modify exhaust suggestion

[markii]

i plan to modify my exhaust system and wish to get some of your opinions and suggestions. my car produces around 200hp and its an NA. i plan to change the piping to a larger diameter but i have heard people say it will affect my cars acceleration. so now what i have in mind is just replacing the cat and join it up with piping. will it be noisy?? btw how much does it cost to do this?im on a budget of rm500. tq

-edit-
it has an auto transmission btw

 

[nitrus]

i plan to modify my exhaust system and wish to get some of your opinions and suggestions. my car produces around 200hp and its an NA. i plan to change the piping to a larger diameter but i have heard people say it will affect my cars acceleration. so now what i have in mind is just replacing the cat and join it up with piping. will it be noisy?? btw how much does it cost to do this?im on a budget of rm500. tq

-edit-
it has an auto transmission btw

theres difference wid changin the piping to larger BUT suitable diameter, and changing to larger but WRONG diameter .. changin to larger but suitable diameter piping shudnt affect ur car acceleration on d bad side..

for ur car, N/A, 200hp range should go for 2 - 2.25" diameter..

a CATalyst converter should reduce sound, so depends on ur overall exhaust system, the CAT / piping shudn't make it noisy, unless u get a sports/street muffler..

the price varies depending on where u go... But i dun suggest go Wei Yip or those single exhaust shops la... u wanna get a CAT, get a good one n u wun complain after installing hahhaa..
try Hot Bits @ Speedworks.. or ZENDEN from kent20 @ ZTH's Marketplace
RM500 shud be enough? maybe slightly more... do survey around la bro, take ur time..

u can read more on exhaust system etc. here..
http://www.zerotohundred.com/newforums/showthread.php?t=34978

:regular_smile:

 

[markii]

if u suggest i go for 2-2.5" its better off leaving it alone because stock is around that size i think. another thing is i have no intentions of replacing my CAT as i know it is just another restriction. so, what i have in mind now is just removing the CAT and weld a piping in place to join(even better, i save a lot of money..heheh). i just need some clarification of the noise level after i remove the cat as i dont want to be chased by the cops or jpj.

 

[nitrus]

u said..

so now what i have in mind is just replacing the cat

n u said..

if u suggest i go for 2-2.5" its better off leaving it alone because stock is around that size i think. another thing is i have no intentions of replacing my CAT as i know it is just another restriction. so, what i have in mind now is just removing the CAT and weld a piping in place to join(even better, i save a lot of money..heheh). i just need some clarification of the noise level after i remove the cat as i dont want to be chased by the cops or jpj.

ur two posts varies in explaination... maybe u havent made up ur mind? heheh..

noise level shud be ok la. Unless ur muffler is dunno wat CapAyam Super-Bising Muffler..
but i think u already violated some dunno wat exhaust emmision ruling ady if u remove the CAT totally .. not sure bout that. good luck.

 

[BLaCkHoWLiNG]

it'll be better if u could state the model and make of yr car. and engine capacity as well...

 

[markii]

nitrus, sorry.dono what was i thinking. what i mean is i want to remove the cat and join the piping back without any bullet or new cat.

blackhowling, toyota mark ii jzx90(A)
engine capasity: 2500cc

 

[dean75]

Whooaa...monster liao.....

 

[markii]

hmmm monster? well quite true...but the exhaust system is too restrictive thats why asking around for good exhaust setup....heheh

 

[nitrus]

markii .. r u sure ur current piping is 2.25" ?
wat other mods u did ?

actually if i were u i would consider changing the piping instead, depending on ur mods .. I dun know which smart person starting the "remove the CAT" thing .. but seriously, it will help wid the flow ke..?

wen i told my fren who is studyin automotive engineering in overseas , he like abit skeptical when he came back ere n we chat bout car mods back here in malaysia... like removing the CAT .. turbo jet, microcompressor , magic jet..

hahahaaa.. all i can say is .. "malaysians are capable of anything..." :lol:

 

[BLaCkHoWLiNG]

dude, 500 is not enuff for a mark II...

u need a 3" S-Flow muffler, and 2 center boxes... pref 1 S-Flow.. dat'll be great...

 

[smalldidi]

hi there, just wondering ,can i purchased those muffler that post in marhet place expcially from japan brand n put on my auto's car? i mean i just wan more fast response ..mind to share?

 

[markii]

hmmm killing the cat should give better flow i guess since i never changed it for years. after years of use im sure its clogged with dirt by now

 

[nitrus]

dirt .. ? how come there's dirt in the CAT ? u dun drive with an air filter? :hmmmm2:

 

[markii]

the catalytic converter will get clogged with dirt and dust after a while right?

 

[BLaCkHoWLiNG]

remove the CAT....

 

[fstr]

then cum to jian hang :p

 

[rinagi]

i plan to modify my exhaust system and wish to get some of your opinions and suggestions. my car produces around 200hp and its an NA. i plan to change the piping to a larger diameter but i have heard people say it will affect my cars acceleration. so now what i have in mind is just replacing the cat and join it up with piping. will it be noisy?? btw how much does it cost to do this?im on a budget of rm500. tq

-edit-
it has an auto transmission btw

i replaced my auto altezza's cat and joined up with piping. guess wat happens? whenever i tap to the gas pedal, i need to wait around 2 sec in order move. bad reaction. this is due to high compression engine like my 3s-ge engine needs a cat to give pressure. one more thing when u change cat make sure they open off ur o2 sensors before they do it. mine is damaged by JFA boys n the pair of o2 sensors cost me around rm1200/pair. so, make up ur mind. that's the worst case scenario of mine

 

[nitrus]

meow..

 

[weige]

i plan to modify my exhaust system on my daihatsu move 660cc and wish to get some of your opinions and suggestions.

 

[silent_driver]

is it worth it to change the exhaust when u r planning(not sure yet) to change engine next year? can the same exhaust component be used back in the new engine?