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Date:         Mon, 30 Aug 2004 08:24:27 -0400
Reply-To:     Joy Hecht <jhecht@ALUM.MIT.EDU>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Joy Hecht <jhecht@ALUM.MIT.EDU>
Subject:      Re: emissions data
In-Reply-To:  <20040830042609.79408.qmail@web41311.mail.yahoo.com>
Content-Type: text/plain; charset="US-ASCII"

:::-----Original Message----- :::From: Vanagon Mailing List [mailto:vanagon@GERRY.VANAGON.COM] On Behalf :::Of gary hradek :::Sent: Monday, August 30, 2004 12:26 AM :::To: vanagon@GERRY.VANAGON.COM :::Subject: emissions data ::: :::Jon, ::: No numbers for you just concepts. Most fuel :::injection engines run about the same. It is the Cat :::that scrubs out the pollutants. The nuber of valves :::an engine has also helps clean thing up a bit. New :::engines have a new rating of low emission and ultra :::low emission largely do to the newer controls. :::None of this will change the amount of co2 emission.

Actually, that's not quite right. CO2 emissions are a linear function of gasoline burned, so improving fuel efficiency reduces CO2 emissions. So diesels are better than regular engines - but they emit a lot more particulates and other pollutants. That's why hybrids - the SULEVs (super low emissions vehicles) - are looking good these days, pending concerns about life cycle impacts (battery disposal). Fuel cells are worse because synthesizing the hydrogen consumes more energy than driving a regular car would.

Joy

******************************************************************* Dr. Joy E. Hecht Consultant on Environmental Policy and Information

Email: jhecht@alum.mit.edu Phone: 1-202-494-1162

******************************************************************* :::-----Original Message----- :::From: Vanagon Mailing List [mailto:vanagon@GERRY.VANAGON.COM] On Behalf :::Of gary hradek :::Sent: Monday, August 30, 2004 12:26 AM :::To: vanagon@GERRY.VANAGON.COM :::Subject: emissions data ::: :::Jon, ::: No numbers for you just concepts. Most fuel :::injection engines run about the same. It is the Cat :::that scrubs out the pollutants. The nuber of valves :::an engine has also helps clean thing up a bit. New :::engines have a new rating of low emission and ultra :::low emission largely do to the newer controls. :::None of this will change the amount of co2 emission. ::: :::Long and short of it is that the larger the engine and :::the larger the vehicle the more co2 will be emitted :::and this is where I might begin to draw a line on :::ethics. If you drive a bigger vehicle than you need :::to do the job than you have crossed the line. I :::really doubt that you will go to hell just make the :::earth more like hell. regards gary :::Date: Sun, 29 Aug 2004 12:41:46 -0400 :::From: Jonathan Farrugia <jfarrugi@UMICH.EDU> :::Subject: emissions data ::: :::given all this talk about emissions i am interested in :::getting some :::emissions data. i have always generally considered :::that the new the :::engine the better the engines emissions. hence the :::california swap :::regulation that you can swap in a new engine but not a :::older engine. :::so i :::would like to find out the emissions of several model :::years and makes :::of :::volkswagens. i have no idea where to acquire this :::data. i assume the :::epa :::site might have the data some where or it could be in :::an emissions test :::manual or book. ::: :::i have always figured that engine swapping with NA :::approved engines :::from :::later model cars was a good way to improve my vanagons :::emissions. i :::would :::like to see how much better my actual emission should :::be. ::: :::i would like to get data for the following years and :::makes of :::volkswagens. :::thanks for what you can contribute. ::: ::: ::: ::: :::__________________________________ :::Do you Yahoo!? :::New and Improved Yahoo! Mail - Send 10MB messages! :::http://promotions.yahoo.com/new_mail


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