Removing the Cats?

[Vash]

Aye wait till after they are corroded before even worring about them. They would not have 300hp on a 6 banger with poor flow. I drove almost 200,000 miles on a 5.0 GM V8 that was 140 hp if you want to look at bad / poor restrictive emissions systems hehe.. so... just saying like above it's not the 70's...

[Mr Twisty]

Originally Posted by 99b4c

I used to run two cats and no mufflers on my Monte Carlo, it sounded good and loud. I will be pulling the mufflers on my Camaro to hear what it sounds like, if not good than I will remove the cats and remove from the programming.

The cats do quite the exaust a little.

You could remove the cats and...


























Install kittens

[zebra]

^^what happens to the kittens once they've been 'emitted' into the middle of a busy road?

[theholycow]

Originally Posted by Vash

I drove almost 200,000 miles on a 5.0 GM V8 that was 140 hp if you want to look at bad / poor restrictive emissions systems hehe.. so... just saying like above it's not the 70's...

Could be worse. Caddy's HT4100 V8...4.1L making 120hp of non-fury. Lots of torque, though, kinda like a diesel I guess. Trouble is, they didn't last long, the new computer-controlled systems were failure-prone, and the engine was prone to overheating and warping the heads or some such...

[Mr Twisty]

Originally Posted by zebra

^^what happens to the kittens once they've been 'emitted' into the middle of a busy road?

[CamaroSpike23]

Originally Posted by MisterCamaro69

You could remove the cats and...


























Install kittens

Originally Posted by zebra

^^what happens to the kittens once they've been 'emitted' into the middle of a busy road?

Originally Posted by MisterCamaro69

epic win

[shank0668]

my corvette doesnt have a cat. I took it off and got a pipe and the guy that made the pipe said the cat was almost gone anyway. It still sounds a little deeper

[Matrix]

Keep the CATS, just put a decent CAI in to change the sound. Keep the air clean for our kids for the sake of a POSSIBLE 5HP gain, keep your warranty going, save your money, avoid the fines, invest in another mod and avoid potential probloems building up in your engine.

Changing CATS in the 70's & 80's was a totally different kettle of fish to the gains you get now. I dont think it would be worth it at all.

[stovt001]

Originally Posted by Dan

This isnt 1979, all cats are high flow straight through designs. Removing them wont gain you shit.

One thing that bugs me on this forum is that we seem to have a lot of people who don't realize the progress automotive technology has made. They think things are still the way they were back in the 70s. Modern cats are not restrictive. They simply do a good job of cleaning up the exhaust, which is a really good thing for anyone who likes blue skies and breathing. Embrace modernity and keep them on. The car will sound and perform just fine, if not better, than without them.

[LSxJunkie]

Originally Posted by stovt001

Modern cats are not restrictive. The car will sound and perform just fine, if not better, than without them.

Very untrue. When you're calling people stupid, you might not want to make sweeping generalizations. The stock manifold and y-pipe well outflowed the stock cats on my 04 G35. They were, hands down, the biggest bottleneck in the entire exhaust system. Most people replaced them with either high-flow cats or test pipes because it made other exhaust mods pointless in terms of power. Now, the difference in power between a modern high-flow cat and the test pipes was negligible, but the cats virtually eliminated the nasty rasp that the test pipes. To say that modern OEM cats designed to perform for many years and keep a car well within emissions standards flow as well as catless pipes is simply fallacious.

The other factor here is price. When I was shopping headers for my GTO, the price difference between catted and catless midpipes was 150 dollars. The price for HFCs for the G35 was 400 and the test pipes were about 200.



This all having been said, removing the cats is useless unless you get longtubes anyways. I prefer, and probably always will, American Racing. But this may all be a moot point regardless if GM doesn't survive the next year.

[stovt001]

Might want to actually read my post. I never called anyone stupid. Car enthusiasts tend to overestimate the difference their mods make.

[CamaroSpike23]

Originally Posted by stovt001

One thing that bugs me on this forum is that we seem to have a lot of people who don't realize the progress automotive technology has made. They think things are still the way they were back in the 70s. Modern cats are not restrictive. They simply do a good job of cleaning up the exhaust, which is a really good thing for anyone who likes blue skies and breathing. Embrace modernity and keep them on. The car will sound and perform just fine, if not better, than without them.

modern cats arent AS restrictive as those of yesteryear, however they are still a restriction point in the exhaust stream. how much of a restriction is yet to be determined.

Originally Posted by LSxJunkie

This all having been said, removing the cats is useless unless you get longtubes anyways. I prefer, and probably always will, American Racing. But this may all be a moot point regardless if GM doesn't survive the next year.

not entirely. you can run cats with LT's if you wish.

Originally Posted by stovt001

Might want to actually read my post. I never called anyone stupid. Car enthusiasts tend to overestimate the difference their mods make.

I underestimate the difference my mods make.

[LSxJunkie]

Originally Posted by CamaroSpike23

not entirely. you can run cats with LT's if you wish.

No no no, you got me all wrong. Trust me, I spent enough time under my and other GTOs to know that you can run catted mids off of LTs. All I meant was deleting the cats behind stock LSx manifolds is fairly stupid and pointless. Its not worth doing unless you're doing LTs, and even then, you might as well just stay street legal and get high-flows.

[CamaroSpike23]

Originally Posted by LSxJunkie

No no no, you got me all wrong. Trust me, I spent enough time under my and other GTOs to know that you can run catted mids off of LTs. All I meant was deleting the cats behind stock LSx manifolds is fairly stupid and pointless. Its not worth doing unless you're doing LTs, and even then, you might as well just stay street legal and get high-flows.

ah... gotcha.