Question about Catalytic Converters

[Pizdous]

I was thining about taking off my Catalytic Converters and just puting a straightpipe to my exhaust and i was wondering if that could mess up my o2 sensors? ? someone told me if i took them off i would get more power??

thanks for your time

ldb

[Kompressor]

As long as you don't have emmisions tests you're fine.

[Dado]

it will help with power/though you will have loss in low end torque. dont expect to pass emissions though.


---john

[James]

I wouldn't necessarily suggest just welding in straight pipes. I have seen it done on a 95 M3 before and the result in sound was very un-European. Very tinny sounding, almost like a 4 cylinder. If you take out the O2 sensors, you will automatically throw a check engine light, and the car will also run inconsistently. Dado has this problem back in the day, sometimes his car would be the fastest normally aspirated M3 of the group, but other days he woudl easily be left behind. Typically the car ran very rich without O2 sensors.

[Pizdous]

cool thanks for the help guys

[schussey]

i think its fine if you don't have state inspection

[Pizdous]

Just moved to florida no DEQ

[SG_M3]

what year is your car?

[Pizdous]

95 m3 68k miles

[Matthew C Smith]

It's not a problem then. There are no post cat O2 sensors.

It's still not legal.

[r6e36]

If your car is FI then by all mean take the cat out. You'll get pretty good gain. If your motor is NA don't bother, it will only give you louder exhaust noise and will definately fail emmision.

[1YellowSpecV]

Originally posted by r6e36
If your car is FI then by all mean take the cat out. You'll get pretty good gain. If your motor is NA don't bother, it will only give you louder exhaust noise and will definately fail emmision.

He would still gain some w/o F/I. Not much, but you will gain high end power... and lose a little low end tq like Dado said.

[Pizdous]

yeah, i was thinking about it and maybe its not worth all the work... so im probably just gonna change my exhaust cuz i still have the stock one and i dont like it at all...