DFI, Batch Fire, and other myths

[andy quaas]

Is it true that none of the firing methods actually time the injector
to the intake stroke of that cylinder?  I would think that injecting
fuel on the other strokes would be a waste.  

Andy


---Sandy <sganz at wgn.net> wrote:
>
> I think that injection of all the fuel during a period has some
SMOG/Econ
> bennifits, but can't remember if any power was gained (anyone?). 
Others
> have stated that the evaporation of the fuel sitting on the closed
valve is
> better then squirting raw liquid fuel (hard to burn) into a
cylinder.  I
> think that is why you don't see much power difference between SFI
and BATCH
> systems.
> 
> Sandy
> 
> At 10:17 PM 1/20/99 -0600, you wrote:
> >
> >
> >Ward Spoonemore wrote:
> >
> >> Tom
> >> Your Edelbrock ProFlo is typical on several other EFI system's
> >> actualy the tests I have run show little on no differace between
L/R and
> >> other systems.
> >> In fact all EFI are on almost 100% at or near WOT.
> >> Ward
> >
> >There is an ongoing discussion about the need to inject all (or
most) of the
> >fuel while the intake valve is open, probably starting before the
valve
> >opens and ending before it is closed. It would require large P&H
injectors
> >and lotta of pressure.
> >
> >Any ideas or comments (or experiences).     Regards  Tom
> >
> >
> 
> 

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