[V8] sanity check, what, from a V8Q owner?
lundabo at msn.com
lundabo at msn.com
Mon Mar 24 09:42:47 PDT 2008
I received the knobs...thanks! Anyway I can pay you for shipping, etc.?
Bill> Date: Sun, 23 Mar 2008 15:23:00 -0500> From: indischrot at gmail.com> To: urq at pacbell.net> CC: v8 at audifans.com> Subject: Re: [V8] sanity check, what, from a V8Q owner?> > FOUR CYCLE?!?? But all those A4 guys run TWO CYCLE oil!!!!> > LOL, my mistake. Yes, you are correct sir!> > > > urq wrote:> > >No. On a given engine you would expect little to any mileage benefit from a> >sequential EFI system over a batch system ... the number of injectors firing> >simultaneously really doesn't have any significant impact on fuel economy.> >If all cylinders were the same and the intake charge was identical then all> >cylinders would need the exact same amount of fuel and there would be> >nothing to be gained in terms of fuel economy. The fuel injected by the> >injectors all ends up getting sucked into the cylinder and burned, it can't> >go anywhere else. Where a sequential system shines is that it can meter> >fuel to each cylinder based on the operating parameters of that cylinder ...> >modern ECUs and OXS' have the bandwidth to validate the exhaust from each> >cylinder and make compensation on a cylinder basis. That said, I bet that> >many sequential systems don't even try to match the valve timing ... > >> >... minor point ... the V8 engine is a 4-stroke motor, so it actually takes> >two times around for all 8 to get a power stroke ... > >> >Steve B> >San José, CA (USA)> >> >-----Original Message-----> >> >If only 2 injectors are firing, surely we'd get better gas mileage?? > >The 944 batch fires 4 cylinders twice a revolution and still manages > >around 25-30 mpg. The V8q fires... yup.. 8 times a revolution. Two per > >90º, so yeah, bad gas mileage. > >> >I think someone out there has done stand-alone engine management? > >Anyone worked up sequential? I know guys in the 944 world have. > >Sequential gas mileage would (in theory) double mpg?> >> >_______________________________________________> >Audifans V8 mailing list> >Send posts to: mailto:V8 at audifans.com> >Manage your list connection: http://www.audifans.com/mailman/listinfo/v8> >> >You can help keep the audifans site running by shopping at http://audifans.com/shop/> >> >> > > >> > _______________________________________________> Audifans V8 mailing list> Send posts to: mailto:V8 at audifans.com> Manage your list connection: http://www.audifans.com/mailman/listinfo/v8> > You can help keep the audifans site running by shopping at http://audifans.com/shop/>
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