Removing cat coverter permanently

[T-Fade]

I live in Orlando, Fl and I'm searching for a shop that will remove my cat converter permanently. Does anyone out there have any recommendations?

[chefduane]

Here in DFW I had someone remove my catalytic converter permanently. I was in a not-so-nice area of town and some meth-head tweaker sawzalled it out to get the precious metals inside and get their next fix. Removal was free but install of a new one was a few $$$.

[akirby]

I live in Orlando, Fl and I'm searching for a shop that will remove my cat converter permanently. Does anyone out there have any recommendations?

I sincerely hope not.

[autom8r]

Hmmm. There are pre- and post cat O2 sensors. What are you going to tell the PCM? It'll want to go lean, raising combustion temperature. Valves burn, pestilence and wailing and gnashing of teeth ensue. Not worth it.

Edited January 12, 2017 by autom8r

[akirby]

But there is no reason to remove the CATs - they're not a restriction to high performance.

[WWWPerfA_ZN0W]

Catalytic converters as designed from the factory are not high-flow, that would cost too much probably. High flow replacements usually gain you noticeable hp/tq, not like gobs & gobs of it, but enough.

[akirby]

If you can get over 400 hp from the stock exhaust then I wouldn't call it restrictive. But replacing it with a higher flowing CAT for a few more ponies is ok. Removing it entirely is not a good idea for a street car under any circumstances.

[WWWPerfA_ZN0W]

Not advocating removal of the converters by any means. But how are you getting 400 hp from the stock exhaust on a 2008? Even with a tune you cannot do that. On the 2.7EB, yes, not on the 3.5 non-TiVCT engine. Anyway, the trans will probably give in by then LOL.

[akirby]

Sorry I didn't mean specifically from a 2008 3.5. I was just saying that it's easy to get 400 hp out of a stock factory converter and in some cases like the Mustang 5.0 you can add a supercharger and get 700 without changing the factory cat (as far as I know). So you don't have to remove the cat to make big power.

[gjb89]

delete

Edited January 12, 2017 by gjb89

[enigma-2]

One other thing to consideris if you trade the car in with a dealer, they will reduce the value of the car by what it costs to bring it back into your state's emission standards. (At least that's true for my state of Indiana.) Ok if private sale, but dealers are required to maintain emmision standards.

[autom8r]

 

It will still adjust the fuel mixture accordingly and the engine will live just fine.

 

He will get a CEL for cat inefficiency though. That would have to be programmed out.

 

It's not worth the hassle. I suppose he could thread the post cat O2 sensor into the exhaust spool piece and have partial control of the mixture. That would be better than going open loop on the fuel mixture control loop.

 

Theoretically, the engine is more efficient (and produces the most power) when the O2 sensors (pre and post) are part of the fuel ratio control. The pulse duration of the injectors and the spark plugs are controlled by the input signal received from the O2 sensors. Those sensors detect whether complete combustion is taking place and adjust timing and pulse duration to achieve as complete a burn as possible.

 

Agreed that you may get a smidge more power by running slightly lean, but it raises cylinder head temperature and may cause detonation.

 

The best option is high flow cats as akirby suggests, or maybe a dual exhaust like on the 3.7 sport.