A Quick Exhaust Question

[08yannch]

hi every body

i am thinking of buying a cheep cat and hollowing it out and then welding in a pipe so that i dont get flow stagnation and so if i get pulled over and a cop checks under the car it will look like the cat is still there.

and i will keep the old one so i can put it back on if i have to go threw the pits.

what dose every body think

will i get more power?

has any body else done it?

[HEKT1K]

possible cop trouble, and heaps of black shit all over your car.. for a couple of kw? you gotta be kidding.

just buy a decent hi flow cat mate...

my 2c

[CRoNic...]

You mean... decat.

Flames, etc.

It's awesome. Don't listen to Greenpeace. Just do it.

And I have a cat on my GTR and I still get black shit all over my rear bumper... runs rich. You'll get black shit regardless if you have a cat or no cat.

Edited March 12, 2009 by CRoNic...

[08yannch]

thx CRoNic... for that explanation about black shit

i was thinking like what the f**k black shit why

i will see if i can pick a old cat for cheep probs next week

any ideas ?

i was thinking of checking the quokka and if that is a no go i will check out wreckers

[br3ndan]

possible cop trouble, and heaps of black shit all over your car.. for a couple of kw? you gotta be kidding.

just buy a decent hi flow cat mate...

my 2c

im with him on this case.

I hate it when cars dont have cats in them. They smell like shit.

I have a cat in mine and i can safely say i have no black shit @ all on my rear bumper.

All the cars ive seen with no cat or that is fitted with a decat does.

Do the right thing by ur car and get a hi flow.

[Kinks]

flow stagnation

sounds like some buzzword a mechanic threw at you.. a high flow cat won't cause any restriction in your exhaust.

[Luke_GTS-T]

whats a good hi flow cat to get? are cat co any good?

[Kinks]

yes, they're a good brand.

[D_C]

im using a cat and i still get black shit all over my bumper..

[CRoNic...]

Cat or no cat... if your car is running rich, you WILL get black 'shit' on your bumper.

[(OO)SKYLINE(OO)]

LOL!

Just go high flow cat.

[Messiah]

just to put some myths to bed regardings exhausts and cats etc etc. In all but extreme power uses there is no need for huge catless exhausts.

As gases cool they contract and as such the requirement for hight flow rates reduces. The times that cats do get hit by masses of flaming hot shit is normally when you close the throttle and rich spot travels down the exhaust. I think most people will agree that during lift off is one time when your really not going to give a crap about exhaust restrictions.

Just get a good high flow and inconjunction with a good exhaust and you'll be just fine.

[bozodos]

Just that if you're running a rich tune, it can cause the cat to become blocked and not work properly, which then isn't diagnosed until the exhaust starts leaking out of every possible little gap lol.

[Kinks]

Just that if you're running a rich tune, it can cause the cat to become blocked and not work properly, which then isn't diagnosed until the exhaust starts leaking out of every possible little gap lol.

So run a proper tune and recoup the cost of a cat and your tuners' time in a few weeks.

Honestly if you run rich enough to bugger a cat you are a f**king moron wasting fuel wasting power and wasting money! Get it tuned.

I had a friend with an EVO4 who ran so rich we used to get on the radio after he gave it a hit and go "thanks mate my fuel gauge just went up!". His engine needed a REBUILD 6 months later.