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Topic Review (Newest First)
12-26-2014 01:35 PM
NickCornell Insert ain't even mad meme*
12-26-2014 01:15 PM
dyn085
Quote:
Originally Posted by suss6052 View Post
With a modern engine it barely even gives more power and it's not technically legal even without emissions inspections.
^ Exactly this. While we don't know exactly what octane level our timing maxed itself out at, you can pretty much guarantee it's either 91 or 93 octane. Anything above that is just throwing money in the wind for no reason at all.

Insert meme here.
12-26-2014 10:06 AM
suss6052
Quote:
Originally Posted by NickCornell View Post
Pretty much what I said before. But my 2 liters of fury couldn't pollute if it wanted to haha.
That's not true at all, the newer engines are more fuel efficient, but that doesn't mean they pollute less per mile than before without the catalytic converter to clean the exhaust up, a lot of the efficiency gains can cause the car to produce more NOx due to running hotter etc. The three way catalyst goes after primarily three things:

Reduction of nitrogen oxides to nitrogen and oxygen: 2NOx → xO2 + N2
Oxidation of carbon monoxide to carbon dioxide: 2CO + O2 → 2CO2
Oxidation of unburnt hydrocarbons (HC) to carbon dioxide and water: CxH2x+2 + [(3x+1)/2]O2 → xCO2 + (x+1)H2O.

I'm not an environmentalist but I don't like gassing my self either from personal experience with a decatted car. With a modern engine it barely even gives more power and it's not technically legal even without emissions inspections.
12-24-2014 12:05 PM
sailor Yeah, that can make a difference.

IIRC CA gets a break for a few years with a new car, & it eventually goes to every two years for inspection (rough details, I don't keep current on their latest). At that point many end up returning to stock just to get through inspection & any old parts lost or not working is a problem. This year I saw a few that had been OK with aftermarket intakes needing to find replacements for their old stock ones that were thrown away long ago - standards tightened up.
12-24-2014 12:03 PM
papaacer Yeah I remember alllllllllll the time about Catalytic converters :/
12-24-2014 10:42 AM
NickCornell Roger I hadn't even thought about the California bit.

Here in PA I'm not even in an emissions county. There's no inspection for it
12-24-2014 09:31 AM
TooOld
Quote:
Originally Posted by sailor View Post
History lesson from the Old Fart

Lead was removed from gasoline both to get rid of the toxic emission AND because CAT converters used to reduce pollution have the Platinum "poisoned" by the lead so they won't work after enough leaded gas is used - how fast to total failure depends on concentration used in the fuel, degradation starts immediately. Actual Catalyst is a platinum coating on the ceramic medium, the reason a CAT is so expensive & valuable for recycling.

This is why fuel nozzles at the station are so small & fit in a smaller hole than the cap opening. That was standardized to prevent using leaded in a CAT equipped vehicle during the phase over when both types were commonly avail. & remains a requirement today.
Don't forget rhodium and palladium in catalytic converters. Palladium is close to platinum in price, rhodium not so much.
12-24-2014 02:16 AM
sailor Just added some extra history to your comments, Jose is in CA & he's got to keep working CATs avail. for testing when needed - they check a lot closer there even if not as often.
12-24-2014 02:01 AM
NickCornell Pretty much what I said before. But my 2 liters of fury couldn't pollute if it wanted to haha.
12-24-2014 01:14 AM
sailor History lesson from the Old Fart

Lead was removed from gasoline both to get rid of the toxic emission AND because CAT converters used to reduce pollution have the Platinum "poisoned" by the lead so they won't work after enough leaded gas is used - how fast to total failure depends on concentration used in the fuel, degradation starts immediately. Actual Catalyst is a platinum coating on the ceramic medium, the reason a CAT is so expensive & valuable for recycling.

This is why fuel nozzles at the station are so small & fit in a smaller hole than the cap opening. That was standardized to prevent using leaded in a CAT equipped vehicle during the phase over when both types were commonly avail. & remains a requirement today.
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