[Diy_efi] Intro, and q's about fuel economy

[Greg Hermann]

At 5:34 PM 12/15/02, James wrote:
>On Sun, 15 Dec 2002, Perry Harrington wrote:
>
>> If you don't already have an EFI expert (or Internal Combustion Engine
>>expert)
>> on the team, then you would do well to find one.
>
>Or become one.  :-)
>
>> I don't know if your competition has specific fuels mandated, but if you
>>search
>
>Yes, all teams use the same fuel.  100 octane.
>
>> it, as this will reduce your efficiency.  I'd actually recommend gapless
>>rings
>> to help retain as much combustion pressure as possible.
>
>We use gapless in the race.
>
>> Also, you didn't specify if the competition disallows enhancers or
>>modifiers to
>> the engine's intake of fuel/air.
>
>We aren't really willing to go in this direction yet.
>
>The main goal is to take a ucontroller, an EGO sensor, an injector, and a
>pump, and get them to work.  There are important design decisions to be
>make in terms of software algorithms, injector placement, EGO type, etc,
>and that's about all we'll have time for.
>
>Heated fuel lines and the like are an interesting idea, and one I hadn't
>yet encountered, but are too complicated at this stage, I think.  The most
>important thing is that it _works_, reliably, at the competition.  We'd
>rather build a well designed, simple system than an overly complex one.
>
>Next year... well, that's another matter.  :-)
>
>To give you an idea of the platform, see
>
>http://smv.berkeley.edu/SMV_2002/31.html
>
>It's somewhat crude (at least to someone who grew up with a full-size
>dodge pickup ;-), but most of all cramped.  Our success has come from the
>chassis and the shell being aerodynamic, but the tradeoff is that there
>isn't much real estate available.  And only short people get to drive it.

If the design of the chassis/drive line is open, there's a whole 'nother
world of how to WIN hiding there !!

Greg
>:-)
>
>-james
>
>
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