Gordon McGrew wrote:

>On Tue, 15 Apr 2008 04:06:26 -0700 (PDT), ACAR
><dimndsonmywndshld@yahoo.com> wrote:
>
>
>
>>On Apr 12, 4:49 pm, ecarecar <ecare...@yahoo.com> wrote:
>>
>>
>>>I am looking for a plot of engine speed vs. fuel consumption. Is one
>>>available anywhere? I am not at all picky about what specific engine.
>>>
>>>
>>I suspect Universities that compete in building very fuel efficient
>>vehicles (esp. hybrids) would have this information available to the
>>public.
>>
>>Marine applications may be a source, too.
>>
>>Maybe Briggs & Stratton has that info. for their lawn mower engines.
>>
>>
>>
>
>Here is a plot of Brake Specific Fuel Consumption vs. rpm for a VW TDI
>engine.
>
>http://forums.tdiclub.com/showthread.php?t=208125
>
>BSFC is the measure of how much fuel is being consumed per unit power
>generated - a true fuel efficiency measurement. To get an absolute
>fuel consumption rate, you could multiply the BSFC by power at a given
>rpm. Of course this all assumes wide open throttle. If you are
>running at a lower power setting, the absolute fuel consumption will
>be lower. I would guess that BSFC might be higher or lower depending
>on the way the engine is set up.
>
>
>Maybe the OP could tell us exactly what he wants to know.
>
>
>
This is WOT? Therefore, it is also full throttle ignition advance?
The bottom of the curve is quite narrow.