Question--Injector on time versus Intake event

[Bruce Plecan]

It takes longer to fill the cylinder with fuel then air.
Would take a HUGE injector, to dump the fuel at WOT during only the time the
valve was open.

The current system, uses a combo of atomization, and vaporization to even
get the fuel into a burnable state in the chamber.  So often with SEFI they
blow the fuel at a closed intake valve to vaporize some of the fuel, to help
it mix better in the chamber.
HTH
Bruce



From: "Ron Boley" <ronboley at bellatlantic.net>
> The engine is a 351W with 24lb injectors and it looks to be about 400hp at
> the flywheel.  My my cam specification says that the intake event is 280
> degrees.  At 6000 rpm the engine is rotating once every 10 milliseconds
and
> it takes two revolutions for a complete cycle.  So the math
[(280/720)*20ms]
> says the intake event should be in the range of  7.78ms.
> My datalog says the injector is active for over 16.7ms at 6000 rpm!  Is an
> on-time of 16.7ms excessive or out of range here?   Please elaborate and
> share the theory.  It feels wrong but the car doesn't seem to be
compaining
> :-)
> Thanks Ron

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