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> The acceptable particulate level in Colorado emissions testing is 35% opacity. That means the smoke and particulates that are coming out of the exhaust pipe c
by po 11y ago
> The acceptable particulate level in Colorado emissions testing is 35% opacity. That means the smoke and particulates that are coming out of the exhaust pipe can block up to 35% of light and pass the test. This is a lot of smoke.
This is the most shocking part of this... can you really pass with that much smoke coming out the tailpipe? That's absurd and I find it hard to believe. What's even the point of testing based on those regulations?
- Asbostos 11y agoThe 35% is a meaningless number without more details. It's not shocking at all if a 1km column of smoke blocks more than 35% of the light passing along it. So we need to know more about the test to decide if it's shocking or not - specifically the distance the light travels through the sample. Integration time is also important. Short bursts of dense smoke can be equally polluting as a continuous stream of light smoke.