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Old 11-15-2011, 08:47 AM
mrbinks808 mrbinks808 is offline
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Is it illegale to remove the catalytic converter from a truck in the state of FL?
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Old 11-15-2011, 09:13 AM
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Yes it is illegal.
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Old 11-15-2011, 09:23 AM
mrbinks808 mrbinks808 is offline
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That sucks oh well
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Old 11-15-2011, 09:26 AM
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Why do you want to remove it? Not that I recommend it but FL doesn't have inspections...
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Old 11-15-2011, 09:55 AM
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Had heard that it can improve MPG but was still doing research was just curious. Suppose it could be gutted and left in line in all is true about the fuel economy increase.
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Old 11-15-2011, 10:02 AM
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You wouldn't gain any fuel economy, at least not anything noticeable. Many people remove them for performance, but even then they are only worth a few hp at most. Today's converters flow pretty good, and I'd guess that on a diesel it'd make even less of a difference than on a gasser as diesels spin lower rpm's so the exhaust velocity would be lower. No proof here of that but just a guess. You'd likely get engine lights as well, although I'm not familiar with the diesel systems, I'm sure they monitor the converters like the gasser systems do, and you can make simulators that trick the computer to thinking the cat is still there and avoid the engine light, but IMO it's a bunch of effort to gain basically nothing, then possibly have issues with it later on.

The only time I find it reasonable to remove a converter is if it's clogged and causing issues. I don't like running without a converter, it is extremely bad for the environment and having one barely makes a difference in performance or mpg, but I had issues at high mileage with the one on my s10 so I did remove it. I wasn't willing to spend $700 on a new one for a truck worth $2,000.
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Old 11-15-2011, 10:35 AM
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My buddy is running no cats on his duramax and he did not get any MPG increase. I think it actually went down a little because he floors it all the time to hear it. It actually sounds awesome on his truck though.
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Old 11-16-2011, 05:57 PM
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Quote:
Originally Posted by snrusnak View Post
yes it is illegal.
but so are all mods to exhaust in the state of fl...but that dosent stop any one
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Old 11-16-2011, 08:01 PM
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Quote:
but so are all mods to exhaust in the state of fl...but that dosent stop any one
?... all mods are not illegal. You have to have a cat in every state I'm sure. Any other exhaust mod should be trouble free from the law. Even loud mufflers, although technically illegal, you never get in trouble for them. Yeah, you can get away with no cat, but shouldn't, it is really not worth it, they are very helpful and like said hardly effect performance nowadays, and without them you also get a terrible rotten egg smell.
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Old 11-16-2011, 08:40 PM
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Catalytic converters are a FEDERAL mandated emissions requirement. As such, it's illegal to remove them in ANY state, but like so many have said, people do it regardless. The performance is negligable, and unless you delete the rear O2 sensors, you will throw codes and actually decrease your MPGs as the computer is forced to compensate for the saturated exhaust gasses.

On a diesel, once you start increasing the boost levels past the stock max, you can basically throw the cats out as they do not have enough time to really do much, not to mention the fact that extreme EGTs can cause severe issues with cats followed by your turbo melting down. If you are running a chip on the highest setting and have upgraded your injectors, your cats will clog up in no time and you'll be forced to chop them out anyways.
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