Cat Vs Pipe

[fragz013]

hey guys, i get this yellow stain on back of my line that u talk of, comes off fairly easy with turtle wax, any way i bought the car about 6 months ago, the seller never mentioned anything about no cat. Just wondering wats the easiest way to tell if its been fiddled with? cheers.

[R31Nismoid]

tap it with a screw driver.

sounds hollow, then it is

[axelmasok]

Finally after a day searching here I found what I was looking for. The guttered cat question. I have the factory exhaust on my GTSt and it has enough Kms on it to safely say the cat doesn't do anything usefull anymore. It's high time I replaced the lot with something more 3" ish. I am travelling OS soon so won't be shelling out money yet. Was keen on bashing out the guts of the cat in the meantime for some more hp and better milage. Not too concerned about RTA/EPA/COPS (Although the TRA did pay a "routine" visit a little while ago..), my car doesn't draw attention like some others. $10k is worst case senario and they really have it in for you. I know someone at the EPA and they like targeting repeat offenders more. My question is: are they easy to bash the guts out of? Much steel and other bits that will make this operation a problem?

[grim32]

Easy as, just belt it a couple of times with a jack handle or metal pole.

[BreathLess]

there no point not having one as their one or two hp difference between a hi-flow cat and no cat.

[2BNVS]

must be lucky with mine, i have a hi flow cat which is gutted and no resonator or anythin, only have a straight thru rear muffler, cars well tuned and i dont get much smoke if any ahtough i get flames at hi rpm back offs and shifting up, pretty nice, felt a bit more free once the cat was gutted cant remember exactly thought the full gain, roughly 10rwhp i think maybe bit more, it went from 472rwhp to 485rwhp. and from under neath just looks like a normal cat

ben...

[Busky2k]

So you gained <3%. Not much really.

[MADGT4]

Guys that whole not having a cat = $10,000 fine is a load of crap.

When i bought my 32 and didn't know too much i got defected and had to take it to Regency.......

So the car is on the hoist and the inspector goes "see that"?

i say "see what"?

"exactly" he replies "there should be a cat there"

Just said i will need one to pass, and that was it, nothing else was said!

No mention of a fine no nothing.

PS. I love having no cat!

Edited February 19, 2006 by MADGT4

[axelmasok]

Guys that whole not having a cat = $10,000 fine is a load of crap.

<{POST_SNAPBACK}>

Agreed. I think you might be the best case scenario, differnt states differ of course but still good news.

I will speak to my EPA friend in NSW and give you guys "from the horses mouth" facts on what usually happens in this regard.

As for my cat, I'll take to it with a hammer and pipe in the meantime until I replace the whole exhaust system. I will get a high flow cat no doubt, I beleive they work well. Not sure on dump/cat/muff combo yet, have to surf around and get some advice of you guys. Mild steel likely, I don't think I'll have it long enough to warrant SSteel.

[bigcarl]

go a 4inch magic cat.

[ctjet]

just buy some peice of shit cat, smash the honeycomb out and use that... if u get done with it just swap it over with the good one

been doing that for ages

[RRR32_GoDzIlLa]

when i bought my car it didnt have a cat. not a cat with a pipe thru it, just a pipe. i havent bothered changing it, if a cop says wheres the cat, i'll just say what's a cat. Surely they can't give me a fine if i bought it like that and say i don't know what one is??? can they??

[JeeTeeEss25Tee]

And that apply to all whatever other mods as well?

[DivHunter]

The $10k fine is for a workshop that puts a catless system on a car isn't it?

[Robo's]

No, the $10k is fine is for the owner driving a catless car. If you can get the workshop to foot the bill , then your doing well

[gtr660hp]

Why no cat anyway??

what sort of mods/horsepower you got

Mine went 354awkw with cat (3.5in metal cat)and 361awkw without cat

So for 7kw (in a 350awkw car) who cares just put it in

[markimak]

when i bought my car it didnt have a cat. not a cat with a pipe thru it, just a pipe. i havent bothered changing it, if a cop says wheres the cat, i'll just say what's a cat. Surely they can't give me a fine if i bought it like that and say i don't know what one is??? can they??

<{POST_SNAPBACK}>

speaking of punchin cats.. i planned to do mine tomorrow. 90kms on a GTR runnign rich just clogs it up.. :lol: turbo cars will clog cats up in a matter of years.. if u can afford a cat buy it.. the straight out emissions produced by an engine is extremly harmful..

hehe ..

Cop: defect time.. ok son whats that hanging off the block?

" i dnt knw wat it is ?"

Cop: looks like a T4 T70 and external wastegate?

"what u talkin bout thats standard.."

CAT CONVERTERS SAVE LIVES..

[Guest Mashrock]

Guys that whole not having a cat = $10,000 fine is a load of crap.

When i bought my 32 and didn't know too much i got defected and had to take it to Regency.......

So the car is on the hoist and the inspector goes "see that"?

i say "see what"?

"exactly" he replies "there should be a cat there"

Just said i will need one to pass, and that was it, nothing else was said!

No mention of a fine no nothing.

PS. I love having no cat!

haha likewise with me,

still hasnt had a cat on it. but there are like 3 massive mufflers under there so it isnt really a loud car to begin with so i doubt the exhaust will ever be checked.

p.s. loves having a high flow veilside exhaust.

Why no cat anyway??

what sort of mods/horsepower you got

Mine went 354awkw with cat (3.5in metal cat)and 361awkw without cat

So for 7kw (in a 350awkw car) who cares just put it in

tho also going to get west side put one of them 3.5 inch metal cats on.. just incase.. then for the track its nothing but a small sidepipe for maxium noise and flow

[axelmasok]

speaking of punchin cats.. i planned to do mine tomorrow. 90kms on a GTR runnign rich just clogs it up.. :lol: turbo cars will clog cats up in a matter of years.. if u can afford a cat buy it.. the straight out emissions produced by an engine is extremly harmful..

We considering a cat should be replaced every 40,000Km (don't quote me) do a quick calc on how many cars are running with cats that don't work? Let just say a few. How about bikes? Not too many cats on them nowdays, I can tell you mine doesn't have one nor does it require one. Not to mention leaded cars running PULP and fuel additives...hmmm can you smell the roses? I don't feel bad about it, I drive the car twice a week.

I will get a high flow cat anyway guys, no need to talk me into it. I'll try find a good value split dump pipe, high flow cat and a reasonable sized muffler (no cannons please) with some 3" to join the dots. Local exhaust place quoted me $1000 for his half baked system - no thanks. Any recommended exhaust place who will listen to what I want and not rip me? Someone said Liverpool Exhaust (NSW)... hard to tell if you guys recommend people/shops or put in a good word for your cousin's business...

News on the $10,000 question on the way.

[nF]

if you run a bit rich no cat will be a dead giveaway to any cop who has a sense of smell

also the clouds of smoke and flames