05-16-2019, 07:09 AM | #1 |
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Catless Vs Cats
Lets discuss the environmental affects of going catless....
Go!
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Last edited by theinfamousdrew; 05-24-2019 at 05:13 AM.. |
05-19-2019, 10:34 PM | #2 | |
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I just put in downpipes and I also hate the smell (and the thought of how much pollution i'm releasing, a study said 1 car without cats = 600 cars with cats, making my morning trip to work nearly two years worth of trips to work... everyday). I love the sound, so I'm going to try to install some high quality high flow cats in the mid pipe, since catted DP are crazy expensive. I've heard this kills the smell albeit not as effective as stock cats - its a good trade off. I'll make a post once I do this week. |
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05-23-2019, 08:52 AM | #3 |
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Interesting statement. What kind of car, diesel or petrol? Turbo or non-turbo? And what time period does that 600 cover? Ten minutes? Ten years? 10,000 years? More context is needed.
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05-23-2019, 11:19 AM | #4 | |
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Took me a minute to find the study but it looks like I was way off on the 600x more, and it looks like it's actually 6-12x more which makes me feel less guilty. The information about "600x more" was me repeating another forums thread.. another reason why its always good to do your own research. Graph at WOT (Unsure of engine size/coverter, but our cats are wire mesh) |
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05-23-2019, 11:54 AM | #5 | |
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05-23-2019, 12:18 PM | #6 | |
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The exhaust is 100% poisonous, I was getting something out of my trunk while the vehicle was running for about 2 minutes and it made my eyes water and I felt nauseous and dizzy afterwards. Friend driving behind me told me he could not be close to me because it was coming through his car even with his windows up. I don't think its completely a load of garbage... What reason do they have to make someone feel guilty for a modded car? Anyways, I bought a CO monitor that measures in PPM and I will post the results before and after the secondary cats to show the difference. Here is a news article of a couple that was killed after installing downpipes (albeit improperly). Carbon Monoxide is a completely odourless, and tasteless gas. Catalytic converters are proven to remove this from the exhaust. https://www.telegraph.co.uk/news/201...ed-up-improve/ I'm not saying all this because I'm completely against modding vehicles or downpipes or anything. I have catless downpipes installed. I'm just trying to share more information on the consequences and potential health effects of doing so. |
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05-23-2019, 12:25 PM | #7 |
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This took an unexpected turn........
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05-23-2019, 12:51 PM | #8 | |
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They want everyone to drive electric so they blame us hoping we will be converted, although we will have no choice in the matter one day. |
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05-23-2019, 01:09 PM | #9 | |
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According to wikipedia automobiles are responsible for 50~% of the worlds carbon monoxide - however pollution in general (Hyrdrocarbons, CFC, things bad for the ozone etc.) automobiles are a small small percentage. If BMW or Porsche were to release an electric performance or M vehicle I can't say I wouldn't be interested. The Torque in the Teslas is intoxicating lol |
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05-23-2019, 01:26 PM | #10 | |
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https://www.porsche.com/usa/aboutpor...iew/article01/
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05-23-2019, 02:13 PM | #11 | |
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05-23-2019, 04:36 PM | #12 |
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I'm going to stay stock cats and a DME tune locally. I'm not looking to break any records, weekend car w the family. That will be plenty for me, my days of exhaust fumes are over lol.
GL!
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05-23-2019, 04:51 PM | #13 |
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05-24-2019, 05:14 AM | #14 |
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05-24-2019, 07:14 AM | #15 | |
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One observation I made about my car since going catless is that the smell has noticeably diminished after running through a bottle of fuel system cleaner and continuous fuel treatment at every fill up. The smell is still there but not as much as before. The auto stop / start feature is a good way to mitigate too. |
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05-24-2019, 08:10 AM | #16 |
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I don't agree with removing Cats.
An M5 with a Stage 1 map is fast enough, if people are looking for 1000 bhp then yes I can see why you would need to but for an extra 25 ish bhp by removing cats and leaving it as that what's the point. |
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05-24-2019, 08:39 AM | #17 | |
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At the same time, I think race catted downpipes are the happy middle ground, but at $3k a pair they are wildly expensive... I have high flow cats going in my midpipes next week and will post back with CO readings. |
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05-24-2019, 09:19 AM | #18 | |
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05-24-2019, 09:40 AM | #19 | |
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Just going with some magnaflow 200 CEL cats. There are better cats out there, but for the purposes of my "experiment" I went for the budget ones. |
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05-24-2019, 04:24 PM | #20 | |
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05-24-2019, 09:44 PM | #21 |
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would be interested to see what the exhaust sounds changes are. I want better exhaust sound from the stock but didnt really want to gut my OEMs i would prefer to get gutted OEM cats but then have this to help with the environment and still have better exhaust sound.
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