Catless primaries with stock secondaries

[Avon]

Am I wasting my time and efforts if I only change primaries to catless but keep stock secondaries?

 

[Yadiel]

Con el jb4, se activan los códigos 02 al eliminar los catalizadores principales y se serrana el throttle por el sobre jiro de la turbina?

 

[SRV]

Con el jb4, se activan los códigos 02 al eliminar los catalizadores principales y se serrana el throttle por el sobre jiro de la turbina?

Did you notice the posts here are in English?

 

[MerlintheMad]

^^^Total silence in the first post, back in March.

 

[oddball]

That would be a very odd choice. The secondary are far easier to change, and they have to come off when replacing the primaries anyway. Replacing the primaries already kills any hope of meeting smog controls and it's visually obvious, so no benefit there from keeping the secondaries.
So, sure, if you really want to, but the turbos won't react quite like the tune expects them to. There's also a chance the secondary cats will melt - they'll get a whole lot more fuel than they were ever designed to deal with.
It is physically possible to remove all the guts from a cat also. Just use caution - lots of heavy metals and interesting elements in there.

 

[Avon]

I was only hoping to keep the secondaries just to reduce sounds because I have a muffler delete.

I know removing the secondaries doesn't gain you much so hoped keeping them didn't hurt much.

 

[SRV]

^^^Total silence in the first post, back in March.

Not sure what you're seeing for a date.

I'm seeing - 'Yesterday at 8:04 PM'.

 

[MerlintheMad]

Not sure what you're seeing for a date.

I'm seeing - 'Yesterday at 8:04 PM'.

Lozic ECU/TCU tune inquiry. I was checking his post history, all of two: and didn't notice that he had replied to General Vodka in an uncommon way, using the quote box. So, never mind.

 

[Avon]

I ended up just keeping secondaries stock for now. Was hoping I'd hear someone else say they'd done the same but maybe a trailblazer

 

[oddball]

I ended up just keeping secondaries stock for now. Was hoping I'd hear someone else say they'd done the same but maybe a trailblazer

Yeah, you're on your own. Definitely inspect the front side of those secondary cats from time to time to make sure they're not melting. If concerned about noise, having a shop build up some resonator pipes to replace the secondaries would probably work out well.

 

[Avon]

I'll start looking for catless secondaries. This will just be temporary.