CAN I CUT MY EXHAUST OFF?

[someotherguy]

Mount your O2 sensor in the same location. I see no issues.

I did something similar to a 1995 V6 4.3L S10 but I came to regret it. It ran fine, but it stunk... it smelled like a 60's Chevy (think "unburned hydrocarbons") and stunk up the garage, wherever. The smell wasn't a big deal but I didn't like it (people wondered "What's wrong with the truck?") and the wife didn't like the smell (unhappy wife unhappy life).

I eventually found a new OE cat and re-installed.

One thing I absolutely miss is the smell of non-catted exhaust. I ran my '94 like that for quite a while. Before I went nuts with 400's, I was nuts with.. you might have guessed.. 60's Chevy trucks. Ran a small salvage operation for those too, in the 90's.

Late model stuff with cats smell awful. Under normal running conditions yeah, no real odor, but when they mash on it on the highway.. ugh. Burning hair/ammonia smell.

Richard

 

[Frank Enstein]

One thing I absolutely miss is the smell of non-catted exhaust. I ran my '94 like that for quite a while. Before I went nuts with 400's, I was nuts with.. you might have guessed.. 60's Chevy trucks. Ran a small salvage operation for those too, in the 90's.

Late model stuff with cats smell awful. Under normal running conditions yeah, no real odor, but when they mash on it on the highway.. ugh. Burning hair/ammonia smell.

Richard

I describe the new car-full throttle exhaust smell as "Burning Hair" myself

 

[someotherguy]

I describe the new car-full throttle exhaust smell as "Burning Hair" myself

They smell gross. About as gross as a chopped/open exhaust TBI truck sounds. Floor it Maynard GOBBLESS

Richard

 

[DerekTheGreat]

Yeah, what's with that? They often puff a ton of black or gray smoke out the tail pipes too when they mash it. None of my archaic EFI stuff does that and even when I had a car with a carb it never puffed any gray or black once I got done tuning it.

 

[618 Syndicate]

Judging from what mr Schurkey said I just gave the feds a perfect opportunity to "get me" just by bringing it up on this forum. Mr Schurkey maybe you should try and lighten up a little it's just a forum and we like to have a little fun every once and a while. Life is too short not to laugh.

No cats on a So Cal truck won't be an issue for long.

 

[0xDEADBEEF]

They smell gross. About as gross as a chopped/open exhaust TBI truck sounds. Floor it Maynard GOBBLESS

Richard

Nothing touches the DPF regen smell. It always happens in the McDonald's drive thru too. Some weird quirk of the universe that is perhaps evidence of determinism.

 

[someotherguy]

Nothing touches the DPF regen smell. It always happens in the McDonald's drive thru too. Some weird quirk of the universe that is perhaps evidence of determinism.

Tell me about it. For years, I drove an F450SD 6.7 PSD for work. Those just stink. Before that, even worse, an F550SD 6.4 PSD that had a clogged DPF so it was in regen so often it was like the mosquito sprayer truck. Huge clouds of funky half-burnt diesel smoke that was eye-wateringly awful. Some may be unaware that the 6.4 PSD predates the DEF systems, so they just inject diesel into the DPF to help burn off the soot. Eventually the DPF clogs. I guess the system is dumb enough that it detects the pressure, says well the DPF needs to be cleaned again, so let's do this some more! Inject more diesel and make the problem worse. Boss was too cheap to have the DPF replaced or pro cleaned.

Richard

 

[Pinger]

One thing I absolutely miss is the smell of non-catted exhaust. I ran my '94 like that for quite a while. Before I went nuts with 400's, I was nuts with.. you might have guessed.. 60's Chevy trucks. Ran a small salvage operation for those too, in the 90's.

Here in the UK cats became standard fitment around the early 1990s. When a pre-early 1990s car drives past my house here (and I'm outside) I can usually smell fuel or burned engine oil or both - and that's an open A-road with traffic going around 50-60 mph. Our roads must have stank before cats - even allowing for the fact that when those cars were newer they'd have been cleaner (just due to less engine wear - but there would have been even older so cancels that probably) and fewer cars back then.

Late model stuff with cats smell awful. Under normal running conditions yeah, no real odor, but when they mash on it on the highway.. ugh. Burning hair/ammonia smell.

Richard

I'm not getting that though. Do you mean gasoline or diesel? Here, if there's any smell from a gasoline car with a cat its that eggy/sulphur smell - but it's pretty rare these days - though early on they did throw out a brownish gach.
Ammonia - is that the SCR that diesels employ (to control NOx)?
I've never smelled one like 'burning hair' - though I did have a cat disintegrate during an MOT (annual safety check) emissions test and it stank. Smelled more like burning brake/clutch friction material though.

 

[someotherguy]

Here in the UK cats became standard fitment around the early 1990s. When a pre-early 1990s car drives past my house here (and I'm outside) I can usually smell fuel or burned engine oil or both - and that's an open A-road with traffic going around 50-60 mph. Our roads must have stank before cats - even allowing for the fact that when those cars were newer they'd have been cleaner (just due to less engine wear - but there would have been even older so cancels that probably) and fewer cars back then.

I'm not getting that though. Do you mean gasoline or diesel? Here, if there's any smell from a gasoline car with a cat its that eggy/sulphur smell - but it's pretty rare these days - though early on they did throw out a brownish gach.
Ammonia - is that the SCR that diesels employ (to control NOx)?
I've never smelled one like 'burning hair' - though I did have a cat disintegrate during an MOT (annual safety check) emissions test and it stank. Smelled more like burning brake/clutch friction material though.

Modern gas engine cars. These people that think their regular traffic is a race car and mash on the pedal to pass you (because doing 80 in a 60 isn't enough for them), then you get that wonderful whiff of burning hair/ammonia smell through your A/C. It's disgusting.

Richard

 

[JACK34]

Perhaps a moderator will move this thread to the Exhaust sub-forum.

Removing a functional catalyst, or removing but not replacing a non-functional catalyst is against Federal law. It is illegal in 50 states, and probably US Territories and Possessions. If the Feds want you, you've given them a perfect opportunity.

You're required to have the same number of catalysts, in the same location as the vehicle was engineered with, unless you've got an "approved" modification complete with EPA or CARB exemption sticker.

Mr Schurkey said a moderator should move this to the exhaust sub-forum. I think that is a good idea I may have posted it in the wrong forum section.