Exhaust on a I6?
04-05-2009, 10:01 PM
#16
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Year: 1992
Model: Cherokee
Engine: 1995 ZJ 4.0
What computer controlled cars are you talking about I only build LS1/ls2/ls6 motors in my street/strip cars and they are comp controlled just because they computer is set one way from the factory does not mean it can never be changed
And also cutting off the cat on your car is not WRONG like littering is WRONG not all areas require them and unless you drive your car at 50-60 mph from the time you start it till you park it then at some point your car puts out just as much pollution as if you didn't have one.
The catalytic converter, an invention that has sharply reduced smog from cars, has now become a significant and growing cause of global warming, according to the Environmental Protection Agency.
"The long-term problem is that even converting exhaust fumes into less toxic types - such as CO2...."
Apparently CO2 isn't the worst culprit:
But researchers have suspected for years that the converters sometimes rearrange the nitrogen-oxygen compounds to form nitrous oxide, known as laughing gas. And nitrous oxide is a potent greenhouse gas, more than 300 times more potent than carbon dioxide, the most common of the gases, that is warming the atmosphere, according to experts.Printed in the NEW YORK TIMES 2/09
And also cutting off the cat on your car is not WRONG like littering is WRONG not all areas require them and unless you drive your car at 50-60 mph from the time you start it till you park it then at some point your car puts out just as much pollution as if you didn't have one.- First, the catalytic converter in your car is designed to be most effective at speeds of 50 to 60 miles per hour. Actions that reduce speeds below this level will lead to more pollution.
- Second, any engine must work more, consume more fuel, and emit more pollution when it accelerates than when it operates at steady speeds. Stop-and-go traffic thus leads to even more pollution.
- To make matters worse, catalytic converters are likely to cool off in stop-and-go traffic. When their temperatures fall below around 400 degrees, they are much less effective. Thus, in stop-and-go traffic you might as well not have pollution control equipment in your car.
The catalytic converter, an invention that has sharply reduced smog from cars, has now become a significant and growing cause of global warming, according to the Environmental Protection Agency.
"The long-term problem is that even converting exhaust fumes into less toxic types - such as CO2...."
Apparently CO2 isn't the worst culprit:
But researchers have suspected for years that the converters sometimes rearrange the nitrogen-oxygen compounds to form nitrous oxide, known as laughing gas. And nitrous oxide is a potent greenhouse gas, more than 300 times more potent than carbon dioxide, the most common of the gases, that is warming the atmosphere, according to experts.Printed in the NEW YORK TIMES 2/09
Last edited by bigbadxj; 04-05-2009 at 10:09 PM.
04-06-2009, 01:07 PM
#17
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Year: 1991
Model: Cherokee
Engine: 4.0
What computer controlled cars are you talking about I only build LS1/ls2/ls6 motors in my street/strip cars and they are comp controlled just because they computer is set one way from the factory does not mean it can never be changed And also cutting off the cat on your car is not WRONG like littering is WRONG not all areas require them and unless you drive your car at 50-60 mph from the time you start it till you park it then at some point your car puts out just as much pollution as if you didn't have one.
The catalytic converter, an invention that has sharply reduced smog from cars, has now become a significant and growing cause of global warming, according to the Environmental Protection Agency.
"The long-term problem is that even converting exhaust fumes into less toxic types - such as CO2...."
Apparently CO2 isn't the worst culprit:
But researchers have suspected for years that the converters sometimes rearrange the nitrogen-oxygen compounds to form nitrous oxide, known as laughing gas. And nitrous oxide is a potent greenhouse gas, more than 300 times more potent than carbon dioxide, the most common of the gases, that is warming the atmosphere, according to experts.Printed in the NEW YORK TIMES 2/09
And also cutting off the cat on your car is not WRONG like littering is WRONG not all areas require them and unless you drive your car at 50-60 mph from the time you start it till you park it then at some point your car puts out just as much pollution as if you didn't have one.- First, the catalytic converter in your car is designed to be most effective at speeds of 50 to 60 miles per hour. Actions that reduce speeds below this level will lead to more pollution.
- Second, any engine must work more, consume more fuel, and emit more pollution when it accelerates than when it operates at steady speeds. Stop-and-go traffic thus leads to even more pollution.
- To make matters worse, catalytic converters are likely to cool off in stop-and-go traffic. When their temperatures fall below around 400 degrees, they are much less effective. Thus, in stop-and-go traffic you might as well not have pollution control equipment in your car.
The catalytic converter, an invention that has sharply reduced smog from cars, has now become a significant and growing cause of global warming, according to the Environmental Protection Agency.
"The long-term problem is that even converting exhaust fumes into less toxic types - such as CO2...."
Apparently CO2 isn't the worst culprit:
But researchers have suspected for years that the converters sometimes rearrange the nitrogen-oxygen compounds to form nitrous oxide, known as laughing gas. And nitrous oxide is a potent greenhouse gas, more than 300 times more potent than carbon dioxide, the most common of the gases, that is warming the atmosphere, according to experts.Printed in the NEW YORK TIMES 2/09
and end up casing more and worse problems
like in Calif the mtb additive is a thousand times worse for the environment
that the emotions it reduces
04-06-2009, 01:45 PM
#18
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Year: 1992
Model: Cherokee
Engine: 1995 ZJ 4.0
That is why I never just do what ever the Government or News say is right. I always view both sides and make my own judgment on how to live and what is right and wrong.
04-06-2009, 02:28 PM
#19
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Year: 1989
Model: Cherokee
Engine: 4.0
i pulled the exhaust bolts off from in front of my cat and moved it down and rebolted it so its all still there but it just comes out right before the cat instead... just to play with it... actually doesnt sound that bad but its loud as crap... lol... it probly helped my HP but i cant tell... nobody probly will tell the difference in just exhaust... only on the dyno really... my cats busted so its probly better... got a single chamber muffler im gonna stick on it once i get it back on the road... just to see... lol
04-06-2009, 05:45 PM
#21
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Year: 1991
Model: Cherokee
Engine: 4.0
Well I know for a fact that running it like that will not make it run better. While my buddy was doing the transfer drop on my xj somehow he broke my exhaust right were the head pipe meets the cat. That happened like 2 weeks ago so it's still not fixed. My jeep is loud as all hell and has a horrible spudder right off idle, when I'm wheeling the thing spits n spudders like crazy. Being in the motorcycle industry for years I know how backpressure affects motors.... not sure how much transfers to cars or trucks but I know with bikes having no backpressure makes for very bad bottom end power. Just like I'm having with my xj right now. I figure since I have to replace it I'm gonna do a whole system. I'll let ya know how it comes out
are you sure you didn't damage the o2 sensor
I bet your just being lighter on the peddle because of the noise
04-06-2009, 06:17 PM
#22
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Year: 1988
Model: Cherokee
Engine: Renix 4.0 I6
i run a glasspack right after the cat and thats it i have it coming out the side of the jeep it sounds nice dont know about horsepower though
04-07-2009, 09:54 AM
#24
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Year: 1989
Model: Cherokee
Engine: 4.0
Na it's quite obvious when you look under the truck.... the whole head pipe is broke in half right before it hit's the cat. It was running great before that I just tuned it up.. plugs, wires, cap, rotor, fuel filter, air filter, belt, water pump, had one bad injector, think was running like a top. Now of idle when I punch the gas it spit's n spudders like crazy. I have to be light on the pedal cause the more gas I give it the more it spudders. I've been thinking twice when pulling out infront of people since this happened.
04-07-2009, 10:32 AM
#25
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Year: 1992
Model: Cherokee
Engine: 1995 ZJ 4.0
Well I know for a fact that running it like that will not make it run better. While my buddy was doing the transfer drop on my xj somehow he broke my exhaust right were the head pipe meets the cat. That happened like 2 weeks ago so it's still not fixed. My jeep is loud as all hell and has a horrible spudder right off idle, when I'm wheeling the thing spits n spudders like crazy. Being in the motorcycle industry for years I know how backpressure affects motors.... not sure how much transfers to cars or trucks but I know with bikes having no backpressure makes for very bad bottom end power. Just like I'm having with my xj right now. I figure since I have to replace it I'm gonna do a whole system. I'll let ya know how it comes out
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