catalytic converter

clawhammer

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Some cars have more than one. Normally it's after the extractor.
 

whatdamn

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the catalytic converter is a 'filter' so that harmful waste gasses such as NOx and CO are all catalysed to convert into other less harmful chemical molecules. even unburnt hydrocarbons are converted into other less harmful forms.

most carb cars do not have the cat-con or should i say older models like the datsun 120Ys and such. it's usually after the header. umm, most cars have only one, it's rather expensive to purchase one. the one after the cat-con is usually the mid-box/bullet or whatever it's called, which is used to dampen the resonance from the exhaust system.

if i'm wrong anywhere pls do correct me. don't like giving out wrong info :)
 

thteh86

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it is the oem centre muffler or wat u call that the centre box which is the "liability" when it comes to performance. But it helps to reduce acid rains which is caused by the SO(sulphur monoxide).

it's located in the middle of your exhaust system, it also helps to reduce noise polution. It contains either platinum or another thing which i forgotten the name of it. The thing inside is actually the calalyst for the process to convert the poisonous CO to CO2, or so on. Platinum is very expensive though therefore they use the other thing to act as the catalyst. ;)
 

2pac

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guys.. if we remove the cat converter, does it increase the sound of the muffler or any 'pecah' sound ah???
 

Kchai

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i've removed mine after i installed powerzone extractor...well, its pretty noisy at 4000 rpm..and it creates a weird sound when u press the throttle... i wonder did u guys experience this before?
 

L9Turbo

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For most k-cars.. its together with the extractor.
 

prodigy

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i've just removed mine. i've drove stock cars all my life and i'm starting to get used to that hissing sound everytime i press the throttle. its not very noisy after removing the cat-con but i just need to get used to that hissing sound.

also, the slight increase in power is felt after 3000RPM. that works in my car but i specifically told the exhaust shop i wanted low end power instead my car accelerates a lil faster at high RPM. btw, i also got an extractor. truthfully, the power increase is marginal with the 2 mods i did. but u can feel the engine revs a little easier thats all.
 

Joeker

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There should not be any hissing sound after removing the cat unless your piping or flange has sprung a leak
 

SyXt3m

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THe car converter acts as some gay thing to reduce air pollution...I have removed mine and added a bullet.. You have 2 choices either add a straigh pipe or a bullet to increase a bit hp...
Just sharing my itsy bitsy small knowledge :D
 

2pac

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Originally posted by SyXt3m@Jan 25 2005, 22:07
THe car converter acts as some gay thing to reduce air pollution...I have removed mine and added a bullet.. You have 2 choices either add a straigh pipe or a bullet to increase a bit hp...
Just sharing my itsy bitsy small knowledge :D
if let say i use back my original pipping but just remove the cat converter is it ok. I dont add bullet but just sambung pipe at the place where i cut the cat converter. Is tis recommended?
 

sam1741

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haih...
me always very confused...

to remove it.. to feel a tiny bit increasing of power

or to maintain it
so our environment is less polluted...
 

SyXt3m

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ACtually if you want a pipe instead of the bullet , its possible.. Its cheaper but u gotta know about your current exhaust..If you are using stock exhaust system say like my satria oem system....the air flow from the pipes will be very strong because instead of going tru the cat, the air will only go tru a normal pipe which allows total air flow and it will make a "unpleasent" sound instead of vrooom will go preakkkkkkk...HAaha u can use back ur original pipes
 

2pac

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Originally posted by SyXt3m@Jan 26 2005, 17:16
ACtually if you want a pipe instead of the bullet , its possible.. Its cheaper but u gotta know about your current exhaust..If you are using stock exhaust system say like my satria oem system....the air flow from the pipes will be very strong because instead of going tru the cat, the air will only go tru a normal pipe which allows total air flow and it will make a "unpleasent" sound instead of vrooom will go preakkkkkkk...HAaha u can use back ur original pipes
wah!!! if got that preakkk sound.. then i dun wan lah...
i wan something very bassy sound rather than the preaaakkk sound...
thanks bro
 

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