on the street?

[br3ndan]

hey man,

some protection better then none right? That goes for more then just cat and de cat issue! haha

Ive been behind my friends turbo accord thats straight thru, and the shit that thing puts out is crazy.

Wasnt nearly as bad when he had his cat in it.

and its probably not as bad as speeding thru a school zone.. lol! i was just making a point!

But it does annoy me when people speed thru school zones.

[The Mafia]

here's 2 things that I know of that stop cats from working.

1. they usually die after about 40,000 kms.

2. If your car is running rich, they die.

[Johnny]

I hate the pet, im not gonna run one in my car.

Anyways i dont run one but then again i dont drive my car much (6months and 1000kms) how can we compare/contrast this to a person with a car that does 10,000kms per year and boots it all the time? I dont know the answer to this question it just came to mind!

[bozodos]

hmm i was just thinking, with the tune mine runs (very rich!), and the fact that it blows a big puff of fuel smoke when i boot it, i think my cat may already be dead

Oh and Spoolup, does your car make that power whilst still meeting all emissions requirments?

Edited September 8, 2008 by bozodos

[TiTAN]

Guilt-toy's car makes 374rwkw while meeting emissions requirements.

[DS-ZILR]

cats job is to heat up to arround 350 400 degrees as fast as it can so it can burn all the nastys before it comes out ya tailpipe. runnin a decat pipe is obviously lettin all that shit come straight out behind ya. I dont know about anyone else but anyone who wants to breathe anything that only burns at 400 degrees is welcome to, im not so keen.

also yeah if you run to rich and unburnt raw fuel hits your cat it starts to disintegrate the cat material, so crew who are running excessivley rich or have a rev limiter that makes ya car spit flames and all that you probably not goin to have a very efficient cat.

just some friendly info. i was more curious about power gains when i asked which is better but i know what i will do now.

cheers

[bozodos]

when i say does it meet emissions requirements, i mean like amounts of noxious gases as well, if he can pass that with 374rwkw thats a very respectable effort!

[GTS4WD]

de cat?

[R31Nismoid]

Guilt-toy's car makes 374rwkw while meeting emissions requirements.

Totally depends on what state your in.

Guilts setup wouldn’t pass in Vic in a million years

[joeyjoejoejuniorshabadoo]

His ecu is already an instant fail in vic...

a de-cat is a straight thru pipe that replaces your cat...