Cheap Hi-Flow Cat

[predator]

lifespan of a cat is about 5 years, after that they become useless.. and can actually impede flow.

Sure, they might *look* fine, but the honeycomb material is involved in a chemical reaction in converting the CO (and whatever other chemicals it is engineered to attract).. once its spent, no more cat reaction = cat useless..

[The Dan]

yeah, so then you come to me and say "hey Dan, can you buy me one of those super dooper cat's from your work for $170?"

And I say sure...no problems.

You could go the ultra high flow cats which are now available. They are around $240 and flow an extra 40% or so. They are a much larger body though so you have to be aware of space for it.

[666DAN]

"hey Dan, can you buy me one of those super dooper cat's from your work for $170?"

Don't say this to me though cause I'll just get confused and insist there is no decent pu55y here...especially for $170!

[SmoothLine]

You forgot Step 6. Get pulled over by transport inspectors who tell you your cat is hollow because of the poisonous gases bellowing out the back

and Step 7. Get fined up to $5000 depending on how 'aware' you were that it was hollow.

If you have the cat casing still on, but just hollow, you can only be fined for emissions...

I know a guy with a hollowed cat, you cant see the gasses coming out, it has to be taken to an inspection station for a test to concluded that, even then see above.

and the fine is on a per cylinder basis AFAIK.

for a uselesspost.

Back on topic: The gain from a highflow cat would be VERY minimal maybe 3rwkw max...

[The Dan]

haha. They can actually do a gas analysis on the side of the road. And with one of those, you can tell if there is no material in the cat. Your Nitrous Oxides would be through the roof. And as for that, once they find that your cat is hollow....coz any idiot can tell the difference with an analyser, you get a machinery and they fine you. The fine is up to $5000 depending on your involvement.

Thankyou for wasting my time for having to explain it.

[NismoGirl]

I know someone who got pulled over and only defected for not having a cat and all they had to do was get a new one put in to clear the defect.

No fine, no points, no money.

[GOR33]

is it bad if you have a full 3 inch exhaust but still have a stock cat?

[BelGarion]

put your hands around your neck and squeeze tight, now try and breath out....

same thing in your exhaust, you totally have defeated the purpose to having a highflowing exhaust, especially if you have the original cat which is more than likley blocked having had a high fuel load dumped into it over the years as well as heat which is associated with running more boost.

mine the front side of it melted and was practicly completly blocked when i last replaced it.

[GOR33]

yeh im gona change it, ive just got a cat back at the mo, but im buying a front and dump pipe but have no cat yet, maybe ill wait till i get a cat b4 i install it all

[strutto]

Back on topic: The gain from a highflow cat would be VERY minimal maybe 3rwkw max...

Depends on the current power level IMO...

[BelGarion]

also if your planning on gutting a cat just bear in mind that the contents of the honeycomb is reportedly carsonogenic (sp?) (that said you can get cancer from scratching your armpit these days so why worry eh?)

i got my replacement cat from batmbl as well, he was very good to deal with.

[BelGarion]

as gordon said before, after 5 or so years they are useless, the fronts become melted and blocked and the honeycomb is no longer effective, replacing it with something capable of flowing more and converting more gas is a much better investment than replacing it with another stocker

[bretto]

just curious has anyone actually been fined for not having a cat? you say its $5000 but ive never heard of anyone getting this fine before?

[Tigger]

Im not exactly sure what size my cat-back exhaust is... the previous owner told me the spec of it but i forgot... what i do remember is that its bigger than 3 inches... its either 3.25" or 3.5"...

Now the question is, will have to find a cat with the same size ends? Or will standarad 3" hiflow cat do the job? I just dont wanna end up buying a cat that doesnt fit, or even worse, going to a muffler joint to get them to measure it and find out after paying them $$$ that it would have fitted!

The intuitive response would be that the same size cat would be required but im asking bcoz currently with the cat back exhaust, the bigger exhaust pipe is attached to the smaller stock cat... If you get what i mean...

Also, is it possible to put your car up on a jack and replace the cat yourself with some backyard tools? Is it a complicated process?

Anyway, any help much appreciated!

[Tigger]

As you can no doubt tell from my above post... im quite low on funds at the moment (tightass) and would save money where possible