What size exhaust is good for R33 GTST

[nizmokid]

I am looking at making a madural bent exhaust for my R33 from the turbo back and gut out the cat with a straight through pipe for more power, will anything bigger give me turbo lag or loss of back presure in the car.

Nizmokid

[AndyMac]

i think merli said it before...but is there any point to gutting a cat for 3 or 5 extra Kw's? over the cost of health and the environment ??????

3inch from turbo to high flow cat, 31/4 cat back. Lag shouldn't be a problem.

[Morgs]

It is something like a five figure fine for having a gutted cat? or is that just an old wives tale?

[nizmokid]

We don't have roadside checks on cars in my state? so I can do this not a problem hehehehehehe.......

nizmokid

[KamikazeR33]

a high flow cat should give u the same power as a gutted one or none at all

[torana_mad]

If you think you can get away without putting one on (or want to chance it) then why pay $$$$ for one.(though i dont see the point in it to get one only to gut)

Aslo if your the type to worry about the environment then dont drive or even sell the car and buy a push bike.

Ash.

[dojobi]

Originally posted by torana_mad

If you think you can get away without putting one on (or want to chance it) then why pay $$$$ for one.(though i dont see the point in it to get one only to gut)

Aslo if your the type to worry about the environment then dont drive or even sell the car and buy a push bike.

Ash.

So everyone that owns a car and doesn't care about the environment should have no cat then? I feel that we should at least try and prevent as much environmental damage as we can, and if that means using a cat, then we should do it. Choosing to run without a cat for a few kws is just not right in my eyes.

[AndyMac]

Well said, Well said.

Is that YOUR Mullet ? Heard of Nazxul ?

[dojobi]

haha no it is not my mullet. I saw the pic somewhere on the net and at first sight I just knew it had to be my avatar

[GTR-80Y]

If your gettin a full exhaust system then its gonna only be as good as the most restrictive part...that being the cat. Those barstards suck power! Worry about the environment?? kekeke:lol: Plant a tree and make up for it!:bahaha:

[MYGTST]

im selling my 3" cat replacement pipe

for those who want the power

or who want that little extra for race days

[PranK]

Originally posted by KamikazeR33

a high flow cat should give u the same power as a gutted one or none at all

i was using a straight through pipe for a bit on the '33, when i got a 4" high flow cat i didn't notice any difference in power output.... and people driving behind me weren't passing out. :)

[AndyMac]

I tried to post this at TAFE, but the computer screwed up. And a few people have already posted...

BUT. What I wanted to write at the time...

I think the attitude really really sucks on this. I wouldn't count me as a Greenie at all.

The removal of a cat is just plain stupid, and isn't going to be doing any of us any favours. The modified car scene is already tainted as it is without giving the local powers that be another reason to crack down on us.....All for a few kilowatts of power which I bet you couldn't even notice.

The cat, sa far as I understand, is there in an effort to change the raw exhaust gas to something which is alittle less harsh and can fliter back into the air as cleanly as possible. Tell me, how offen have you been pissed off with a car in front spewing rotten gas onto you and your car ? Why join them.....

If your off to the racetrack, yeah sure fit the pipe to bypass the cat...But for street use, when the car is going to burn most of its fuel.....I can't see a cuase for not having a cat....geezz you can even get high flow cats!!!

........That was my ramble..

NO CAT=DUMB.

ANDREW

[whatsisname]

It's one thing to go on about the stupidity of running without a catalytic converter, but how often does the average Joe check or replace a tired cat'?

Under ADR 37-00 your cat' is required to last 80,000km or 5yrs, whichever occurs first! How many cars on the roads in OZ would've had a cat' (or cat's) changed in their lifetime? Unless it’s totally stuffed & the honeycomb has collapsed into small bits you’d probably never know it wasn’t doing its job, unless the smell becomes MORE noticeable.

It’s my guess that apart from the performance automotive market & the EPA nobody else really thinks a hoot about the condition of their cat'!

An ineffective or blocked/damaged cat' is about as good as no cat' at all, worse in fact, 'cause it's not doing much for the environment OR the engine!.

My 2.2c

Note: NZ’ers aren’t legally required to run a cat’, so watch out on the East Coast when the wind’s really strong from that direction

[matlowth]

You're right on the money there mate... Any car with more than 5 years on the clock is more than likely going to have a cat that isn't very effective at blocking all the noxious gasses coming out the back of their cars...

How many people do you know that actually change em? My last car was a camira with 200,000kms on it, still running the original cat! Tell me that wouldn't have been stuffed!

matt

Originally posted by whatsisname

It's one thing to go on about the stupidity of running without a catalytic converter, but how often does the average Joe check or replace a tired cat'?

Under ADR 37-00 your cat' is required to last 80,000km or 5yrs, whichever occurs first!     How many cars on the roads in OZ would've had a cat' (or cat's) changed in their lifetime?  Unless it’s totally stuffed & the honeycomb has collapsed into small bits you’d probably never know it wasn’t doing its job, unless the smell becomes MORE noticeable.

It’s my guess that apart from the performance automotive market & the EPA nobody else really thinks a hoot about the condition of their cat'!

An ineffective or blocked/damaged cat' is about as good as no cat' at all, worse in fact, 'cause it's not doing much for the environment OR the engine!.

My 2.2c

Note: NZ’ers aren’t legally required to run a cat’, so watch out on the East Coast when the wind’s really strong from that direction

[GTR-80Y]

Andrew: YOUR A DIRTY GREENY!

Have u seen the internal matrix of a cat? In essence it makes the exhaust gas cover a surface area of a football field! That can't be helping performance!

To protect the environment form all the non-cat people of the world i shall smoke one less cigarette a day!

werd, peace, respekt, out!,

Cheers,

Captain Planet!