catless?

[Th0r]

I'm sure I could search but I'm on my phone. Simple question. Can I run without a cat without any issues other than a light? Some unexpected bills hurt the budget and I'm litterally in the middle of doing my exhaust.

[[ion] C2]

uh... duh lol

[jayson_waltz]

yep, just don't go do any inspections and deal with the light. it'll be fine til you get one.

[Th0r]

Hey cut me some slack. I work at a caddy dealership. I'm used to seeing cars run like shit or go into limp mode with a hollowed cat. :P Just wanted to make sure our ecm isn't as anal. Haha.

[DOHC_tuner]

Yes it just helps filter the exhaust so without it your car will smell ugly out the muffler. Oh and dont forget it will sound like shit.

[[ion] C2]

shouldn't happen on any car. the rear O2 doesn't do anything but monitor how well the cat is converting the dangerous gases. that's stupid if the PCM would take any action based on that.

Yes it just helps filter the exhaust so without it your car will smell ugly out the muffler. Oh and dont forget it will sound like shit.
Yeah mine sounds like shit right? It's the quietest thing ever when I don't have the cutout open. Even with the cutout open it's not too crazy.

Cutout open: http://www.youtube.com/watch?v=RlbcASDGdy8

Cutout closed: http://www.youtube.com/watch?v=ayHajgTw8XY
(old video, BOV sounds cleaner now. new vid with flyby's soon)

[DOHC_tuner]

A boosted car is different....Im referring to a N/A car.

[Th0r]

I've got a 24" resonator off a northstar STS to keep shiity sound to a minimum. 2.5" diameter so it mates to the header downpipe perfectly.

[[ion] C2]

A boosted car is different....Im referring to a N/A car.
N/A car with the same mufflers I have is quiet too. Not near as quiet as a turbocharged one, but still the least obnoxious it can be without a cat.

[DOHC_tuner]

Well I prefer to run with a cat.

[comanche]

It is a fact that some cars will run slower times with the cat removed. Back pressure is necessary.

I assume that this is the same case with aleros?

[Th0r]

Exhaust is on. The caddy resonator measured up alright but, once welded up, there wasn't enough clearance to keep it from rattling against the underside. So I the shop ran 2.5" header back to a Dynomax super turbo. Sounded like tin-canned shit. They put a glass pack in line as a resonator and it smoothed it out a lot. It's still louder then I wanted though. It sounds pretty deep and not the typical honda BrapBrapBrap sound, but I still may have to swap in a straight-thru muffler in place of the glass pack to quiet it down a little bit more. I'll have to see how well the muffler breaks in. My tip also seems a bit too large now that it's on the car. bah!

[[ion] C2]

Weird. I have a magnaflow straight through 4" can before the Dynomax Super Turbo (Camaro style)

[alero_bmxer]

i love my dynomax super. sounds nothing like a typical 4 cylinder

[Th0r]

Ion, so you have both mufflers behind your bumper, or is one mid-body? I probably will go with a 4" magnaflow once money gets better.

On another note, I found this on j-body and it seems to be working for my downstream 02 sensor. You need 2 18mm spark plug anti-foulers. the HELP! part number is 42009. $6 and no CEL. Gotta read to get the full info since it's old and links are broken. http://www.j-body.org/forums/read.php?f=2&i=438065&t=309456&p=1

One thing is for sure, I have more pull in the top end and I like it. I'll post pics later.

[[ion] C2]

The Magnaflow straight through can is mid-body right after my cutout. Both of those together seem to be nice and quiet yet still high flow.

[Alerojester]

ok i found a dumby o2 sensor, google an o2 sensor eliminator they are like $50 on ebay

[AlbinoMonkeyRat]

ion, what kind of performance differences do you see with the cutout open vs closed? (numbers if possible)

when I had broken exhaust (basically open pipes) it felt like about 5-10 seat hp more; but sounded like shit (but I've always been NA). Now I have Pacesetter headers, magnaflow cat, magnaflow straight-through (mid-body) and a Borla Pro-XS behind the axle and sounds pretty nice, but the performance feels like just a more-peppy OEM.

[[ion] C2]

Dunno, don't feel any difference really. It's loud and sounds insane at WOT... I can do an open vs. closed test at the track in the spring, but it will probably be a minimal difference.

[AleroDrime]

speaking of cats, isnt it tme for some of the first aleros not to need cats after 2013 or 14, no emissions tests on inspections?

[AlbinoMonkeyRat]

ummm...if it was made after 1996 and in a state that requires emissions tests for inspections, then it must be OBD-II compliant. So...NO. all aleros in emissions testing states will still need their cat.

[Luley]

reall you dont need the cat. my friend that buildt his tegra took off the cat for his muffler and to loose weight

[alero_bmxer]

:huh: huh?

[Th0r]

To Kool Fo Gramahr!

[JLw7123]

I had no cat on my old alero for a while and it was way to loud.

[[ion] C2]

reall you dont need the cat. my friend that buildt his tegra took off the cat for his muffler and to loose weight
no shit sherlock, he's saying LEGALLY you need a cat

[spyhunter]

reall you dont need the cat. my friend that buildt his tegra took off the cat for his muffler and to loose weight


No seriously, you do need a cat. Even states without emissions testing, what you have been doing is tampering w/ an emissions control device. That can be considered a no no. Also w/ the way things are going, do not be surprised when emissions testing comes to your town.

[MixtapeMessiah]

No seriously, you do need a cat. Even states without emissions testing, what you have been doing is tampering w/ an emissions control device. That can be considered a no no. Also w/ the way things are going, do not be surprised when emissions testing comes to your town.

Here in OKlahoma u do NOT need cats, they did away with emission testing a few years ago. I still would go with a high flow cat just incase you do plan on living in a state with emission testing

As for this guy saying he saved weight on his integra, that is grade A retarded. This isnt NHRA drags where ever lb is worth .01 of a second

[[ion] C2]

Just because they don't have emissions testing in that state does NOT mean that it isn't illegal! It's a FEDERAL law, that supercedes state and local ordinances. So if the Feds decide to take a look under your car one day and find no catalytic converter, you're in trouble.

[billytheman1188]

As for this guy saying he saved weight on his integra, that is grade A retarded. This isnt NHRA drags where ever lb is worth .01 of a second

i was just about to comment on that. your buddy is what we like to call a ricer..... saving weight.....lol

[spyhunter]

Here in OKlahoma u do NOT need cats, they did away with emission testing a few years ago. I still would go with a high flow cat just incase you do plan on living in a state with emission testing

As for this guy saying he saved weight on his integra, that is grade A retarded. This isnt NHRA drags where ever lb is worth .01 of a second

Federal law prohibits the removal of a properly functioning catalytic converter from a vehicle. Just because your state does not require it does not mean it's okay to take it off.

[MixtapeMessiah]

Federal law prohibits the removal of a properly functioning catalytic converter from a vehicle. Just because your state does not require it does not mean it's okay to take it off.

correction, dont get caught then

[spyhunter]

correction, dont get caught then

I've never been caught. :-p

[MixtapeMessiah]

I've never been caught. :-p

on another note dude, I sold that quad 4 intake mani and tb I bought from u a longgg time ago lol

[AlbinoMonkeyRat]

reall you dont need the cat. my friend that buildt his tegra took off the cat for his muffler and to loose weight
really? for weight?? it's like an extra half pound. your car would never notice the difference in terms of weight alone.

[AlbinoMonkeyRat]

C2;521563']Just because they don't have emissions testing in that state does NOT mean that it isn't illegal! It's a FEDERAL law, that supercedes state and local ordinances. So if the Feds decide to take a look under your car one day and find no catalytic converter, you're in trouble.
I think the loophole here is that if the cat was broke when you took it off (with documentation) and you're in a state that doesn't require it, catless is legal. and that would be the ONLY way.

[[ion] C2]

Oh, well mine was broke so I must be good.

[Nate's Alero]

C2;521890']Oh, well mine was broke so I must be good.

not "broke" just full of shit.. if you cleaned it (is that possible) would it work again?

[[ion] C2]

broke = clogged

how else does a cat fail besides just simply falling apart, which mine did as well

[AlbinoMonkeyRat]

basically, once you cross the 80k mark in one of those "no emissions test" states, you're good to go....I guess.

[AleroDrime]

I've always been told if the vehicle is 15+yrsold, theres no emissions testing and what ever you want can be done exhaust wise, There's alot of straight pipe pickups here and theirs no noise ordinance on exhaust.