How to run without cat?
#1
02-15-2006, 10:24 AM
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How to run without cat?
Anyone running headers without their catalytic converter? If so, how are you getting around the downstream O2 sensor? Is your engine light on? Or is there a way to trick the PCM. I have a Neon with a AF/X PCM that ignores the O2, and wondered if there was something similiar for the Ram's. Thanks for any input.
#2
02-16-2006, 01:36 AM
RE: How to run without cat?
Can't help you with any of your questions but i thought i might let you know that if you do remove the cat and take your car to get inspected, if they notice it, they confiscate your car. It happened to my buddy. I'm sure it varies from state to state, but if you are in Texas, be careful.
#3
02-16-2006, 10:17 AM
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#5
02-16-2006, 08:09 PM
![rob[GL]'s Avatar](data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 50 50'><circle class='avatar-circle-default' fill='%23d23ab9' cx='25px' cy='25px' r='20px'></circle><text class='avatar-text-default' x='49%' y='53%' fill='white' text-anchor='middle' alignment-baseline='middle'>r</text></svg>)
RE: How to run without cat?
Absolutely nothing.
"Back in the day" catalytic converters were made with pellets and often too small or restrictive... Removing the cat's improved the flow of the exhaust and resulted in improved performance. This day and age, the interior of a catalytic converter is a honeycomb, and while 50% of the interior is restricted, the catalytic converter itself is 200% in size compared to the exhaust pipe... So if you have 2+1/2" exhaust pipe, your catalytic converter will be about 5" in diameter, and even though 50% is restricted, you still have the exact same air flow through the cat as if it were a straight pipe. I have seen vehicles with these new catalytic converters with 100K miles on them, cut them open, they look brand new on the inside. Unless your truck has a serious problem with burning oil or sending un-burnt fuel into the exhaust, and then igniting... Removing the cat's on a new dodge is pointless and expensive.
"Back in the day" catalytic converters were made with pellets and often too small or restrictive... Removing the cat's improved the flow of the exhaust and resulted in improved performance. This day and age, the interior of a catalytic converter is a honeycomb, and while 50% of the interior is restricted, the catalytic converter itself is 200% in size compared to the exhaust pipe... So if you have 2+1/2" exhaust pipe, your catalytic converter will be about 5" in diameter, and even though 50% is restricted, you still have the exact same air flow through the cat as if it were a straight pipe. I have seen vehicles with these new catalytic converters with 100K miles on them, cut them open, they look brand new on the inside. Unless your truck has a serious problem with burning oil or sending un-burnt fuel into the exhaust, and then igniting... Removing the cat's on a new dodge is pointless and expensive.
#6
02-17-2006, 01:09 AM
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RE: How to run without cat?
ORIGINAL: rob[GL]
Absolutely nothing.
"Back in the day" catalytic converters were made with pellets and often too small or restrictive... Removing the cat's improved the flow of the exhaust and resulted in improved performance. This day and age, the interior of a catalytic converter is a honeycomb, and while 50% of the interior is restricted, the catalytic converter itself is 200% in size compared to the exhaust pipe... So if you have 2+1/2" exhaust pipe, your catalytic converter will be about 5" in diameter, and even though 50% is restricted, you still have the exact same air flow through the cat as if it were a straight pipe. I have seen vehicles with these new catalytic converters with 100K miles on them, cut them open, they look brand new on the inside. Unless your truck has a serious problem with burning oil or sending un-burnt fuel into the exhaust, and then igniting... Removing the cat's on a new dodge is pointless and expensive.
Absolutely nothing.
"Back in the day" catalytic converters were made with pellets and often too small or restrictive... Removing the cat's improved the flow of the exhaust and resulted in improved performance. This day and age, the interior of a catalytic converter is a honeycomb, and while 50% of the interior is restricted, the catalytic converter itself is 200% in size compared to the exhaust pipe... So if you have 2+1/2" exhaust pipe, your catalytic converter will be about 5" in diameter, and even though 50% is restricted, you still have the exact same air flow through the cat as if it were a straight pipe. I have seen vehicles with these new catalytic converters with 100K miles on them, cut them open, they look brand new on the inside. Unless your truck has a serious problem with burning oil or sending un-burnt fuel into the exhaust, and then igniting... Removing the cat's on a new dodge is pointless and expensive.
#7
02-17-2006, 04:58 AM
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02-17-2006, 06:55 PM
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02-17-2006, 07:07 PM
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