If you want acceleration, get an X3 with the six-cylinder turbo engine. At this point I think all BMWs have turbocharged engines, diesel and not.
---- Frank Wimberly www.amazon.com/author/frankwimberly https://www.researchgate.net/profile/Frank_Wimberly2 Phone (505) 670-9918 On Fri, Mar 30, 2018, 5:32 PM Owen Densmore <o...@backspaces.net> wrote: > Wait! Your sports car (Porsche) would have a high compression ratio, > right?? > > My bias is away from diesel at the moment, simply because it costs more > and some of the benefits are no longer with us. No longer cheaper etc. But > they do have more pick-up, and apparently better maintenance. > > Keep the cards and letters coming tho, very useful! > > -- Owen > > On Fri, Mar 30, 2018 at 5:02 PM, Eric Smith <desm...@santafe.edu> wrote: > >> Thank you Frank and Steve, both, >> >> >> > On Mar 31, 2018, at 3:33 AM, Frank Wimberly <wimber...@gmail.com> >> wrote: >> > >> > My petrol car has a 12.2 to 1 compression ratio and sparkplugs. >> >> Boy, I was way off. Thank you. >> >> Eric >> >> >> > >> > ---- >> > Frank Wimberly >> > >> > www.amazon.com/author/frankwimberly >> > >> > https://www.researchgate.net/profile/Frank_Wimberly2 >> > >> > Phone (505) 670-9918 >> > >> > On Fri, Mar 30, 2018, 9:53 AM Steven A Smith <sasm...@swcp.com> wrote: >> > I just read up a little on Selective Catalytic Reduction which seems to >> > characterize Bruce's Urea-injection system. >> > >> > https://en.wikipedia.org/wiki/Selective_catalytic_reduction >> > >> > Which is similar but different to Air Injection: >> > >> > https://en.wikipedia.org/wiki/Secondary_air_injection >> > >> > both in various combinations with two-way and three-way catalytic >> > converters: >> > >> > https://en.wikipedia.org/wiki/Catalytic_converter >> > >> > >> > I remember in the late 70s, early 80s when we imagined that an ICE >> > engine that could efficiently convert atmospheric oxygen and the >> > hydrocarbons of fossil fuels into pure CO2 and H20 would solve any and >> > all "pollution" problems. Folks like Bill McKibbin were already trying >> > to alert us to Greenhouse Gas problems, but I know *I* wasn't listening >> > past my TechnoPhilic hearing aids. >> > >> > As for Ed's apocryphal "peeing in the gas tank", urine being primarily >> > H20... it seems highly unlikely that the <2% additive of Urea or Uric >> > Acid would be any benefit in emissions, though there have been systems >> > that injected water into the air-fuel charge which I believe (under very >> > limited conditions) increased power/efficiency by small margins, but I >> > think that was a result of cooling the incoming mixture effectively >> > increasing the difference between input/output temps resulting in >> > similar effects of increasing compression ration? >> > >> > >> > - Steve >> > >> > > I seem to remember this as being associated with higher nitrogen oxide >> > emissions than richer-burning. Has that long since been fixed? >> > > I believe that NO emissions are associated with the lean burn of >> > > Petrol... I'm not sure why Diesel is less apt to that... perhaps the >> > > longer chain hydrocarbons, the higher compressions (a different >> > > pointin the pressure/volume/temp space?) or the more "natural" or >> > > complete combustion conditions without a spark? >> > >> > >> > >> > ============================================================ >> > FRIAM Applied Complexity Group listserv >> > Meets Fridays 9a-11:30 at cafe at St. John's College >> > to unsubscribe http://redfish.com/mailman/listinfo/friam_redfish.com >> > FRIAM-COMIC http://friam-comic.blogspot.com/ by Dr. Strangelove >> > ============================================================ >> > FRIAM Applied Complexity Group listserv >> > Meets Fridays 9a-11:30 at cafe at St. John's College >> > to unsubscribe http://redfish.com/mailman/listinfo/friam_redfish.com >> > FRIAM-COMIC http://friam-comic.blogspot.com/ by Dr. Strangelove >> >> >> ============================================================ >> FRIAM Applied Complexity Group listserv >> Meets Fridays 9a-11:30 at cafe at St. John's College >> to unsubscribe http://redfish.com/mailman/listinfo/friam_redfish.com >> FRIAM-COMIC http://friam-comic.blogspot.com/ by Dr. Strangelove >> > > ============================================================ > FRIAM Applied Complexity Group listserv > Meets Fridays 9a-11:30 at cafe at St. John's College > to unsubscribe http://redfish.com/mailman/listinfo/friam_redfish.com > FRIAM-COMIC http://friam-comic.blogspot.com/ by Dr. Strangelove
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