Hello, I have a 74 Duster with a 360 and TTI headers. I'm looking to get the TTI exhaust system, but I would like to add catalytic converts. Does anyone have experience running the TTI 3" exhaust system with catalytic converters? How was the fitment?
Cats on TTI exhaust system
- Thread starter n00blike
- Start date
-
i gotta ask, why add cats?
LMAO
?LMAO
That was worth staying up to midnight for...
Drive a Prius or an EV and put the car for sale up here… probably not the answer you were hoping for, but it’s the best I got right now.
mopowers
Well-Known Member
A couple questions to ponder. Use google if you need to.
1. What do catalytic convertors do?
2. What type of air pollutant emissions did the documentary claim was negatively impacting shellfish?
3" on a 360 and Cat's... okay. It would be quiet at least...
Why? What is wrong with wanting cats on an old car? New cars with higher performance engines run cats.
I gotsta ask here. What happened to factory catalytic converter on the car? Should have been smogged nearly to death to start with…
I know, right? LOL
What they convert
A catalytic converter turns:
- Carbon monoxide (CO) → carbon dioxide (CO₂)
- Unburned hydrocarbons (HC) → water (H₂O) + CO₂
- Nitrogen oxides (NOx) → nitrogen (N₂) + oxygen (O₂)
Yes — nitrogen oxides (NOx) can indirectly harm shellfish, though the effect isn’t usually direct poisoning. The main issue is how NOx changes the chemistry of the water.
Here’s how it works:
1. NOx contributes to ocean acidification
NOx released into the air (from cars, power plants, agriculture) can dissolve into rainwater and form nitric acid.
When this enters the ocean or coastal waters, it lowers pH slightly, contributing to acidification.
Why this harms shellfish
Shellfish such as oysters, clams, mussels, and scallops need carbonate ions to build their calcium carbonate shells.
Acidification reduces carbonate availability, making it:
- harder for juveniles to form shells
- easier for existing shells to dissolve
- more energy-intensive to grow
This leads to lower survival and slower growth, especially in larvae.
2. NOx can also cause nutrient pollution
Nitrogen compounds that settle from air pollution can act like fertilizer in coastal waters.
This can trigger algal blooms, which:
- reduce water clarity
- deplete oxygen when algae die and decay
- create “dead zones” where shellfish can’t survive
Oxygen depletion (hypoxia) is extremely stressful or fatal to shellfish.
3. Direct toxicity is minimal
NOx doesn’t typically reach concentrations in water that would directly poison shellfish. The harm is mostly through acidification and eutrophication.
That's actually very true. Unless the carburetor has also been smogged to death and even then they had issues.
Would it be best to convert to EFI? Is it because the AFR can swing so much?
I guess we have to ask for ID and age here...
What is wrong with getting younger people into A Bodies?
Meh. We'll never get through no matter the age. He's lost to Kommiefornika.
Not one single thing.
I love the air quality over here. I have been to industrialized countries with little to no regulations and the air quality is disgusting. So I don't mind helping to keep my part of America great.
remytherat
Well-Known Member
Carbureted cars produce relatively small amounts of nox emissions, which seems like debunks your whole point.
I understand you concern I guess, but it sounds a bit like taping sponges to your feet to avoid killing the ants.
On some level the shellfish are fucked either way and you are not the problem. I had great oysters tonight. Anyways.
Just enjoy your car. Putting cats on it would likely require you to run efi to avoid burning them up, and would cost a ton.
I understand you concern I guess, but it sounds a bit like taping sponges to your feet to avoid killing the ants.
On some level the shellfish are fucked either way and you are not the problem. I had great oysters tonight. Anyways.
Just enjoy your car. Putting cats on it would likely require you to run efi to avoid burning them up, and would cost a ton.
340six
King Of Bling
Nothing unless it says Free Candy on the sides.
mopowers
Well-Known Member
You're missing a pretty important aspect. What's the primary driver of ocean acidification? Then look at your answer to question #1.
-
Similar threads
