The SDi engine is basically the same as the TDi, but without turbo. In Europe, TDi is a turbodiesel direct injection (in the 1.9 litre size has versions from 90 to 150 CV, depending on the car model). SDi is an atmospheric direct injection, with 65 CV in the 1.9 litre version and 60 CV in the 1.7 litre. I have driven the atmospheric engines and they achieve good fuel economy, but do not expect to win a race with them.
-----Mensaje original----- De: Nick Taylor (SMTechnology.com) [mailto:[EMAIL PROTECTED] Enviado el: miˇrcoles, 12 de marzo de 2003 11:01 Para: biofuel@yahoogroups.com Asunto: RE: [biofuel] The TDI-SVO controversy? Ed, They are Caddy's are 1998 models (not the earlier pickup version). I don't know what you mean about swirl chambers...sorry, all I know is that they have an SDi badge on the back (and on the engine), and one with TDi... Are all the filters still absolutely necessary (10 to 5 micron) when using virgin oil too? Also is the addition of ethanol to SVO necessary even when you are using a pre-heat method? I suppose that would make sense in the UK as its not always the warmest place to be! Nick -----Original Message----- From: Neoteric Biofuels Inc [mailto:[EMAIL PROTECTED] Sent: 11 March 2003 17:18 To: biofuel@yahoogroups.com Subject: Re: [biofuel] The TDI-SVO controversy? Nick, by SDi, do you mean swirl chamber engines? What year are the Caddy's? If you use "pure plant oil", (Canola, "OSR", "rapeseed"), and preheat, and have good filtration and a two-tank system, you concerns are minimal on the swirl-chamber engines. Also oil changes need to be done by the book. We are adding a new on-vehicle SVO filtration system soon, which will allow use of a large spin-on cartidge filter. Ten micron is standard, but we are also going to try the 5 micron and then the 2 micron filter cartridges, as the filtration becomes more and critical on the newer engines (Tdi's, etc.) Double water separators, vacuum gauge, etc. will be standard with this arrangement. The white spirit story is considered to be useless by most members of this list who have experience with vegoil use in diesels. However, of interest is the ACREVO study, which found that blending 9% ethanol into new rapeseed oil reduced the preheat temp. needed in a small DI engine from about 150C down to about 80C (in the range of two-tank system heating ability), and that this gave combustion characteristics in the DI engine very similar to diesel fuel (without the ethanol, 150C was needed for get the same combustion characteristics as diesel). The study also found that particulate emissions, already reduced by half by use of the rapeseed oil versus diesel fuel, were cut roughly by half AGAIN when the ethanol was blended in. Edward Beggs http://www.biofuels.ca "G3 SVO Systems, VEG-Therm 12V heaters" On Tuesday, March 11, 2003, at 07:11 AM, Nick Taylor (SMTechnology.com) wrote: > Hi guys, > > Been thinking of converting the company VW Caddy Vans (3x 1.9 SDi, 1x > 1.9 TDi) to run a two tank SVO system (most likely the DieselTherm one > - > http://www.diesel-therm.com/veggie-kit.htm). > I've been reading about what engines are suited / not suited, and I see > that VW are among the leaders in Diesel technology, which is > comforting, > but the idea of pumping in heated (virgin) cooking oil into the engine > still scares me....all those stories of gumming up etc. > My question is this; does the TDi theory apply to SDi engines? I'm a > computer nerd, so won't be able to tell the difference (except for the > badge of course!). Has anyone here run an SDi caddy van on SVO before? > Also, been reading that you can add 5-10% white spirit to the oil and > use it directly without modification to the engine...seems a little > 'too > easy' for me to believe.....anyone got any experience / views on this? > We probably won't use WVO, we will source virgin oil from a local > supplier. What oil type is best to use? Rapeseed, coconut etc??? > > Thanks for the input guys, > > Kind Regards > Nick Taylor, > Technical Consultant. > SMTechnology.com > > > > [Non-text portions of this message have been removed] > > > > Biofuel at Journey to Forever: > http://journeytoforever.org/biofuel.html > > Biofuels list archives: > http://archive.nnytech.net/ > > Please do NOT send Unsubscribe messages to the list address. > To unsubscribe, send an email to: > [EMAIL PROTECTED] > > Your use of Yahoo! Groups is subject to > http://docs.yahoo.com/info/terms/ > > Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuels list archives: http://archive.nnytech.net/ Please do NOT send Unsubscribe messages to the list address. To unsubscribe, send an email to: [EMAIL PROTECTED] Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuels list archives: http://archive.nnytech.net/ Please do NOT send Unsubscribe messages to the list address. To unsubscribe, send an email to: [EMAIL PROTECTED] Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuels list archives: http://archive.nnytech.net/ Please do NOT send Unsubscribe messages to the list address. To unsubscribe, send an email to: [EMAIL PROTECTED] Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
