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Whos Jammed A 3inch Pipe Straight Through There Gutted Cat?

RaZ_TuRbO

By RaZ_TuRbO,
in Engines & Forced Induction

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Cubes Grand Master

Cubes

Posted
Posted

A straight through pipe doesn't really make it that much louder now drone in the cabin (unless the exhaust is prone to do so anyway) just a tad deeper and gruntier sounding.

A well setup exhaust shouldn't drone in the cabin full stop.

shonen Grand Master

shonen

Posted
Posted
A straight through pipe doesn't really make it that much louder now drone in the cabin (unless the exhaust is prone to do so anyway) just a tad deeper and gruntier sounding.

A well setup exhaust shouldn't drone in the cabin full stop.

agreed...my exhuast is pretty much a straight pipe from the cat back and it IS loud...but not drony and more than bearable on idle and low revs.

WazR32GTSt Grand Master

WazR32GTSt

Posted
Posted
How about you just do the right thing and buy a new cat...

Think of the environment.

Think of the cancer growing in your lungs from breathing in your un-catalysed exhaust gasses.

Is it worth it all just for gaining a few kW?

those kind of emmissions won't cause lung cancer... not in short-term exposure anyway

lung disease, yes (eg lung fibrosis)

you'd have to be breathing in funes everyday for years to be at risk there

honestly, i did this to my car before i got a high-flow cat and i noticed no increase in exhaust note, and no difference in power at all!

so it begs the question, why bother?

mr_rbman Grand Master

mr_rbman

Posted
Posted
A straight through pipe doesn't really make it that much louder now drone in the cabin (unless the exhaust is prone to do so anyway) just a tad deeper and gruntier sounding.

A well setup exhaust shouldn't drone in the cabin full stop.

mine mustn't be setup too well then. hehe!

BAMR33 Mentor

BAMR33

Posted
Posted

Going back to the original question why would you go to all the effort of putting a straight pipe through the cat? its pointless, if a cop pulls you over its usually due to the smell or noise and then they'll send you to the transport department. There are performance gains from a straight through pipe, but its not worth it on your daily driver.

letemlaf Rising Star

letemlaf

Posted
Posted

My car has a decent high flow cat but since i installed a power fc and had it tuned it is running quiet rich and i always get pops through my exhaust, sometimes very loud ones. will this destroy my cat pretty quickly?

johnGTS-t Collaborator

johnGTS-t

Posted
Posted (edited)
yeh they might look like a cat but if ya blowing flames out the exhaust they might be a bit suss about that

ive have a stock r32 im running on the track. ive gutted the cat and taken the rear muffler off. will i blow flames?? if so, cool!!!

and will i notice much difference without it? i havent tried it yet, have to wait till next weekend.

i will have a 3'' system on it by feb next year but for now its honkin ok.

Edited by johnGTS-t
NickR33 Grand Master

NickR33

Posted
Posted

there is almost no difference between a 'highflow' cat and a straight through pipe in terms of performance...

I know because the 2 bolts holding my cat to the front pipe came out last week and I was driving around for a few days with no muffling of any kind... the noise was deafening and sounded like crap below 3000rpm... I was even turning the ignition off at light because I was so ashamed...

now its fixed the performance difference is hardly noticable and that is with a cat, resonator and muffler bolted back on... so just get a proper cat and do everyone a favour

-_-StRyDeR-_- Experienced

-_-StRyDeR-_-

Posted
Posted

kinda sounds like you were going to gut your cat no matter what these guys have said? :S

the gutted cats iv heard sound hollow n a bad sound as if they have big exhuast leaks...

CJ

ps, i must be a lazy cu*t, i sit in maccas drivethrough for 1hr!! (yeh right)

Ive got a black car so it won't look that different. It will fit you just have to cut the cat housing a bit. As for cancer and contributing to the death of the environment.. you guys are funny.

I think it evens out for me acually, i ride to work and catch the train to uni so i only drive my rig on the weekends which is alot better for the environment. The lazy cu*ts who drive everywhere and would rather sit for 1hr in macas drive through than walk into the place and be in and out in 5 mins are the ones you guys should be angry at.

cheers.

  • 3 weeks later...

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