Replacing cat with higher flowing part.

**Z2TT** · 15-10-2008, 03:54 AM

I asked to do that but they didn't let me, they thought there was something suss with me.

**oldcorollas** · 15-10-2008, 03:56 AM

don't you have any picck-a-parts over in the west?
you can't just wander aroudn the yard looking for stuff?

**PlacentaJuan** · 15-10-2008, 04:49 AM

Originally Posted by Z2TT

I asked to do that but they didn't let me, they thought there was something suss with me.

did you do one of your burnouts out the front before you went in?

i fucking riffked but why cant you say you need a cat and want to get one that fits?

ariso has a pretty big cat and its easy to weld new flanges onto it also

**Z2TT** · 15-10-2008, 05:32 PM

What burnout?

By ariso do you mean Aristo?
If I remember correctly they either had a 2jz or 1uz, would you know which engine this was off? I'd believe it would be the 2jz-gte

Are the dimensions of the catalytic converter and the inlet diameters the only factors that I should consider. Would the Internals of the cat affect flow and differ from one another? Example 2 cats same dimensions and Inlets that have different designed internals that would affect flow, or are most cats the same Internally?

Thanks.

**BigWorm** · 15-10-2008, 09:01 PM

Get yourself a 2JZ Aristo cat from any engine importer or import compliance shop (and don't pay more than $50 if you have to pay anything) and have someone fit some 2.5" or 3" flanges (whichever size your exhaust will be) to it to suit your car.
My 1J cressida made anywhere from 200 to 220rwkW with an aristo cat installed.

**andrew_mx83** · 16-10-2008, 10:50 AM

Originally Posted by Z2TT

they thought there was something suss with me.

sounds like they know what theyre talking about, maybe you should go back and have another look

**Z2TT** · 16-10-2008, 08:13 PM

No point going back to the same place if I'm not allowed to measure the cat.

**oldcorollas** · 23-10-2008, 01:35 AM

Originally Posted by Z2TT

Are the dimensions of the catalytic converter and the inlet diameters the only factors that I should consider. Would the Internals of the cat affect flow and differ from one another? Example 2 cats same dimensions and Inlets that have different designed internals that would affect flow, or are most cats the same Internally?

you haven7t been reading have you????

metal core (round)
ceramic core (oval)
measure the frickin size fo the core (from the outside) to compare core sizes.

ie.. measure the diameter (if circle) or the width and height (if oval) to find size of core, ie the cross-section of the core.

you will find that MOST CORES ARE SAME SIZE or close to it.

the inlet and outlet make no difference.. you can cut them off.

you want to find a BIG CORE...

but oval shaped ceramic cores flow worse than round metal cores.. and the oval cores take up more space...

but oval ceramic cores should last longer if they are not over heated

the change to metal cores was to reduce cost, and reduce size, but mostly to reduce cost....

try and read back a few posts