Question--Injector on time versus Intake event

[steve ravet]

At high rpm there's not enough time to squirt fuel while the intake is
open, so it squirts while it's closed also.  You're squirting for
16.7ms/20ms= 83% of the available time at that rpm.

--steve

Ron Boley wrote:
> 
> I'm a little confused about what I am seeing when I measure my injector on
> time at 6000 RPM.
> 
> 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

-- 
Steve Ravet
steve.ravet at arm.com
ARM,Inc.
www.arm.com
----------------------------------------------------------------------------
To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes)
in the body of a message (not the subject) to majordomo at lists.diy-efi.org