muffler, no muffler, no cat...

[tywilson88]

currently im not running a cat (i know its illegal):p. Some say that is stupid and you lose power, so i thought i would test this theory... since i had to do emissions test today i would put on the old (aftermarket) muffler and stock cat. this was the least amount of flow, and it did not have so much power. most of the time i run just the cherry bomb muffler, and when i got back, i took the other set up off, and tried it out. i thought it would have more power because of more flow. i was right:cool:. i seemed to have quite a bit more torque and horsepower. then i took the muffler and cat totally off. straight pipe...:D there was a terrible loss of power and torque, and it was stupid loud:eek:. i was suprised, not that it was loud, but i figured that since i had more flow it would be better. nope. i guess this theory is halfway correct:)

[Devil Man]

currently im not running a cat (i know its illegal):p. Some say that is stupid and you lose power, so i thought i would test this theory... since i had to do emissions test today i would put on the old (aftermarket) muffler and stock cat. this was the least amount of flow, and it did not have so much power. most of the time i run just the cherry bomb muffler, and when i got back, i took the other set up off, and tried it out. i thought it would have more power because of more flow. i was right:cool:. i seemed to have quite a bit more torque and horsepower. then i took the muffler and cat totally off. straight pipe...:D there was a terrible loss of power and torque, and it was stupid loud:eek:. i was suprised, not that it was loud, but i figured that since i had more flow it would be better. nope. i guess this theory is halfway correct:)
just a cat
http://www.virtualjeepclub.com/attachment.php?attachmentid=13159&d=1187731466

[ademster]

in order for the engine to operate properly...

You have to have some Back pressure....

BUT you don't want toooooo much back pressure.

The standard back pressure is 3 psi or lower.

[AZLugz]

I would also be careful about announcing in the open forum that you are voiding your emmissions

[tywilson88]

im not, i got emissions. i just put the old stuff back on to get them... then i put the good stuff on for every other time.

[DesertX04]

What are the emissions tests for?

[Wayco]

In order for your Jeep to operate properly, some of the tires must be in contact with the ground...http://www.virtualjeepclub.com/attachment.php?attachmentid=13159&d=1187731466

[AZLugz]

im not, i got emissions. i just put the old stuff back on to get them... then i put the good stuff on for every other time.


The point is, if someone reports you, you could be in a fair bit of trouble for intentionally breaking the law, and this is a big law in this area due to pollution problems

[tywilson88]

oh... ill leave it on then

[Devil Man]

In order for your Jeep to operate properly, some of the tires must be in contact with the ground...http://www.virtualjeepclub.com/attachment.php?attachmentid=13159&d=1187731466

it has two on the ground:rolleyes:

[DesertX04]

and this is a big law in this area due to pollution problems

That's what I was getting at.:)

[Devil Man]

The point is, if someone reports you, you could be in a fair bit of trouble for intentionally breaking the law, and this is a big law in this area due to pollution problems

are you from AZ:confused:

[RokNRich]

any codes ?




currently im not running a cat (i know its illegal):p. Some say that is stupid and you lose power, so i thought i would test this theory... since i had to do emissions test today i would put on the old (aftermarket) muffler and stock cat. this was the least amount of flow, and it did not have so much power. most of the time i run just the cherry bomb muffler, and when i got back, i took the other set up off, and tried it out. i thought it would have more power because of more flow. i was right:cool:. i seemed to have quite a bit more torque and horsepower. then i took the muffler and cat totally off. straight pipe...:D there was a terrible loss of power and torque, and it was stupid loud:eek:. i was suprised, not that it was loud, but i figured that since i had more flow it would be better. nope. i guess this theory is halfway correct:)

[tywilson88]

yep im in the az, and there is no codes showing

[Devil Man]

yep im in the az,

not in from & not you;)

[tywilson88]

oh... yeah i know:o...

[RokNRich]

FYI

http://www.rubiconownersforum.com/phpbb2/viewtopic.php?t=50437&highlight=


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