Need opinion on exhaust modifications

[Limws1]

I am driving Accent 1.5 manual. I don't really have a choice for the cat when changing to

4-2-1. It's either extractor with no cat, or with cat but no extractor.

[Hkfung]

sounds like yr stock extractor are joined with cat design ? the workshop should be able to recommend the correct setup. those workshops should be fine

[Limws1]

Yup, the stock cat is joined to the stock extractor.

[Hkfung]

after changing to hotbit ext, just fix a straight pipe and when inspection comes, go fix a normal cat

[Modeldriver]

Just curious - U tok to who ? Fong Kim and Jeep Chee ?

 

Anyway, Fong Kim told me that de-meowing will help in the low to mid-range, while doing muffler job will help at high end. However, am told that if exhaust is improved, need to look at intake system too. As to the yearly inspection, it also depends on car - am also told that usually ECU with lambda sensors etc would adjust depending on flow and would make adjustments. While there may be a smell, may not fail emissions test either - so long as engine is efficient in more complete burn. Believe the test is more for CO (carbon monoxide) which is more harmful.

[Modeldriver]

Actually, U could even be more adventurous and try to go for twin exhaust if you are already into changing the extractor, cat and muffler already.

[Limws1]

> Actually, U could even be more adventurous and try to go for twin exhaust if you are

> already into changing the extractor, cat and muffler already.

 

That would definitely attract lots of white ants wouldn't it?

[Modeldriver]

goes w/o saying... then depends on whether or not there's a 'legal' version for you, if so,keep the LTA approval handy in the car

[Turbobrick]

When remove Cat, there will be some slighty smell from exhaust. But most important of all, you might fail the CO2 test when you go for inspection.

 

Removing cat won't fail CO2 test as the cat filters more NOx and other nasty stuff rather than CO2...honestly the test equipment used are really out of date, in california they test for almost every chemical known to come out of the exhaust

[Gadgeter]

Is it? Hmmmmm.... Then I shall not worry about it anymore..

[Turbobrick]

Only thing to be concerned with is the actual cat-shaped muffler that they may look out for

[Turtlekar]

I am driving Accent 1.5 manual. I don't really have a choice for the cat when changing to

4-2-1. It's either extractor with no cat, or with cat but no extractor.

 

bro, what plan have u got in your mind? if u are looking for more freeflow....u have to ensure the diameter of the new extractor did not alter much of it air flow....too much back pressure is good for low end, but will lose out on the high end....too little is the reverse.....by removing the cat will enhance your flow better....having operation on the muffler side also sounds good but it has to be done professionally or else u get nothin out of it overall, the important thing is the diameter of the piping....u can check it out with saaber....he's an expert

[Gadgeter]

Thanks for the pointer..

[Frisk]

Kel, the "meow" will be useless after unused for 3-4 months

[Gadgeter]

is it... ..

 

Time to sell mine..

[Bobo]

how come the "MEOW" will be useless after not used for few month?

 

got self distruck device? how much is a brand new cat then?

 

thanks

[Gadgeter]

Think... if dun use for few months, the 'meow' will turn rusty..

 

Am not sure about new cat... yet to buy..

[Saaber]

If kept properly, it is OK...