David Teitelbaum wrote: >You think CO2 is not poisonous? > I know it's not poisonous - you and I breath it out every couple of seconds, it's emitted by plants during respiration, it's one of the building blocks of life. It's NOT a pollutant, despite what the environmentalists will have you believe. It is also not odourless in high concentrations (like the top of a freshly poured glass of fizzy drink, or a fire extinguisher). What you're talking about is simple lack of oxygen, not the effect of CO2 - and you would most likely wake up in that unlikely event. Carbon monoxide is very, very poisonous and has the effect of replacing oxygen in the bloodstream, IIRC. A person inhaling it in their sleep will never know because it causes unconsciosness. I'm not arguing against responsible use of CO alarms, but CO2 is not a dangerous gas, and a car equipped with a cat will emit only tiny amounts of CO. Try putting a CO meter up the exhaust of a DeLorean with a cat, and see how much it reads. I regularly work with de-catted DeLoreans and adjust the mixture using my CO meter, which should be 1% for a lambda equipped engine and 1.5-2% CO for a B28E metering equipped engine (popular over here for the added performance). Martin [Non-text portions of this message have been removed] ------------------------------------ To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnewsYahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/dmcnews/join (Yahoo! ID required) <*> To change settings via email: mailto:dmcnews-digest@xxxxxxxxxxxxxxx mailto:dmcnews-fullfeatured@xxxxxxxxxxxxxxx <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/