how much gain from a decat pipe?

Akys · Post by **Akys** » Mon Nov 28, 2011 6:24 pm

Thinking about decating the system.( i know its illegal) Would like to use the cat housing and punch out the cat.

questions are, how much gain am i looking at? was reading some articles online and some say they can feel a bit of difference some say its not noticeable.
will it affect back pressure or the O2 sensor?(i think FTO O2 sensor is in front of the cat right?

Was thinking about running a pipe inside the cat housing.

anyone driving around with a decat in nsw?

Post by **aza013** » Mon Nov 28, 2011 6:41 pm

Akys wrote:Thinking about decating the system.( i know its illegal) Would like to use the cat housing and punch out the cat.

questions are, how much gain am i looking at? was reading some articles online and some say they can feel a bit of difference some say its not noticeable.
will it affect back pressure or the O2 sensor?(i think FTO O2 sensor is in front of the cat right?

Was thinking about running a pipe inside the cat housing.

anyone driving around with a decat in nsw?

Ok well 1st:- gain of 10kws top end
Back pressure affected = no
O2 sensor affected = no
O2 sensor in front of the cat = yes
Street use

Track only and dyno days

Any thing more than that and you play a time game to see when you will get done for it.

Kustom · Post by **Kustom** » Mon Nov 28, 2011 7:06 pm

Just punch it out incase you get defected. If you put a pipe through it... its very obvious lol.

Akys · Post by **Akys** » Mon Nov 28, 2011 7:45 pm

maybe i should get a used cat and try it out first. haha

Post by **aza013** » Mon Nov 28, 2011 7:54 pm

high flow cat no track cat yes.

Kustom · Post by **Kustom** » Mon Nov 28, 2011 8:05 pm

Kustom wrote:Just punch it out incase you get defected. If you put a pipe through it... its very obvious lol.

silverGPX · Post by **silverGPX** » Mon Nov 28, 2011 9:25 pm

it doesnt do much. maybe rev a bit cleaner?

zuihoujueding · Post by **zuihoujueding** » Mon Nov 28, 2011 10:47 pm

Think it's the increase in noise level more than anything else?

Taz · Post by **Taz** » Mon Nov 28, 2011 10:50 pm

There was a few interesting vids in which Tarzan tested out his rivals car decating on a dyno.
In a top car like that they managed to get an extra like 4kw i think it was out of the car - which was tuned to run without it so i doubt there will be any noticeable effect if any just swapping it out like that

zuihoujueding wrote:Think it's the increase in noise level more than anything else?

Second - and the much unwanted cop bait increase

gpx000 · Post by **gpx000** » Mon Nov 28, 2011 10:58 pm

my friend d cat his car.. stinks!! haha i was like why not just buy a new exhaust system.. youre going to pay 83217482374 times more for the fine lol.

just get an exhaust system done, save the trouble. it seriously smells lol i cant stand it

Akys · Post by **Akys** » Tue Nov 29, 2011 2:14 am

Already got my exhaust done. Just thinking about way to get more out of it. Thanks guys, i think i'll stick to having a cat to save all the trouble.

but i am still gonna get my resonator out and see if theres any different.

Chiinkstarrh · Post by **Chiinkstarrh** » Tue Nov 29, 2011 2:57 am

i was thinking about decating the mr2 , apparently for the 00-02 mr2 engines it sucks all the sh*t into the engine then fcks up the pistons, still wondering what other ways to do it in the legal ways,
sorry for hijackin the thread

Post by **Bennoz** » Tue Nov 29, 2011 8:42 am

Come round & I'll take you for a run in my mrs FTO

Post by **aza013** » Tue Nov 29, 2011 8:50 am

Well I will say again 10kws top end dyno tested!
Same day same dyno.

BearOnFire · Post by **BearOnFire** » Tue Nov 29, 2011 10:32 am

Removing all the resonator will give a growl that make VTEC YO!!!!! YO!!! blush with envy

FTO-BOY · Post by **FTO-BOY** » Tue Nov 29, 2011 4:09 pm

Been driving with a decat for about 2yrs and cops still don't pay attention.

Kustom · Post by **Kustom** » Tue Nov 29, 2011 4:25 pm

I would punch my cat if it didn't throw a cel -.-

Akys · Post by **Akys** » Tue Nov 29, 2011 6:50 pm

anyone has a used cat? 2.5 inch. would like to try it out and keep my high flow cat so i can swap over whenever.

bass_twitch · Post by **bass_twitch** » Tue Nov 29, 2011 7:07 pm

Akys wrote:anyone has a used cat? 2.5 inch. would like to try it out and keep my high flow cat so i can swap over whenever.

I'll swap you my used stock cat for your high flow one

Gholdwayne · Post by **Gholdwayne** » Thu Dec 01, 2011 4:28 pm

bass_twitch wrote:
Akys wrote:anyone has a used cat? 2.5 inch. would like to try it out and keep my high flow cat so i can swap over whenever.
I'll swap you my used stock cat for your high flow one

I like that

smooth Brendon

FTO AUSTRALIA